Connection from IP address 44.211.239.1
Time: 2023 Feb 03 7:33:22
Found 2761 logbook entries, displaying most recent 100

Logbook Contents (Most Recent Entries)

27 Jan 2023 Friday 19:36 [Joseph Derkin] Chain stretch alarm went off at 19:21 while taking data. Accelerator was immediately shut down.

27 Jan 2023 Friday 00:31 [Nisha Singh] The chain stretch alarm went off during the run aropund 11:20 pm. The alarm was ackowledged. Greg was called and the accelerator was turned off. When the chain motors were turned off the chain stretch alarm light on E1 panel cleared. Since ereything seemed normal, the accelerator was turned on again and the charging voltage was set to ~4.5 MeV. Withing 15 minutes of the accelerator on, the alarm went off again. After contacting Greg, he advised to put the charging voltage at 0.1 and turn on the accelerator to see if the alarm goes off again. Within 10-15 minutes, the chain stretch alarm went off. So the accelerator was shut down according to shut down protocols. The pulsing and buching, magnets and the steers were all turned down while the source was still left on.

27 Jan 2023 Friday 00:05 [Joseph Derkin] Chain stretch alarm went off at approximately 11:20PM, in the middle of taking data. Alarm was acknowledged on the E1 panel but the indicator light was still on. The chain motors were then turned off, and Greg was called. Greg advised to restart the accelerator, and the chain stretch alarm did not trip again. Greg said it was okay to cautiously resume data taking.

25 Jan 2023 Wednesday 21:58 [Joseph Derkin] Accelerator shutdown module shut down the accelerator at ~21:35 on Wednesday January 25. E2 alarm tripped, sub loops temp warning light was on; unitility loop light engaged in the vault. Per Greg's direction, we are leaving the control power off over night and he will investigate in the morning.

19 Jan 2023 Thursday 13:07 [Tom Massey] We had a spark when condintioning the column. We had no excursions on the LE vacuum up to 4.5 MV. When we went to 4.550 MV we had an excursion and a spark. We will wait 10 minutes and try again.

18 Jan 2023 Wednesday 13:54 [Leblanc et. al.] Tank spark today caused E1 alarm panel to light up. After reset and shutdown, E1 input 9 (chain stretch) was stuck in latched ON. Chain stretch switch was open, indicating that the fault is in the E1 panel circuitry. Moved chain stretch alarm to input 10. Will verify chain stretch switch at next tank opening. Cleared operators to resume operation.

18 Jan 2023 Wednesday 09:29 [Bikash Chauhan] Ion gauge under stairs requires a change of filament. Currently, we are using backup filament.

09 Jan 2023 Monday 15:07 [Leblanc, Carter, Gothberg] Quarterly Safety Checks completed by Leblanc, Carter, and Gothberg. Operator DRD accumulated dose: 0.24mR, 2nd DRD accumulated dose: 0.00 mR.

03 Jan 2023 Tuesday 11:09 [Ingram] Energy calibration checks have been done with elastic scattering of alphas by oxygen at 3.035 MeV, 5.139 and 5.375 MeV where there are obvious resonances. The scattering angle was 168 degrees. The energy was determined by the NMR in the usual way via the analyzing magnet. For both 3.035 and 5.375 the energy determined by the NMR setting may be up to 5 keV low. Both of these resonances are narrow enough to detect this but the energy increments used were 5 keV. Also, it likely that the energy resolution with all the slits at 0.030" is not less than 5 keV. My conclusions is that the energy calibration of the machine has not been significantly affected by the flood.

03 Jan 2023 Tuesday 10:56 [Ingram] Recent tests of the Alphatross have indicated that currently 90 V is the best voltage at which to operate the oven. The output will increase about 20% by increasing the voltage to 95V. This is much less than the increase from 85 V to 90 V. There is no benefit to operating above 100V. The oven temperature is not a reliable measure in terms of the output. It varies over a few minutes by 5-7 deg C. Is this rf noise? Work with the source over about a month has seen the LE cup output drop from 900 nA to about 250nA .This is with the insert at a depth of 0.025". This was the highest output seen as we increased the depth.

21 Dec 2022 Wednesday 10:50 [Leblanc, Carter] Oven temp readings very erratic with the RF on. We added 3 ferrites near the controller, and 2 near the oven at a safe distance from the heat. Tightened the terminal screws holding the wires in the connector at the controller. Unplugged the ground on the shield from the controller. Readings seem steady so far.

21 Dec 2022 Wednesday 09:33 [Ingram] Alphatross oven temp is reading very negative with the rf on.

08 Dec 2022 Thursday 15:07 [Joseph Derkin] E1 alarm tripped at ~ 14:45, under "Water hot or air low" message. Greg inspected main loop temp and receiver/line pressure. 2-3 minutes later E2 module tripped and E1 with "water hot or air low". Accelerator shutdown. Magnet loop warm.

25 Nov 2022 Friday 16:29 [Tom Massey] I found the alarms soudning when I was in the Lab. The AIR/WATER interlock had tripped the alarm. I reset the Shutdown alarm and the leftmost E1 alarm "Water Hot or Pressure Low". The plots of the temperature and pressure readings do not show any excursions.

23 Nov 2022 Wednesday 14:46 [Leblanc] Process chiller repair notes, various dates. We had a solenoid coil pack fail on compressor #1 (largest compressor). This caused circuit 3 not to run, and eventually caused us to blow fuses on the control transformer, which is how we eventually found the problem. With the coil replaced and the cutout switch reset, compressor #1 was found to be short cycling, even when the main controller was not calling for any cooling. Troubleshooting eventually found that one set of contacts on the control relay had welded, causing that compressor to stay on continuously. This was probably caused when the coil pack gradually failed and drew more and more current. Currently compressor #1 is disabled by removing the control relay until a replacement can be obtained. Relay PN is 55.34.8.240.0000 and they are available from Newark. Steve from Professional Refrigeration & A/C was on-site to assist with troubleshooting and repair. Additionally, the freeze protection thermostat probe wires for compressors 1 and 3 were found to have been cut, probably by a string trimmer. The units will display "EP" when the probe has failed or the wire is cut. They are currently patched with wire nuts, but running them through some liquid-tight conduit would be a safer solution, and will be done as weather and time permit.

17 Nov 2022 Thursday 10:26 [Ingram] Generator test this morning

16 Nov 2022 Wednesday 09:00 [Ingram] Tritium alarm and the soutter source low flow alarm both going off. No obvious reason. Rest the tritium. Source low flow silenced. BTW this keyboard at the control desk has no lights except the Fn key which is flashing,

07 Nov 2022 Monday 21:06 [Ingram] Alphatross testing continued. The source is being run under the conditions in the handbook except the oven voltage is 115 V. The output of the source does not seem to depend strongly on the oven voltage. I have varied the voltage from 100 V to 120 V. The oven temperature was 177 deg F after 20 minutes at 115 V. After two hours the temperature was 179 deg F but had been varying +/- 3 deg F. The temperature of the oven varies randomly with very short periods. Is this caused by RF pickup? The output of the source at the LE cup does increase slowly for about two hours after turning the source on with the oven at 115 V. This follows the slow change/increase in the temperature of the chamber. There is black plastic over the side away from the camera to reduce the air flow from the HVAC affecting the temperature of the oven. The HVAC operation does affect the output of the source as noted in the winter of 2020/21. That variation takes 20 minutes or so. Reducing the gas flow from 0.35 sccm to about 0.20 sccm does increase the source output by about a factor of two. The latest test was on November 3, 2022 with the BN insert drilled out by 0.025''. This gave close to 1 uA in the LE cup. The LE cup current has been increasing as we have increased the depth of the drilling of the BN insert. The probe current is now over 2 mA. But does not change at the same rate as current in the LE cup. The next test will be with an insert drill out to 0.030''.

07 Nov 2022 Monday 19:11 [Ingram] Foil check November 3, 2022. Using 2.2 MeV He++ with about 1uA in the LE cup the following foils are rated as good. The current in the HE cup was about 1 uA for the good foils. Other foils had zero to 0.3 uA. Foils 43, 44, 46, 47, 48, 49, 50, 51, 54, 57. Foil 43 is 2 ug/cm2, the rest are 5 ug/cm2. This is similar to what we last year at this time.

07 Nov 2022 Monday 09:44 [ Leblanc] Alarm in control room was SF6 monitor. Tank volume looked constant over 1000 points. Full month plots fluctute by a full bottle (roughly 30.5 min, 31.5 max). Full year data shows a steady drop in volume, approximately 1 bottle per year. Will do another leak check.

07 Nov 2022 Monday 09:18 [Ingram] Loud beeping noise in the control room. Probably a UPS near the SF6 pressure monitor. I have to go to class.

06 Nov 2022 Sunday 16:46 [Ingram] Source cooling water low. It will need to be filled before running tomorrow.

04 Nov 2022 Friday 14:14 [carter/massey] Swinger to tweaker ratio for deuterons ? 174.295 / 7.3744 = 23.635

27 Oct 2022 Thursday 09:50 [Ingram] Generator testing

18 Oct 2022 Tuesday 07:05 [carter] The switcher magnet power supply should now be able to provide up to 120 Amps to the switcher magnet. Experiments that require less than 120 Amps on the switcher magnet should be able to run. The stability of the 2-supply operation looks good and was tested up to 75 Amps. To avoid unnecessarily stressing the system, operation at higher currents will be done when there is an intent to use the higher currents, but no known issues exist that would prevent operation to 120 Amps. Because of the recently discovered fact that the switcher magnet measured current was was reading low (0.76) of the actual value, and we are now indicating the "actual" switcher current, the "magnet predictor" value for the switcher current needed for a particular beam and energy will need to multiplied by 1.315 to determine the estimated actual current now needed from the switcher power supply.

18 Oct 2022 Tuesday 06:49 [carter/leblanc] A second 60 Amp power supply was added as a "slave" to the original 60 Amp supply we are using for the switcher magnet power supply. The control of the magnets is still done using the "switcher 60" control window. This computer window will display 1/2 the actual magnet current when the second power supply is enabled. This was done to preserve the more precise "setability" (minimal stepsize) of the switcher 60 control window but since there are 2 supplies in parallel, the actual current is twice the setpoint current. The analog panel meter and the logging systems will display and record the "actual" magnet current. The power supply console panel indicates these changes with new labeling.

14 Oct 2022 Friday 09:55 [Joseph Derkin] Quarterly check: user DRD accumulated dose is 0.0 mR/h, operator DRD accumulated dose is 0.13 mR/h

12 Oct 2022 Wednesday 15:56 [carter] Repaired pit O2 monitor has been installed and seems to be operating correctly again.

09 Oct 2022 Sunday 19:45 [Ingram] Notes on operating the Alphatross 3-Oct-22 Started in the morning, 9:00 AM After 3 hours with oven at 80 V, T_oven 152 After 20 min at 85 V T_oven 154.5 After 2 hours at 90 V, oven varying between 156 and 158 Took Lens A to 14 kV from 10 kV and doubled beam in LE cup 2:30 PM reduced oven to 85 V current LE cup at 150 nA Drop in 5 seconds to 110 nA but temperature did not change. Voltage did in plot. 2:50 PM temp has now dropped to 155 Oven back to 90 V, current back up in less than a minute 3:10 PM current LE cup 150 nA temp 157 Shutdown, will add draught excluder tomorrow 4-Oct-22 Black plastic sheet added on side of source away from camera Started source oven to 80V, 9:15 AM 9:46 AM oven at 152 degC 9:52 AM oven at 156 degC 10:04 AM oven at 158 degC beam current rising slowly now at 75 nA, lens A peak 12 kV 10:26 AM oven at 156-158 on plot LE cup 75 nA, 10:44 AM oven at 156 oven to 85 V LE cup 75 nA 10:45 AM oven at 157 LE cup 90 nA 10:47 AM oven at 158 LE cup 100 nA 11:12 AM oven at 160 LE cup 120 nA, oven to 90 V 11:32 AM oven at 162 LE cup 160 nA current wandering up and down 20 nA, oven to 95 V Notes that old Rb heater was 75 V 1.04 A or 72.1 ohms, new heater is 96 V at 1.19 A or 80.7 ohms. Therefore, need more voltage for the same power. 11:38 AM oven at 164 LE cup 210 nA 11:56 AM oven at 164 LE cup 250 nA 12:22 PM oven at 165 LE cup 250 nA wandering up to 280 nA down to 220 nA, oven to 97.5 V 12:28 PM oven at 166 deg C LE cup 300 nA oven to 100 V 12:32 PM oven at 167 deg C LE cup 350 nA, less wobbly 1:54 PM oven at 169 deg C LE cup 380 nA oven to 105 V 2:27 PM oven at 171.6 LE cup 400 nA 2.2 MeV 4 nA on target oven to 107.5 V 2:43 PM oven to 110 V target current 4.5 nA 3:02 PM oven at 174 deg C, oven to 115 V, LE cup 250 nA, refocus to 400 nA LE cup, then 400 nA HE cup 3:23 PM oven to 120 V 3:32 PM oven at 181 deg C no increase in target current 4nA or current in LE cup 400 nA when refocused.

04 Oct 2022 Tuesday 09:35 [Ingram] Draught excluder put on to side of Alphatross away from camera

03 Oct 2022 Monday 16:38 [carter] Alphatross source camera lost color, looked black and white only. Power cycled the camera and now has normal color picture.

27 Sep 2022 Tuesday 13:39 [Ingram] Fixed detector in STR moved to end of L30.

27 Sep 2022 Tuesday 13:20 [Leblanc, Ingram] Fixed detector in small target room moved to end of L30 beamline.

26 Sep 2022 Monday 08:35 [carter] Process chiller is down, probably since about 2:00 AM.

23 Sep 2022 Friday 11:39 [carter/leblanc] 24 VDC power supply that supplies DC power for console panel lighting failed. The power supply has been replaced and console lights working again. This power supply is located in the control-power main circuit breaker switchgear.

21 Sep 2022 Wednesday 10:06 [carter/leblanc] Phase voltage logging has been restored.

15 Sep 2022 Thursday 12:05 [carter] Lens A test and calibration. Panel meter 5KV, actual 5.420KV; panel meter 10KV, actual 10.820KV; panel meter 15 KV, actual 16.290 KV.

05 Sep 2022 Monday 15:40 [Ingram] HVAC dripping water on the floor from its pipes in LTR, again. Cable tray dry.

04 Sep 2022 Sunday 11:18 [Ingram] The water has been pumped out of the LTR cable tray. I think the water level detector has been reset. Greg has identified the failure and will work on fixing it next week. The vacuum and utility loops are still running. We should be able to test an ion source next week just with the secondary magnet loop running.

04 Sep 2022 Sunday 07:54 [Ingram] Water leak again, cable tray in LTR about full. Magnet loop fitting failed. Magnet loop isolated and pump shut off. I have left the vacuum and utility loops running.

17 Aug 2022 Wednesday 16:47 [carter] In the process of replacing the damaged magnet power supplies it was noticed that the currents displayed by the HVEC panel meters were not accurate compared to a Weston 500A 50 mV meter shunt. The old switcher was indicating 76 % of the actual current (displayed 76 amps at 100 amps as read by the shunt). The old analyzer was indicating about 105 % (displayed 105 amps at 100 amps as read by the shunt). The inflection supply was indicating 85 % of the actual current (displayed 0.85 amps at 1.00 amps as measured by the new Keysight supply).

03 Jul 2022 Sunday 16:32 [Carter] Not a surprise but heads up, the pit O2 monitor is not operational.

03 Jul 2022 Sunday 14:34 [Carter] I meant pit high water, not source high water in previous post.

03 Jul 2022 Sunday 14:33 [Carter] The source high water alarm will not reset automatically. It consists of a micro switch held open by a board laying on the switch. When the board floats the alarm is activated. Very failsafe but needs to be manually reset by replacing the board. I believe the sf6 alarm was triggered by a substantial change in gas pressure caused by cooling if the gas so it is good that it stopped alarming as the temperature returned to room temperature.

03 Jul 2022 Sunday 13:34 [Tom Massey] I came in today to check on the acellerator. The Pit below the accelerator has been pumped out. There is still an alarm for high water in the pit. There is still a small leak on the second pump to the right on the main water pumps. This is about a cup/minute now. I was not able to stop it with the valves. The source radiation detector is showing ~38 rad. All Cryopumps are off on the high and low energy sides. The SF6 alarm has stopped..

02 Jul 2022 Saturday 20:55 [Tom Massey] Large water leak was found on the master cooling pumps. A line had pulled loose an water was hosing out. The valves to that section of line have been closed. All pump power was shutoff at the clrcuit box next to the sputter source gate. There is water on the floor and in the Pit. The water temperature was high and shutdown the accelerator. The SF6 alarm is sounding also. The Pit has between 6 and 8 feet of water in it.

22 Jun 2022 Wednesday 13:06 [Tom Massey] The saved settings for pulsing and bunching have been tabulated on a spreadsheet Pulsing_bunching on the desktop of the "Contol" computer.

13 Jun 2022 Monday 16:06 [Tom Massey] The temperature controller on the sputter source was disconnnected from the power and then plugged back in. This reset got rid of the error warning. The temperature controler now works fine.

13 Jun 2022 Monday 09:01 [Tom Massey] I started the sputter source at ~6 PM yesterday. I had ~ 1 microamper when I left. There was a problem with the temperature controller. It now gives and Err 1 on the display. The temperature of the source is 80 degrees and the current 0.184. I have set the source for changing of the target settings: ionizer 10 amp, with the Dell, Target and Extractor off.

27 May 2022 Friday 15:46 [Ingram] The fire alarm went into trouble this morning. I called it in. The issue was the phone line. The cable was being replaced today. Eventually (1~hr later) a technician showed up to reconnect the system. The cable was on back order so the work did not take place last week, as I had been told it would. The system is now normal.

16 May 2022 Monday 08:55 [Zach Meisel] Source cooling water low alarm. Acknowledged at 8:55am.

09 May 2022 Monday 10:51 [carter] Computer and electronics restarted after shutting down for planned 12 hour power outage Saturday night.

09 May 2022 Monday 10:50 [carter] Sputter source low water alarm thresholds re-adjusted to alarm properly when the source cooling water is low.

05 May 2022 Thursday 20:54 [Nisha Singh] The alarm for SPUTTER SORCE LOW FLOW went off, while I was doing an energy change. I called Greg and we noticed that the source had shut down. He suggested to turn the control power on but it automatically turned off and the alarm went off again. We saw that the water level in the source tube was very low. I filled the tube to full and tried to turn on the source twice again but it automatically kept turning off. This time however, the alarm did not go off. Greg said that he will have to check tomorrow why the water cooling is not working. I have shut down the accelerator completely leaving the chopper and buncher on. All the magnet values are saved and turned off.

18 Apr 2022 Monday 10:56 [carter / LeBlanc] Alphatross control computer imaged to new 2 Tb SSD drive and software updates applied. Original drive retired and now running on the new SSD.

14 Apr 2022 Thursday 11:10 [carter / LeBlanc] Alphatross control computer imaged to new 2 Tb SSD drive and software updates applied. Original drive retired and now running on the new SSD.

28 Mar 2022 Monday 11:13 [Leblanc] Reinstalled RF box cover and installed chamber thermal probe. Temperature measurements seem stable now.

28 Mar 2022 Monday 11:06 [Leblanc] Alphatross rebuild complete. Pumped down to 2e-7 over the weekend, although slow to pump initially on Friday. Mineral oil replaced with LOBS for lower viscosity. Steady-state temperature running "water" control 28.8 degrees C (33 degrees C with mineral oil). Plasma was slightly hard to start this morning, but started with additional gas flow and probe voltage. Probe current is very low (0.6 mA). Temperature controllers are also reading incorrect values (-175 +/- 25). Will continue to monitor. Hour monitor was at 18453.7 at source power on.

22 Mar 2022 Tuesday 16:45 [carter] A new Swan camera has been installed for the sputter source, same model that is on the alphatross. The joustick will control the camera position, accessed as "3 cam". The old pre-defined positions have been defined same as the console tag said for the old camera.TEMPS = 1 call, ION/FEED = 2 call, RES I = 3 call, TARGET/EXT = 4 call and GLASSMANS = 5 call. The old position control now is only connected to the swinger camera.

21 Mar 2022 Monday 09:45 [Leblanc] Alphatross source failed with a probe short on Friday, after about a week of running. On inspection, the canal and insulator were covered in Rubidium, and the O-ring was very securely stuck to the end of the bottle. The canal holder was stuck in the mounting flange. Turned on the fluid heater and applied a heat gun, but was unable to get it loose. Cleared the hole with a piece of wire and reassembled with a new o-ring, canal, and insulator. Vacuum was in the 10^-6 range immediately, indicating no significant vacuum leaks. During replacement, the RF leads were not removed from the inductor or the bottle. Heater removed from the electrical circuit, to evaluate maximum fluid temperature without added heat, and without NEC supplied cooling. We added heat because we had freeze-out of Rb on the canal holder, and we thought adding heat to the baffle would help keep the Rb liquid. Perhaps the problem is the opposite, and we need to remove even more heat from the liquid cooled baffle in order to keep the inlet end of the oven cold enough to condense the Rb vapor without allowing it through the inlet hole. See cross section at: https://inpp.ohio.edu/~wiki/handbook/lib/exe/fetch.php?media=ja005110.pdf

11 Mar 2022 Friday 11:55 [carter/LeBlanc] CPU and rear case faans replaced in OUALDAQ machine.

10 Mar 2022 Thursday 05:41 [carter] The control room data logging and accelerator control computer (control1) system disc has been backed up to a new SSD drive and the old IDE drive has been retired to an emergency backup drive and has been left inside the computer.

28 Feb 2022 Monday 11:45 [carter] The tandem computer was imaged to a new 500 GB SSD drive and the old SSD drive has been retired as a backup.

28 Feb 2022 Monday 11:43 [carter] The alphatross control computer was imaged to a new drive and the old drive retired as a backup. After installing the new drive all of the pending centos7 updates were applied. If you observe any unusual behavior with the updated alphatross system, please contact me.

24 Feb 2022 Thursday 15:03 [carter] The new SSD drive on OUALDAQ for /data2 has been installed and the older drive retired as a backup.

21 Feb 2022 Monday 15:23 [Carter, Massey and LeBlanc] Large target room radiation monitor detector checked for calibration and functionality. Checked at 10, 20 and 40 mR and instantaneous shutdown at 100 mR. All functioning properly after detector repair.

21 Feb 2022 Monday 15:20 [carter] Radiation monitor detector for large target room repaired. The connector at the detector was found underwarter and probably arcing to the HV of the ionization detector in the connector. Meter indicating full scale. Connector cleaned and both the electrometer amplifier and the buffer amplifier were replaced. Now functioning properly again. Calibration of the detector will be done.

18 Feb 2022 Friday 12:21 [Leblanc] Magnet primary loop reassembled. Main loop valve is still broken. Disassembled while the water was off, and found the last 1/2" of threads missing from the gate drive screw. Could not see any threads on the gate at all. Chopped the screw shorter and reassembled. Reassembled bypass loop using a hose clamp and an exhaust (U-bolt) clamp to try to prevent another water explosion.

18 Feb 2022 Friday 09:01 [carter] The control room data logging and accelerator control computer (control1) system disc has been backed up to a new SSD drive and the old IDE drive has been retired to an emergency backup drive and has been left inside the computer.

18 Feb 2022 Friday 08:56 [carter] oualdaq, the 8ADC control room data acquisition computer, has been backed up to new SSD disc drive. The new SSD drive is the current system disc and the old IDE drive was retired and left inside the computer as an emergency backup disc. Also, the other drive on that computer, /data2, was backed up to a new SSD drive.

17 Feb 2022 Thursday 16:57 [carter] There was a cooling water leak at the lab this afternoon and one of the connectors for the radiation monitor was soaked by water causing the detector for the large target room to indicate full scale causing a machine shutdown and alarm. The radiation monitor has been turned off to allow the connector to thoroughly dry out. I am on leave tomorrow so I will try to turn it back on Monday, just be aware that the radiation monitor is off-line until then.

16 Feb 2022 Wednesday 04:55 [carter] OUALSS3 (L-15 goni15 implant system) system disc has been imaged to a new 500Gb SSD drive. The currently functional previous drive was retired as emergency backup as of 15 Feb 2022 and was left inside the computer. It seems that the only way to attach the new SSD drive to create the image copy was to select "cable select" on the IDE2SATA adapter, connect the drive to the "secondary" disc channel using the gray connector (first after connector to motherboard). The new drive was recognized as /dev/hdd and /dev/hda was imaged to /dev/hdd (dd if=/dev/hda of=/dev/hdd). The image copy took about 30 hours.

16 Feb 2022 Wednesday 04:37 [carter] Accelerator Lab "Realtime Status" web pages are offline for system disc image backup. Should be back online Wednesday around noon.

13 Feb 2022 Sunday 12:48 [Thomas Massey] Water Hot or Air Low alarm was sounding. The subloop warning light is on. I have silenced the alarm at 12:50 PM.

08 Feb 2022 Tuesday 10:46 [Ingram] It is the utility sub loop temperature that appears to be setting off the sub loops temperature alarm, and not the magnet loop. I have turned the magnet power supplies back on. Greg is working on the utility loop.

08 Feb 2022 Tuesday 08:24 [Ingram] Air/Water alarm going off. Magnet sub loop temp too high. Magnets turned off.

03 Feb 2022 Thursday 14:18 [leblanc] Water still plugged back in and miraculously working again, after sitting idle for a few weeks. Magnet loop primary pump shaft seal failed yesterday. Replaced, but the shaft OD is reduced, so a new seal won't fix the problem. Need replacement shaft, will swap with brand new spare pump next week (pump part number changed old: 1522 new: e-1535). Gate valves on the magnet loop are also sticking, unable to be opened, and leaking when closed. Ball valve on make-up water for magnet primary loop is stuck in the closed position. Utility loop disassembled to repair leaks in copper lines. Repairs in progress.

03 Feb 2022 Thursday 09:30 [Ingram] Source water alarm going off. Source water topped up with two gallons of DI water but it needs more. There is no more distilled water and the still is unplugged, why?

12 Jan 2022 Wednesday 15:00 [carter] Quarterly check console drd accum was 2.25.mR.

03 Jan 2022 Monday 15:29 [Leblanc, Gothberg] Magnet secondary loop was low on water (pump was cavitating occasionally) After some plumbing modifications, we added six (6) gallons of distilled or de-ionized water. This was not enough to cure the cavitation, so enough city water was added to give < 5 PSI at the pump inlet. Filter cartridge on the inlet to the demineralizer was replaced (normally white colored wound bobbin was black), and the housing was cleaned. The pump outlet pressure gauge is cloudy and needs to be replaced.

29 Dec 2021 Wednesday 11:49 [carter] Broken charging voltage 10-turn dial replaced on charging controller.

28 Dec 2021 Tuesday 12:35 [Ingram] I think there is some cavitation audible in the magnet loop water pump.

27 Dec 2021 Monday 11:41 [Tom Massey] I found the souce water low alarm sounding. I added a gallon of distilled deionized water an the loop was full.

17 Dec 2021 Friday 16:01 [ggg] ggg

15 Dec 2021 Wednesday 13:07 [Leblanc, Carter, Gothberg] Alphatross He4 mass flow controller failed on December 14th, while trying to set up for a run for Joseph. Symptoms that the source would repeatedly turn on and off. Eventually the plasma would ignite as well, making the power cycling even more apparent. Eventually Don and I found that the Vacuum OK relay was opening, causing the system to power off, which turned off the He flow, which allowed the vacuum to recover, turning on the helium and repeating the process. Kate and I moved the MFC from He3 to He4, and replaced the He3 with a piece of straight tubing. Ran a brief test to insure operation, and then left the system to pump down. Alicat Scientific model number MC-2SCCM-D/10M Serial Number 176829 Calibrated 5/15/2018. Supposedly lifetime warranty, so I will contact support.

14 Dec 2021 Tuesday 12:06 [carter/leblanc] Additional diagnostics done on the buncher and its HV power supply. Found that removing a filter capacitor that was previously added to the screen supply voltage removed the small (~10% p-p ripple) observed at the RF output of the buncher. A larger filter had been added to the HV (2.5KV) supply and was doing a very good job of removing ripple on that supply. HV supply ripple was very small. The RF and HV supply looks very clean now with respect to 60 Hz ripple. Much better than before. The buncher tubes were also checked and found to be working fine.

13 Dec 2021 Monday 11:44 [carter/leblanc] Additional diagnostics done on the buncher and its HV power supply. Found that removing a filter capacitor that was previously added to the screen supply voltage removed the small (~10% p-p ripple) observed at the RF output of the buncher. A larger filter had been added to the HV (2.5KV) supply and was doing a very good job of removing ripple on that supply. HV supply ripple was very small. The RF and HV supply looks very clean now with respect to 60 Hz ripple. Much better than before. The buncher tubes were also checked and found to be working fine.

09 Dec 2021 Thursday 15:44 [carter/leblanc] Sola constant voltage transformer installed to provide regulated line voltage input to the buncher plate power supply. This will minimize plate voltage changes as a function of building line voltage fluctuations.

08 Dec 2021 Wednesday 15:00 [carter/leblanc] Checked calibration of slit control amplifiers and checked offset between HE and LE slit amplifiers. Gain of the two meters has been calibrated at 100 nA. It should be noted that the HE slit current meter was previously replaced and the replacement meter has a mechanical stop at zero and the meter will not deflect negative. I believe this was a factory modification as the original HE meter would stick at the far negative deflection and not read current, so the factory (or NEC) made a modification to prevent this. The meter in the LE side is an original and it will deflect slightly negative. This causes the two meters to indicate differently at currents less than 10**-9 so that condition should be ignored. As the meters deflect in a positive direction they read correctly and are calibrated at 100 nA. The spare meter we have in the repair parts inventory is the original HE meter with an in-house modification to mechanically stop at zero and should be a good replacement meter.

06 Dec 2021 Monday 09:35 [Leblanc] Added 1 gallon of water to sputter source cooling loop. Still unsure of where the leak might be.

06 Dec 2021 Monday 08:45 [Ingram] Source cooling water alarm is going off, I have silenced it. Workers are here replacing the regulator in the mechanical room upstairs.

16 Nov 2021 Tuesday 12:15 [Leblanc] Alphatross plasma color is off, probe current is high, and pressure is unresponsive to changes in He flow. After running the source for half an hour, plasma extinguished. Going to try replacing the canal and insulator before doing a full rebuild.

09 Nov 2021 Tuesday 10:54 [carter] Modified the SF6 tank volume fixed scale from 32 - 36 bottles to 30 - 38 bottles keeping the midpoint at 34 bottles as it was before.

02 Nov 2021 Tuesday 16:48 [Ingram] Foil check with 2.2 MeV 4He. Good foils found: 43, 44, 46, 47, 48, 49, 50, 51, 54, 57, 58.

28 Oct 2021 Thursday 14:45 [carter/leblanc] Stripper foil "reverse one" switch was found defective and replaced. During the repair, the foil counter was not on and the foil mechanism was run down approximately 10 positions making the foil counter incorrect. The new foil #1 position was determined using the space where no foil hangers were detected by the moving foil position and we believe we have accurately determined foil position 0 and the counter has been reset to indicate the same foil position as before.

27 Oct 2021 Wednesday 09:17 [Ingram] Alphatross shutdown not working. The keyboard will not respond to y. Caps lock is off.

18 Oct 2021 Monday 16:11 [Leblanc] Testing stripper foils using Alphas at 2.2 MeV. LE current approx 600 nA. HE currents as follows: Foil 56 approx 100nA. Foil 57 approx 420nA. Foil 58 approx 40nA. Foil 59 approx 50nA. Foil 60 approx 420nA. Foil 61 approx 380nA. Foil 62 approx 50nA. Foil 63 approx 55nA. Foil 64 aprox 55nA. Foil 65 approx 60nA. Foil 66 aprox 70nA. Foil 77 approx 550nA. Careful tuning may produce better results. Left stripper on position 57.

18 Oct 2021 Monday 15:14 [carter] The phase A,B,C logged voltages are derived from the main power disconnect of the analyzing magnet. When this breaker is off, phase voltages A,B and C are recorded as zero.

14 Oct 2021 Thursday 11:28 [Leblanc] LE Extension ion gauge failed. Will requre venting to atmosphere, regenerating cryopump, roughing and restarting high vacuum pumping. Machine will not be operational again today.

12 Oct 2021 Tuesday 20:53 [leblanc] Added 3 liters of water to the sputter source loop, and the alarm cleared. Perhaps the leak is not yet fixed.

Connection from IP address 44.211.239.1
Time: 2023 Feb 03 7:33:22
Found 2761 logbook entries, displaying most recent 100

Logbook Contents (Most Recent Entries)

27 Jan 2023 Friday 19:36 [Joseph Derkin] Chain stretch alarm went off at 19:21 while taking data. Accelerator was immediately shut down.

27 Jan 2023 Friday 00:31 [Nisha Singh] The chain stretch alarm went off during the run aropund 11:20 pm. The alarm was ackowledged. Greg was called and the accelerator was turned off. When the chain motors were turned off the chain stretch alarm light on E1 panel cleared. Since ereything seemed normal, the accelerator was turned on again and the charging voltage was set to ~4.5 MeV. Withing 15 minutes of the accelerator on, the alarm went off again. After contacting Greg, he advised to put the charging voltage at 0.1 and turn on the accelerator to see if the alarm goes off again. Within 10-15 minutes, the chain stretch alarm went off. So the accelerator was shut down according to shut down protocols. The pulsing and buching, magnets and the steers were all turned down while the source was still left on.

27 Jan 2023 Friday 00:05 [Joseph Derkin] Chain stretch alarm went off at approximately 11:20PM, in the middle of taking data. Alarm was acknowledged on the E1 panel but the indicator light was still on. The chain motors were then turned off, and Greg was called. Greg advised to restart the accelerator, and the chain stretch alarm did not trip again. Greg said it was okay to cautiously resume data taking.

25 Jan 2023 Wednesday 21:58 [Joseph Derkin] Accelerator shutdown module shut down the accelerator at ~21:35 on Wednesday January 25. E2 alarm tripped, sub loops temp warning light was on; unitility loop light engaged in the vault. Per Greg's direction, we are leaving the control power off over night and he will investigate in the morning.

19 Jan 2023 Thursday 13:07 [Tom Massey] We had a spark when condintioning the column. We had no excursions on the LE vacuum up to 4.5 MV. When we went to 4.550 MV we had an excursion and a spark. We will wait 10 minutes and try again.

18 Jan 2023 Wednesday 13:54 [Leblanc et. al.] Tank spark today caused E1 alarm panel to light up. After reset and shutdown, E1 input 9 (chain stretch) was stuck in latched ON. Chain stretch switch was open, indicating that the fault is in the E1 panel circuitry. Moved chain stretch alarm to input 10. Will verify chain stretch switch at next tank opening. Cleared operators to resume operation.

18 Jan 2023 Wednesday 09:29 [Bikash Chauhan] Ion gauge under stairs requires a change of filament. Currently, we are using backup filament.

09 Jan 2023 Monday 15:07 [Leblanc, Carter, Gothberg] Quarterly Safety Checks completed by Leblanc, Carter, and Gothberg. Operator DRD accumulated dose: 0.24mR, 2nd DRD accumulated dose: 0.00 mR.

03 Jan 2023 Tuesday 11:09 [Ingram] Energy calibration checks have been done with elastic scattering of alphas by oxygen at 3.035 MeV, 5.139 and 5.375 MeV where there are obvious resonances. The scattering angle was 168 degrees. The energy was determined by the NMR in the usual way via the analyzing magnet. For both 3.035 and 5.375 the energy determined by the NMR setting may be up to 5 keV low. Both of these resonances are narrow enough to detect this but the energy increments used were 5 keV. Also, it likely that the energy resolution with all the slits at 0.030" is not less than 5 keV. My conclusions is that the energy calibration of the machine has not been significantly affected by the flood.

03 Jan 2023 Tuesday 10:56 [Ingram] Recent tests of the Alphatross have indicated that currently 90 V is the best voltage at which to operate the oven. The output will increase about 20% by increasing the voltage to 95V. This is much less than the increase from 85 V to 90 V. There is no benefit to operating above 100V. The oven temperature is not a reliable measure in terms of the output. It varies over a few minutes by 5-7 deg C. Is this rf noise? Work with the source over about a month has seen the LE cup output drop from 900 nA to about 250nA .This is with the insert at a depth of 0.025". This was the highest output seen as we increased the depth.

21 Dec 2022 Wednesday 10:50 [Leblanc, Carter] Oven temp readings very erratic with the RF on. We added 3 ferrites near the controller, and 2 near the oven at a safe distance from the heat. Tightened the terminal screws holding the wires in the connector at the controller. Unplugged the ground on the shield from the controller. Readings seem steady so far.

21 Dec 2022 Wednesday 09:33 [Ingram] Alphatross oven temp is reading very negative with the rf on.

08 Dec 2022 Thursday 15:07 [Joseph Derkin] E1 alarm tripped at ~ 14:45, under "Water hot or air low" message. Greg inspected main loop temp and receiver/line pressure. 2-3 minutes later E2 module tripped and E1 with "water hot or air low". Accelerator shutdown. Magnet loop warm.

25 Nov 2022 Friday 16:29 [Tom Massey] I found the alarms soudning when I was in the Lab. The AIR/WATER interlock had tripped the alarm. I reset the Shutdown alarm and the leftmost E1 alarm "Water Hot or Pressure Low". The plots of the temperature and pressure readings do not show any excursions.

23 Nov 2022 Wednesday 14:46 [Leblanc] Process chiller repair notes, various dates. We had a solenoid coil pack fail on compressor #1 (largest compressor). This caused circuit 3 not to run, and eventually caused us to blow fuses on the control transformer, which is how we eventually found the problem. With the coil replaced and the cutout switch reset, compressor #1 was found to be short cycling, even when the main controller was not calling for any cooling. Troubleshooting eventually found that one set of contacts on the control relay had welded, causing that compressor to stay on continuously. This was probably caused when the coil pack gradually failed and drew more and more current. Currently compressor #1 is disabled by removing the control relay until a replacement can be obtained. Relay PN is 55.34.8.240.0000 and they are available from Newark. Steve from Professional Refrigeration & A/C was on-site to assist with troubleshooting and repair. Additionally, the freeze protection thermostat probe wires for compressors 1 and 3 were found to have been cut, probably by a string trimmer. The units will display "EP" when the probe has failed or the wire is cut. They are currently patched with wire nuts, but running them through some liquid-tight conduit would be a safer solution, and will be done as weather and time permit.

17 Nov 2022 Thursday 10:26 [Ingram] Generator test this morning

16 Nov 2022 Wednesday 09:00 [Ingram] Tritium alarm and the soutter source low flow alarm both going off. No obvious reason. Rest the tritium. Source low flow silenced. BTW this keyboard at the control desk has no lights except the Fn key which is flashing,

07 Nov 2022 Monday 21:06 [Ingram] Alphatross testing continued. The source is being run under the conditions in the handbook except the oven voltage is 115 V. The output of the source does not seem to depend strongly on the oven voltage. I have varied the voltage from 100 V to 120 V. The oven temperature was 177 deg F after 20 minutes at 115 V. After two hours the temperature was 179 deg F but had been varying +/- 3 deg F. The temperature of the oven varies randomly with very short periods. Is this caused by RF pickup? The output of the source at the LE cup does increase slowly for about two hours after turning the source on with the oven at 115 V. This follows the slow change/increase in the temperature of the chamber. There is black plastic over the side away from the camera to reduce the air flow from the HVAC affecting the temperature of the oven. The HVAC operation does affect the output of the source as noted in the winter of 2020/21. That variation takes 20 minutes or so. Reducing the gas flow from 0.35 sccm to about 0.20 sccm does increase the source output by about a factor of two. The latest test was on November 3, 2022 with the BN insert drilled out by 0.025''. This gave close to 1 uA in the LE cup. The LE cup current has been increasing as we have increased the depth of the drilling of the BN insert. The probe current is now over 2 mA. But does not change at the same rate as current in the LE cup. The next test will be with an insert drill out to 0.030''.

07 Nov 2022 Monday 19:11 [Ingram] Foil check November 3, 2022. Using 2.2 MeV He++ with about 1uA in the LE cup the following foils are rated as good. The current in the HE cup was about 1 uA for the good foils. Other foils had zero to 0.3 uA. Foils 43, 44, 46, 47, 48, 49, 50, 51, 54, 57. Foil 43 is 2 ug/cm2, the rest are 5 ug/cm2. This is similar to what we last year at this time.

07 Nov 2022 Monday 09:44 [ Leblanc] Alarm in control room was SF6 monitor. Tank volume looked constant over 1000 points. Full month plots fluctute by a full bottle (roughly 30.5 min, 31.5 max). Full year data shows a steady drop in volume, approximately 1 bottle per year. Will do another leak check.

07 Nov 2022 Monday 09:18 [Ingram] Loud beeping noise in the control room. Probably a UPS near the SF6 pressure monitor. I have to go to class.

06 Nov 2022 Sunday 16:46 [Ingram] Source cooling water low. It will need to be filled before running tomorrow.

04 Nov 2022 Friday 14:14 [carter/massey] Swinger to tweaker ratio for deuterons ? 174.295 / 7.3744 = 23.635

27 Oct 2022 Thursday 09:50 [Ingram] Generator testing

18 Oct 2022 Tuesday 07:05 [carter] The switcher magnet power supply should now be able to provide up to 120 Amps to the switcher magnet. Experiments that require less than 120 Amps on the switcher magnet should be able to run. The stability of the 2-supply operation looks good and was tested up to 75 Amps. To avoid unnecessarily stressing the system, operation at higher currents will be done when there is an intent to use the higher currents, but no known issues exist that would prevent operation to 120 Amps. Because of the recently discovered fact that the switcher magnet measured current was was reading low (0.76) of the actual value, and we are now indicating the "actual" switcher current, the "magnet predictor" value for the switcher current needed for a particular beam and energy will need to multiplied by 1.315 to determine the estimated actual current now needed from the switcher power supply.

18 Oct 2022 Tuesday 06:49 [carter/leblanc] A second 60 Amp power supply was added as a "slave" to the original 60 Amp supply we are using for the switcher magnet power supply. The control of the magnets is still done using the "switcher 60" control window. This computer window will display 1/2 the actual magnet current when the second power supply is enabled. This was done to preserve the more precise "setability" (minimal stepsize) of the switcher 60 control window but since there are 2 supplies in parallel, the actual current is twice the setpoint current. The analog panel meter and the logging systems will display and record the "actual" magnet current. The power supply console panel indicates these changes with new labeling.

14 Oct 2022 Friday 09:55 [Joseph Derkin] Quarterly check: user DRD accumulated dose is 0.0 mR/h, operator DRD accumulated dose is 0.13 mR/h

12 Oct 2022 Wednesday 15:56 [carter] Repaired pit O2 monitor has been installed and seems to be operating correctly again.

09 Oct 2022 Sunday 19:45 [Ingram] Notes on operating the Alphatross 3-Oct-22 Started in the morning, 9:00 AM After 3 hours with oven at 80 V, T_oven 152 After 20 min at 85 V T_oven 154.5 After 2 hours at 90 V, oven varying between 156 and 158 Took Lens A to 14 kV from 10 kV and doubled beam in LE cup 2:30 PM reduced oven to 85 V current LE cup at 150 nA Drop in 5 seconds to 110 nA but temperature did not change. Voltage did in plot. 2:50 PM temp has now dropped to 155 Oven back to 90 V, current back up in less than a minute 3:10 PM current LE cup 150 nA temp 157 Shutdown, will add draught excluder tomorrow 4-Oct-22 Black plastic sheet added on side of source away from camera Started source oven to 80V, 9:15 AM 9:46 AM oven at 152 degC 9:52 AM oven at 156 degC 10:04 AM oven at 158 degC beam current rising slowly now at 75 nA, lens A peak 12 kV 10:26 AM oven at 156-158 on plot LE cup 75 nA, 10:44 AM oven at 156 oven to 85 V LE cup 75 nA 10:45 AM oven at 157 LE cup 90 nA 10:47 AM oven at 158 LE cup 100 nA 11:12 AM oven at 160 LE cup 120 nA, oven to 90 V 11:32 AM oven at 162 LE cup 160 nA current wandering up and down 20 nA, oven to 95 V Notes that old Rb heater was 75 V 1.04 A or 72.1 ohms, new heater is 96 V at 1.19 A or 80.7 ohms. Therefore, need more voltage for the same power. 11:38 AM oven at 164 LE cup 210 nA 11:56 AM oven at 164 LE cup 250 nA 12:22 PM oven at 165 LE cup 250 nA wandering up to 280 nA down to 220 nA, oven to 97.5 V 12:28 PM oven at 166 deg C LE cup 300 nA oven to 100 V 12:32 PM oven at 167 deg C LE cup 350 nA, less wobbly 1:54 PM oven at 169 deg C LE cup 380 nA oven to 105 V 2:27 PM oven at 171.6 LE cup 400 nA 2.2 MeV 4 nA on target oven to 107.5 V 2:43 PM oven to 110 V target current 4.5 nA 3:02 PM oven at 174 deg C, oven to 115 V, LE cup 250 nA, refocus to 400 nA LE cup, then 400 nA HE cup 3:23 PM oven to 120 V 3:32 PM oven at 181 deg C no increase in target current 4nA or current in LE cup 400 nA when refocused.

04 Oct 2022 Tuesday 09:35 [Ingram] Draught excluder put on to side of Alphatross away from camera

03 Oct 2022 Monday 16:38 [carter] Alphatross source camera lost color, looked black and white only. Power cycled the camera and now has normal color picture.

27 Sep 2022 Tuesday 13:39 [Ingram] Fixed detector in STR moved to end of L30.

27 Sep 2022 Tuesday 13:20 [Leblanc, Ingram] Fixed detector in small target room moved to end of L30 beamline.

26 Sep 2022 Monday 08:35 [carter] Process chiller is down, probably since about 2:00 AM.

23 Sep 2022 Friday 11:39 [carter/leblanc] 24 VDC power supply that supplies DC power for console panel lighting failed. The power supply has been replaced and console lights working again. This power supply is located in the control-power main circuit breaker switchgear.

21 Sep 2022 Wednesday 10:06 [carter/leblanc] Phase voltage logging has been restored.

15 Sep 2022 Thursday 12:05 [carter] Lens A test and calibration. Panel meter 5KV, actual 5.420KV; panel meter 10KV, actual 10.820KV; panel meter 15 KV, actual 16.290 KV.

05 Sep 2022 Monday 15:40 [Ingram] HVAC dripping water on the floor from its pipes in LTR, again. Cable tray dry.

04 Sep 2022 Sunday 11:18 [Ingram] The water has been pumped out of the LTR cable tray. I think the water level detector has been reset. Greg has identified the failure and will work on fixing it next week. The vacuum and utility loops are still running. We should be able to test an ion source next week just with the secondary magnet loop running.

04 Sep 2022 Sunday 07:54 [Ingram] Water leak again, cable tray in LTR about full. Magnet loop fitting failed. Magnet loop isolated and pump shut off. I have left the vacuum and utility loops running.

17 Aug 2022 Wednesday 16:47 [carter] In the process of replacing the damaged magnet power supplies it was noticed that the currents displayed by the HVEC panel meters were not accurate compared to a Weston 500A 50 mV meter shunt. The old switcher was indicating 76 % of the actual current (displayed 76 amps at 100 amps as read by the shunt). The old analyzer was indicating about 105 % (displayed 105 amps at 100 amps as read by the shunt). The inflection supply was indicating 85 % of the actual current (displayed 0.85 amps at 1.00 amps as measured by the new Keysight supply).

03 Jul 2022 Sunday 16:32 [Carter] Not a surprise but heads up, the pit O2 monitor is not operational.

03 Jul 2022 Sunday 14:34 [Carter] I meant pit high water, not source high water in previous post.

03 Jul 2022 Sunday 14:33 [Carter] The source high water alarm will not reset automatically. It consists of a micro switch held open by a board laying on the switch. When the board floats the alarm is activated. Very failsafe but needs to be manually reset by replacing the board. I believe the sf6 alarm was triggered by a substantial change in gas pressure caused by cooling if the gas so it is good that it stopped alarming as the temperature returned to room temperature.

03 Jul 2022 Sunday 13:34 [Tom Massey] I came in today to check on the acellerator. The Pit below the accelerator has been pumped out. There is still an alarm for high water in the pit. There is still a small leak on the second pump to the right on the main water pumps. This is about a cup/minute now. I was not able to stop it with the valves. The source radiation detector is showing ~38 rad. All Cryopumps are off on the high and low energy sides. The SF6 alarm has stopped..

02 Jul 2022 Saturday 20:55 [Tom Massey] Large water leak was found on the master cooling pumps. A line had pulled loose an water was hosing out. The valves to that section of line have been closed. All pump power was shutoff at the clrcuit box next to the sputter source gate. There is water on the floor and in the Pit. The water temperature was high and shutdown the accelerator. The SF6 alarm is sounding also. The Pit has between 6 and 8 feet of water in it.

22 Jun 2022 Wednesday 13:06 [Tom Massey] The saved settings for pulsing and bunching have been tabulated on a spreadsheet Pulsing_bunching on the desktop of the "Contol" computer.

13 Jun 2022 Monday 16:06 [Tom Massey] The temperature controller on the sputter source was disconnnected from the power and then plugged back in. This reset got rid of the error warning. The temperature controler now works fine.

13 Jun 2022 Monday 09:01 [Tom Massey] I started the sputter source at ~6 PM yesterday. I had ~ 1 microamper when I left. There was a problem with the temperature controller. It now gives and Err 1 on the display. The temperature of the source is 80 degrees and the current 0.184. I have set the source for changing of the target settings: ionizer 10 amp, with the Dell, Target and Extractor off.

27 May 2022 Friday 15:46 [Ingram] The fire alarm went into trouble this morning. I called it in. The issue was the phone line. The cable was being replaced today. Eventually (1~hr later) a technician showed up to reconnect the system. The cable was on back order so the work did not take place last week, as I had been told it would. The system is now normal.

16 May 2022 Monday 08:55 [Zach Meisel] Source cooling water low alarm. Acknowledged at 8:55am.

09 May 2022 Monday 10:51 [carter] Computer and electronics restarted after shutting down for planned 12 hour power outage Saturday night.

09 May 2022 Monday 10:50 [carter] Sputter source low water alarm thresholds re-adjusted to alarm properly when the source cooling water is low.

05 May 2022 Thursday 20:54 [Nisha Singh] The alarm for SPUTTER SORCE LOW FLOW went off, while I was doing an energy change. I called Greg and we noticed that the source had shut down. He suggested to turn the control power on but it automatically turned off and the alarm went off again. We saw that the water level in the source tube was very low. I filled the tube to full and tried to turn on the source twice again but it automatically kept turning off. This time however, the alarm did not go off. Greg said that he will have to check tomorrow why the water cooling is not working. I have shut down the accelerator completely leaving the chopper and buncher on. All the magnet values are saved and turned off.

18 Apr 2022 Monday 10:56 [carter / LeBlanc] Alphatross control computer imaged to new 2 Tb SSD drive and software updates applied. Original drive retired and now running on the new SSD.

14 Apr 2022 Thursday 11:10 [carter / LeBlanc] Alphatross control computer imaged to new 2 Tb SSD drive and software updates applied. Original drive retired and now running on the new SSD.

28 Mar 2022 Monday 11:13 [Leblanc] Reinstalled RF box cover and installed chamber thermal probe. Temperature measurements seem stable now.

28 Mar 2022 Monday 11:06 [Leblanc] Alphatross rebuild complete. Pumped down to 2e-7 over the weekend, although slow to pump initially on Friday. Mineral oil replaced with LOBS for lower viscosity. Steady-state temperature running "water" control 28.8 degrees C (33 degrees C with mineral oil). Plasma was slightly hard to start this morning, but started with additional gas flow and probe voltage. Probe current is very low (0.6 mA). Temperature controllers are also reading incorrect values (-175 +/- 25). Will continue to monitor. Hour monitor was at 18453.7 at source power on.

22 Mar 2022 Tuesday 16:45 [carter] A new Swan camera has been installed for the sputter source, same model that is on the alphatross. The joustick will control the camera position, accessed as "3 cam". The old pre-defined positions have been defined same as the console tag said for the old camera.TEMPS = 1 call, ION/FEED = 2 call, RES I = 3 call, TARGET/EXT = 4 call and GLASSMANS = 5 call. The old position control now is only connected to the swinger camera.

21 Mar 2022 Monday 09:45 [Leblanc] Alphatross source failed with a probe short on Friday, after about a week of running. On inspection, the canal and insulator were covered in Rubidium, and the O-ring was very securely stuck to the end of the bottle. The canal holder was stuck in the mounting flange. Turned on the fluid heater and applied a heat gun, but was unable to get it loose. Cleared the hole with a piece of wire and reassembled with a new o-ring, canal, and insulator. Vacuum was in the 10^-6 range immediately, indicating no significant vacuum leaks. During replacement, the RF leads were not removed from the inductor or the bottle. Heater removed from the electrical circuit, to evaluate maximum fluid temperature without added heat, and without NEC supplied cooling. We added heat because we had freeze-out of Rb on the canal holder, and we thought adding heat to the baffle would help keep the Rb liquid. Perhaps the problem is the opposite, and we need to remove even more heat from the liquid cooled baffle in order to keep the inlet end of the oven cold enough to condense the Rb vapor without allowing it through the inlet hole. See cross section at: https://inpp.ohio.edu/~wiki/handbook/lib/exe/fetch.php?media=ja005110.pdf

11 Mar 2022 Friday 11:55 [carter/LeBlanc] CPU and rear case faans replaced in OUALDAQ machine.

10 Mar 2022 Thursday 05:41 [carter] The control room data logging and accelerator control computer (control1) system disc has been backed up to a new SSD drive and the old IDE drive has been retired to an emergency backup drive and has been left inside the computer.

28 Feb 2022 Monday 11:45 [carter] The tandem computer was imaged to a new 500 GB SSD drive and the old SSD drive has been retired as a backup.

28 Feb 2022 Monday 11:43 [carter] The alphatross control computer was imaged to a new drive and the old drive retired as a backup. After installing the new drive all of the pending centos7 updates were applied. If you observe any unusual behavior with the updated alphatross system, please contact me.

24 Feb 2022 Thursday 15:03 [carter] The new SSD drive on OUALDAQ for /data2 has been installed and the older drive retired as a backup.

21 Feb 2022 Monday 15:23 [Carter, Massey and LeBlanc] Large target room radiation monitor detector checked for calibration and functionality. Checked at 10, 20 and 40 mR and instantaneous shutdown at 100 mR. All functioning properly after detector repair.

21 Feb 2022 Monday 15:20 [carter] Radiation monitor detector for large target room repaired. The connector at the detector was found underwarter and probably arcing to the HV of the ionization detector in the connector. Meter indicating full scale. Connector cleaned and both the electrometer amplifier and the buffer amplifier were replaced. Now functioning properly again. Calibration of the detector will be done.

18 Feb 2022 Friday 12:21 [Leblanc] Magnet primary loop reassembled. Main loop valve is still broken. Disassembled while the water was off, and found the last 1/2" of threads missing from the gate drive screw. Could not see any threads on the gate at all. Chopped the screw shorter and reassembled. Reassembled bypass loop using a hose clamp and an exhaust (U-bolt) clamp to try to prevent another water explosion.

18 Feb 2022 Friday 09:01 [carter] The control room data logging and accelerator control computer (control1) system disc has been backed up to a new SSD drive and the old IDE drive has been retired to an emergency backup drive and has been left inside the computer.

18 Feb 2022 Friday 08:56 [carter] oualdaq, the 8ADC control room data acquisition computer, has been backed up to new SSD disc drive. The new SSD drive is the current system disc and the old IDE drive was retired and left inside the computer as an emergency backup disc. Also, the other drive on that computer, /data2, was backed up to a new SSD drive.

17 Feb 2022 Thursday 16:57 [carter] There was a cooling water leak at the lab this afternoon and one of the connectors for the radiation monitor was soaked by water causing the detector for the large target room to indicate full scale causing a machine shutdown and alarm. The radiation monitor has been turned off to allow the connector to thoroughly dry out. I am on leave tomorrow so I will try to turn it back on Monday, just be aware that the radiation monitor is off-line until then.

16 Feb 2022 Wednesday 04:55 [carter] OUALSS3 (L-15 goni15 implant system) system disc has been imaged to a new 500Gb SSD drive. The currently functional previous drive was retired as emergency backup as of 15 Feb 2022 and was left inside the computer. It seems that the only way to attach the new SSD drive to create the image copy was to select "cable select" on the IDE2SATA adapter, connect the drive to the "secondary" disc channel using the gray connector (first after connector to motherboard). The new drive was recognized as /dev/hdd and /dev/hda was imaged to /dev/hdd (dd if=/dev/hda of=/dev/hdd). The image copy took about 30 hours.

16 Feb 2022 Wednesday 04:37 [carter] Accelerator Lab "Realtime Status" web pages are offline for system disc image backup. Should be back online Wednesday around noon.

13 Feb 2022 Sunday 12:48 [Thomas Massey] Water Hot or Air Low alarm was sounding. The subloop warning light is on. I have silenced the alarm at 12:50 PM.

08 Feb 2022 Tuesday 10:46 [Ingram] It is the utility sub loop temperature that appears to be setting off the sub loops temperature alarm, and not the magnet loop. I have turned the magnet power supplies back on. Greg is working on the utility loop.

08 Feb 2022 Tuesday 08:24 [Ingram] Air/Water alarm going off. Magnet sub loop temp too high. Magnets turned off.

03 Feb 2022 Thursday 14:18 [leblanc] Water still plugged back in and miraculously working again, after sitting idle for a few weeks. Magnet loop primary pump shaft seal failed yesterday. Replaced, but the shaft OD is reduced, so a new seal won't fix the problem. Need replacement shaft, will swap with brand new spare pump next week (pump part number changed old: 1522 new: e-1535). Gate valves on the magnet loop are also sticking, unable to be opened, and leaking when closed. Ball valve on make-up water for magnet primary loop is stuck in the closed position. Utility loop disassembled to repair leaks in copper lines. Repairs in progress.

03 Feb 2022 Thursday 09:30 [Ingram] Source water alarm going off. Source water topped up with two gallons of DI water but it needs more. There is no more distilled water and the still is unplugged, why?

12 Jan 2022 Wednesday 15:00 [carter] Quarterly check console drd accum was 2.25.mR.

03 Jan 2022 Monday 15:29 [Leblanc, Gothberg] Magnet secondary loop was low on water (pump was cavitating occasionally) After some plumbing modifications, we added six (6) gallons of distilled or de-ionized water. This was not enough to cure the cavitation, so enough city water was added to give < 5 PSI at the pump inlet. Filter cartridge on the inlet to the demineralizer was replaced (normally white colored wound bobbin was black), and the housing was cleaned. The pump outlet pressure gauge is cloudy and needs to be replaced.

29 Dec 2021 Wednesday 11:49 [carter] Broken charging voltage 10-turn dial replaced on charging controller.

28 Dec 2021 Tuesday 12:35 [Ingram] I think there is some cavitation audible in the magnet loop water pump.

27 Dec 2021 Monday 11:41 [Tom Massey] I found the souce water low alarm sounding. I added a gallon of distilled deionized water an the loop was full.

17 Dec 2021 Friday 16:01 [ggg] ggg

15 Dec 2021 Wednesday 13:07 [Leblanc, Carter, Gothberg] Alphatross He4 mass flow controller failed on December 14th, while trying to set up for a run for Joseph. Symptoms that the source would repeatedly turn on and off. Eventually the plasma would ignite as well, making the power cycling even more apparent. Eventually Don and I found that the Vacuum OK relay was opening, causing the system to power off, which turned off the He flow, which allowed the vacuum to recover, turning on the helium and repeating the process. Kate and I moved the MFC from He3 to He4, and replaced the He3 with a piece of straight tubing. Ran a brief test to insure operation, and then left the system to pump down. Alicat Scientific model number MC-2SCCM-D/10M Serial Number 176829 Calibrated 5/15/2018. Supposedly lifetime warranty, so I will contact support.

14 Dec 2021 Tuesday 12:06 [carter/leblanc] Additional diagnostics done on the buncher and its HV power supply. Found that removing a filter capacitor that was previously added to the screen supply voltage removed the small (~10% p-p ripple) observed at the RF output of the buncher. A larger filter had been added to the HV (2.5KV) supply and was doing a very good job of removing ripple on that supply. HV supply ripple was very small. The RF and HV supply looks very clean now with respect to 60 Hz ripple. Much better than before. The buncher tubes were also checked and found to be working fine.

13 Dec 2021 Monday 11:44 [carter/leblanc] Additional diagnostics done on the buncher and its HV power supply. Found that removing a filter capacitor that was previously added to the screen supply voltage removed the small (~10% p-p ripple) observed at the RF output of the buncher. A larger filter had been added to the HV (2.5KV) supply and was doing a very good job of removing ripple on that supply. HV supply ripple was very small. The RF and HV supply looks very clean now with respect to 60 Hz ripple. Much better than before. The buncher tubes were also checked and found to be working fine.

09 Dec 2021 Thursday 15:44 [carter/leblanc] Sola constant voltage transformer installed to provide regulated line voltage input to the buncher plate power supply. This will minimize plate voltage changes as a function of building line voltage fluctuations.

08 Dec 2021 Wednesday 15:00 [carter/leblanc] Checked calibration of slit control amplifiers and checked offset between HE and LE slit amplifiers. Gain of the two meters has been calibrated at 100 nA. It should be noted that the HE slit current meter was previously replaced and the replacement meter has a mechanical stop at zero and the meter will not deflect negative. I believe this was a factory modification as the original HE meter would stick at the far negative deflection and not read current, so the factory (or NEC) made a modification to prevent this. The meter in the LE side is an original and it will deflect slightly negative. This causes the two meters to indicate differently at currents less than 10**-9 so that condition should be ignored. As the meters deflect in a positive direction they read correctly and are calibrated at 100 nA. The spare meter we have in the repair parts inventory is the original HE meter with an in-house modification to mechanically stop at zero and should be a good replacement meter.

06 Dec 2021 Monday 09:35 [Leblanc] Added 1 gallon of water to sputter source cooling loop. Still unsure of where the leak might be.

06 Dec 2021 Monday 08:45 [Ingram] Source cooling water alarm is going off, I have silenced it. Workers are here replacing the regulator in the mechanical room upstairs.

16 Nov 2021 Tuesday 12:15 [Leblanc] Alphatross plasma color is off, probe current is high, and pressure is unresponsive to changes in He flow. After running the source for half an hour, plasma extinguished. Going to try replacing the canal and insulator before doing a full rebuild.

09 Nov 2021 Tuesday 10:54 [carter] Modified the SF6 tank volume fixed scale from 32 - 36 bottles to 30 - 38 bottles keeping the midpoint at 34 bottles as it was before.

02 Nov 2021 Tuesday 16:48 [Ingram] Foil check with 2.2 MeV 4He. Good foils found: 43, 44, 46, 47, 48, 49, 50, 51, 54, 57, 58.

28 Oct 2021 Thursday 14:45 [carter/leblanc] Stripper foil "reverse one" switch was found defective and replaced. During the repair, the foil counter was not on and the foil mechanism was run down approximately 10 positions making the foil counter incorrect. The new foil #1 position was determined using the space where no foil hangers were detected by the moving foil position and we believe we have accurately determined foil position 0 and the counter has been reset to indicate the same foil position as before.

27 Oct 2021 Wednesday 09:17 [Ingram] Alphatross shutdown not working. The keyboard will not respond to y. Caps lock is off.

18 Oct 2021 Monday 16:11 [Leblanc] Testing stripper foils using Alphas at 2.2 MeV. LE current approx 600 nA. HE currents as follows: Foil 56 approx 100nA. Foil 57 approx 420nA. Foil 58 approx 40nA. Foil 59 approx 50nA. Foil 60 approx 420nA. Foil 61 approx 380nA. Foil 62 approx 50nA. Foil 63 approx 55nA. Foil 64 aprox 55nA. Foil 65 approx 60nA. Foil 66 aprox 70nA. Foil 77 approx 550nA. Careful tuning may produce better results. Left stripper on position 57.

18 Oct 2021 Monday 15:14 [carter] The phase A,B,C logged voltages are derived from the main power disconnect of the analyzing magnet. When this breaker is off, phase voltages A,B and C are recorded as zero.

14 Oct 2021 Thursday 11:28 [Leblanc] LE Extension ion gauge failed. Will requre venting to atmosphere, regenerating cryopump, roughing and restarting high vacuum pumping. Machine will not be operational again today.

12 Oct 2021 Tuesday 20:53 [leblanc] Added 3 liters of water to the sputter source loop, and the alarm cleared. Perhaps the leak is not yet fixed.