Time: 2023 Oct 02 23:16:00
Found 2806 logbook entries, displaying most recent 100
Logbook Contents (Most Recent Entries)
02 Oct 2023 Monday 15:15 [Ingram] Vacuum failure between the analyzer and the switcher. It has affected the LE cryopumps. All pumps regenerating.
15 Sep 2023 Friday 17:00 [carter] The inflection magnet power supply has been moved from the vault to the small target room with the other power supplies. The inflection magnet polarity is currently set for Alphas, For hopefully a short period, the polarity needs to be switched manually. Contact Don or Greg before you run if it needs to be changed.
15 Sep 2023 Friday 10:30 [carter] Control1 image backup complete and web services restored.
14 Sep 2023 Thursday 10:34 [carter] Because of the many modifications to the accelerator control computer to implement the new Heinzinger power supplies (control1), I am planning on doing an image backup of the system starting this afternoon and will probably last overnight. The control1 computer will not be available over this time, likely done sometime tomorrow AM. Since the computer will be in single user mode for the backup, some OUAL webpages (eg. realtime logging, handbook, etc.) will be unavailable until this has finished. If this will be a problem for anyone, try to let me know by 3:00 PM today, otherwise I will start the backup.
06 Sep 2023 Wednesday 11:56 [carter/leblanc] Quad1A transient response has been adjusted and now is much more stable. Still can be made to oscillate on large jumps, like the others. Tolerates much quicker movement than before though.
06 Sep 2023 Wednesday 11:53 [carter/leblanc] All dipole magnets are now connected to the new Heinzinger power supplies. Restart buttons have been modified to start the Heinzinger control software, Polarity switching is done using the "Deflection" button to toggle the magnet polarity. Deflection direction is reported on the "Magnet Current" line of the software. Report any problems to don. The only analog panel meter that is connected is the switcher. Currently no analog meter on the analyzer of the swinger.
21 Aug 2023 Monday 19:49 [Joseph Derkin] Glassman power supplies not turning on for Cs sputter source after pellet installation. I ensured that both HV source doors were closed and the indicator lights were on. I tried the "boost" button with no success. Greg suggested that I try leaving the HV source door open for several minutes to let the solonoid cool down, and this also did not work.
17 Aug 2023 Thursday 16:16 [carter/leblanc] Alphatross performance after leak checking 4He plumbing and replacing one small section of plastic plumbing resulted in 10 nA of oxygen and 550 nA of 4He beam.
17 Aug 2023 Thursday 12:45 [carter] A "Fine" terminal voltage adjustment control has been added to the NEC Terminal Potential Stabilizer that allows very fine adjustments to tne "Terminal Voltage" control with a full range of 1.5 KV. This control is labeled "Fine" and is located coaxial to the "Bias Current" control.
15 Aug 2023 Tuesday 17:31 [carter] We are now using the new Heinzinger magnet power supplies for both the analyzing magnet and the switching magnet, a dedicated power supply for each magnet. Polarity switching is handled in the software GUI using the "Deflection" button. The old HVEC magnet power supply is now dedicated to the swinger magnet. We are no longer using the large polarity switch located by the switcher nor are we using the "Null" circuit breaker located by the analyzing magnet. The old HVEC magnet supply we were using for the analyzer/swinger should not be switched from the SWING position and is only used to power the swinger magnet now.. New instructions will be written for the accelerator handbook but until then, see Don or Greg for magnet power supply instruction and setup.
14 Aug 2023 Monday 14:59 [Leblanc] Installed 0.032 inch canal and insulator. Increased probe voltage by 125V every 5 seconds to 6kV. No initial spike in probe current. Probe current at 2.5mA when probe reached 6kV. After 20 minutes, probe current rose to 3.5 to 3.6mA.
14 Aug 2023 Monday 13:00 [Leblanc] Insulator and canal combination of 0.024 inches resulted in very high initial probe currents. Peak was over 6.5mA. Steady state reached in about 5 minutes of 2.5 to 2.75 mA. Replaced with 0.029 inch gap insulator and canal combination. Again high currents observed initially. Current decayed to 2.0 to 2.5 mA after about 5 minutes.
14 Aug 2023 Monday 10:45 [Leblanc] Alphatross testing continues. Friday installed new canal and insulator with gap measured at 0.004 inches. Initial probe current around 1.85mA which decayed to 1.4mA after 20 minutes. Increased magnet current to 4.5A which resulted in an increase in probe current to 1.55mA. Still below target of 2.0mA. Replaced with canal and insulator gap measured at 0.024 inches.
08 Aug 2023 Tuesday 07:40 [carter] The Accelerator Handbook WIKI now contains a section for dipole magnet setup instructions. The instructions are contained on the Accelerator Start-up page, section 5. titled "Dipole Magnet Setup Instructions".
01 Aug 2023 Tuesday 17:18 [Leblanc] Many VESDA warnings last night, almost exclusively Minor low air flow pipe 2 on the DOCK VLS. Disconnected this pipe and cleaned with the shop vac. Cleaned the pipes on the control room VESDA in the mechanical room. This required removing the pipe clamps holding the conduit in place. Set off the fire alarm doing this, but it was in local-only mode so fire department visit. I suspect that the excessive levels of dust in the mechanical room got stirred up either when turning on the shopvac or when disconnecting the pipe. Try to remember to clean up around the vesda before working on these pipes next time.
26 Jul 2023 Wednesday 11:54 [carter] Terminal potential stabilizer repaired. Likely cause was a terminal spark to the corona points that caused the failure of IC11, an OP-14 OP Amp in the Corona Triode Control board located at the tank in the Corona Probe Controller assembly.
25 Jul 2023 Tuesday 17:33 [carter] While changing energy, terminal was observed to go from ~375KV to ~500KV when control gain was lowered, something happened, maybe a spark to corona points, and now corona grid voltage is always indicating -15 volts. Will investigate tomorrow.
25 Jul 2023 Tuesday 17:13 [Tom Massey] We had a problem with the Termianal Potenetial Stablizer. We were running at 0.372 MeV and had run for 2 hours at this energy. I turned the control gain down. The Terminal Voltage went to over 0.5 MV. This tripped the overvoltage protection. The Grid Voltage is now stuck at -15 V. The concensus is that there may have been a spark to the corona points and this may have damaged some of this electronics. The corona current was notice to be very high before this happened.
25 Jul 2023 Tuesday 16:41 [carter] While using the crane in the Large Target Room today, I was raising the lift hook and there was a loud bang/noise and a yellow flash up by the drive motor on the trolley. I have turned off the breaker for the crane and put notices on the breaker and the control pendant that it is out of order. Turned on the LTR exhaust fan to vent any smoke and will investigate further tomorrow. Do not use the crane.
18 Jul 2023 Tuesday 11:20 [Ingram] The accelerator is running but with a beam and an energy that will not produce ionizing radiation on the roof or the mechanical room on the second floor. The work by facilities on the HVAC system can proceed while the accelerator is operating like this. David Ingram Dir. Edwards Accelerator Lab.
18 Jul 2023 Tuesday 10:57 [carter] Test of OUAL Logbook "Mail to Crystal Brooks" checkbox
18 Jul 2023 Tuesday 10:24 [Tom Massey] HVAC work today. Descaling is in progress. The leaking section will be evacuated, checked for leaks and recharged. This is expected to take the rest to the day.
17 Jul 2023 Monday 10:27 [Leblanc] HVAC work complete for Monday. OU HVAC team will return Tuesday at 6AM to flush the heater core to try to remove scale that is effecting heat exchanger efficiency. Trane technician is working on a quote to service loop one and replace leaking fittings and leak check. Trane tech will recommend refurbishment of chiller unit replacing compressors, heat exchangers, instrumentation, etc. Refurbishment carries a 5 year warranty. More information once I have feedback from OU HVAC.
17 Jul 2023 Monday 08:08 [Leblanc] Trane and OHIO HVAC technicians are on the roof this morning, troubleshooting our comfort chiller.
16 Jul 2023 Sunday 05:06 [Ingram] EPS system reporting Sysem Perifial Trouble Zone 401. Visusal check shows nothing. OUPD report cameras are not working.
13 Jul 2023 Thursday 16:58 [carter] I believe the unstable output issue of the buncher has been reolved and we should be OK to go tomorrow with the buncher.
30 Jun 2023 Friday 20:18 [leblanc] Mike from facilities HVAC arrived about 6 PM tonight to diagnose the comfort chiller. After some diagnostics and cleaning the chiller is operating, but not properly. Circuit 1 continues to drop out on "loss of charge". Circuit 2 is operating with extremely high (>400PSI) discharge pressure. Loaned a roof key to Mike so that he can check it in the morning, and see if the problem is likely heat related or refrigerant related. He will also try to get a Trane technican here next week to determine the course of action.
30 Jun 2023 Friday 15:07 [Justin Warren] The comfort chiller failed at approximately 12:30 PM and temperatures have risen considerably in the experimental area and control room. I've got a significant leakage current on the large target chamber as well (~ -2 nA). The accelerator has been shut down at this current time but the sputter source remains operational. Comfort chiller temperature according to the web log is approximately 78 F as of 15:06
28 Jun 2023 Wednesday 07:19 [Ingram] The Vesda system is showing an alert after reporting trouble from the small target room/control room system. I cannot see or smell a problem.
08 Jun 2023 Thursday 10:47 [Tom Massey] The control power was off when David Ingram and Justin Waren came in. There was no obvious cause to this. The air/water system showed clear. The vacuum gauge added on the high energy extension was operating in a normal range. This was assumed to be a transient and the control power was turned back on.
08 Jun 2023 Thursday 08:52 [Ingram] Vesda pipe 1 is reporting trouble intermittantly. It probably has a fluff bunny in it.
02 Jun 2023 Friday 14:49 [Leblanc] Shielding door from the vault to the loading doc was acting up today. After some searching around, found that the drive sprocket was partially disengaged from the gearbox. Removed sprocket and chain for cleaning. Will reinstall on Monday.
22 May 2023 Monday 09:14 [Ingram] Recovery from the power outage. Alarms reset and silenced. Water pumps turned on - not sure the primary loop pump is on. Suspect HVAC not working - air is muggy.
12 May 2023 Friday 16:36 [carter] Greg, Kate and I tested the power transformer in the disassembled HVEC analyzer magnet supply for the possibility of using the input taps on it connected as an auto-transformer, going in with 480 vac on the outer winding and using the lower voltage tap as a step-down auto-transformer to drop the 480 vac input to the required 360-440 vac. The test revealed that with 480 vac on the HI tap, we get 414 vac on the LOW tap, quite appropriate for our use in powering the new Heinzinger supplies. This will allow us connecting all of the new Heinzinger supplies up using the variac and transformer from the old analyzer magnet supply only.
10 May 2023 Wednesday 17:28 [carter] The first run using the new Heinzinger magnet power supply on the switcher magnet occurred today. Alexander ran a 6Li+3 beam at 3Mv on terminal, R65 degree leg. Switcher seemed stable and was running at ~106 Amps. The test of the dual DAC for fine and coarse control seemed to work well also.
20 Apr 2023 Thursday 21:12 [Bikash Chauhan] the aluminated light on the cups went out and the beam current was off. There was no terminal voltage. Mike called Greg. WE were able to get the lights glowing in the cups. As we were trying to increase theb charging voltage, the terminal voltage kept fluctuating on its own. As we increase the charging voltage, the sum current in tandom watch spike down. We then shut down the accelerator.
17 Apr 2023 Monday 17:50 [carter] High water alarm notifications checked and received by Carter, Leblanc, Ingram Brune and Massey.
17 Apr 2023 Monday 10:10 [carter] Quarterly check console DRD = 2,75 mR Visitor DRD = ,08 mR.
16 Mar 2023 Thursday 16:15 [Joseph Derkin] Greg and Joseph serviced the Cs sputter source on March 9th & 10th for cleaning and to replace the ionizer. There were suspicions that the ionizer may be poisoned and needing to be replaced. Source current was reading < 2uA on LE cup with a fresh proton pellet after over 8 hours of running the source. Source head was reinstalled on the 10th and began pumping down on high vacuum pump over the weekend of the 11-12th.
16 Mar 2023 Thursday 14:09 [Ingram] The sputter source is ready to be run. Talk with Greg about using it. I will be out of town on Friday. David Ingram
15 Mar 2023 Wednesday 16:46 [Ingram] Always on light in the STR is out as is the one on the west sdie of the LTR.
15 Mar 2023 Wednesday 16:42 [Ingram] Sputter source vacuum back to normal, 1.2E-6. Ionizer set to 10 A. All other controls run down, HV suppies may not be at zero.
15 Mar 2023 Wednesday 13:02 [Ingram] The sputter source is out of action until Greg has inspected and possibly replaced the cooling lines that were damaged by a small fire last night. The cause of the fire was the cooling lines on the left hand side of the source being moved too close to the source while it was running. High voltage discharge to the plastic probably ignited the plastic.
02 Mar 2023 Thursday 11:10 [carter] Checked for cause of instability of HE steerer supply #2 and found and replaced a bad/open high voltage resistor. Also removed the power supply for LE steerer #1 and checked all resistors and looked for any cause for abnormal behavior that had been seen but was not being seen now. No problems found and supply checked good. Checked for proper operation of all (HE and LE) steerer voltages and all look good now.
03 Feb 2023 Friday 18:53 [Justin Warren] Chain stretch alarm went off at approximately 17:30. Greg shut accelerator down and allowed it to cool for ~20 minutes. Upon restart, no alarm was triggered but after about ~10 minutes another chain stretch alarm was occured. Accelerator and source were shutdown and 9Be(p,n) experiment ended.
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 188.8.131.52.0000 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.