OUAL Electronic Logbook

Connection from IP address 18.188.188.143
Time: 2025 May 15 0:36:56
Found 2871 logbook entries, displaying most recent 100

Logbook Contents (Most Recent Entries)

14 May 2025 Wednesday 15:53 [Leblanc] Alphatross inspected and found blocked again. There seems to be some sort of problem with the cooling baffle between the plasma bottle and the charge exchange chamber. Source ran after clearing the blockage, but only 15 nA of He-, and 600+ nA of O-. Plasma color is better, possibly still a bit pink. RF is back up to around 0.5 (beginning of the red) on the meter. Might try starting the source again tomorrow before a full rebuild.

06 May 2025 Tuesday 15:10 [carter/leblanc] The foil stripper up-one switch has been replaced and can now be used again.

30 Apr 2025 Wednesday 08:23 [Ingram] Vesda filters changed.

23 Apr 2025 Wednesday 10:51 [carter massey cade mike] Quarterly checks done, console DRD was 0.40, User DRD was 1.11. DRD's reset.

22 Apr 2025 Tuesday 19:05 [Jackie Kuroda] Alpha source had no beam current coming out of the source as well as a high probe current. The canal on the source was clogged. After being unclogged the source was turned back on, came up normally when the magnet current was rasied (it did not do this initially) as well as the plasma color was blueish and evenly distributed in the bottle (initially it was purple and only in part of the bottle). I was able to get about 40 nA of current on the LE cup.

18 Apr 2025 Friday 23:58 [Cody Parker] During a beam swinger angle change, some water underneath the stairs was noticed. The source has been traced to the black tubing on beam right that connects to the copper piping for the swinger magnet cooling water. The pipe was wrapped with a spill mat and a few other spill mats were placed on the floor. The large black valves labeled 'magnet supply' and 'magnet return' in the trench near Quad 2 have been closed in case the leak gets worse. I will check the area tomorrow when I help the outside users pack up.

17 Apr 2025 Thursday 08:20 [Cody Parker] When turning on the operator's DRD to write a header file I must have accidentally pushed the mode button before the startup cycle was completed. I have accidentally reset the total on the DRD. The readout value of 0.00 has been used to create the header file.

08 Apr 2025 Tuesday 21:17 [Bikash Chauhan] The vault gate at swinger was left open, no one was exposed at the operator room. There was a shutdown, we reset the radiation counter and began to run after following all the procedures.

03 Apr 2025 Thursday 16:18 [Ingram] LE vacuum was higher than usual when I came to shutdown. I noticed that in the plot the LE vacuum appears to be unstable.

02 Apr 2025 Wednesday 17:07 [Leblanc] Sputter source vacuum has shut down again. I turned on the cold baffle compressor by itself on 2 separate occassions and it seemed to shut down after some as yet undetermined time. This leads me to believe there is something in the cold baffle circuit causing the trip. We will need to investigate further at some point. Eventally got the baffle compressor, diff pump, and baffle valve all running together, but I'm unsure if they will continue running overnight. Perhaps this is similar to the event we saw several weeks ago.

02 Apr 2025 Wednesday 17:01 [Leblanc, Carter, Campbell] Quad 2 repairs are complete. 1 coil changed for spares, all tested at 20A and voltage drop across each coil recorded. Cooling water was inspected and no leaks were seen. Magnet was run at 30A for approximately 30 minutes. No heat rise was observed and magnet supplies seemed stable. Completed inventory of spare quadrapole magnet coils, and found 5 unusable that have been recycled, and 4 spares. We need to determine the best way to utilize the varian air-cooled models that we have, since they may not be a drop-in replacement, and there is no access for alignment of Quad 2. Gate valve at the top of the analyzer cryo pump has been replaced. A new face seal was installed on the manual gate valve immediately adjacent to the cryo pump. Analyzer cup pneumatic cylinder was removed and taken to the shop for cleaning and a new X-ring. It seems to operate more smoothly, but still stops approximately 1/4" shy of full stroke when taking the cup out. Need to investigate with beam to determine if this is adequate.

28 Mar 2025 Friday 16:40 [Leblanc, Carter, Massey] Tested foil indexing with alphas today. Foil positions were reported incorrectly from end of shutdown until today. Reported positions were off by 34. Indexing has been reset so that position zero (0) is for gas stripping. Position 1 is a stopping foil. Remaining foils are as follows: 1μg/cm² positions 2 through 26; 2μg/cm² positions 27 through 50; 5μg/cm² positions 51 through 75

18 Mar 2025 Tuesday 17:40 [Leblanc, Carter, Kuroda] Worked on tuning the alpha beam to L15 RBS chamber. No luck at 3 Mev. At 6 MeV managed to get 40nA on 1st coliminator, but no current on chamber/FC. Analyzer cup current was 65nA. Shutting down for the evening.

17 Mar 2025 Monday 17:37 [Leblanc] SF6 low pressure alarm triggered this morning. A quick investigation found that there was some SF6 present near the electrical feedthroughs for the dryer unit closer to the LE end of the machine. Logbook entries from 2013 indicates that the leaking feedthroughs on the left dryer were replaced. Visual inspection indicates that left may indicate the ones closer to the HE end of the machine. Purchase order shows that 4 were purchased, but there are 4 clearly used items found in a bag labeled for feedthroughs. It look like we may have lost as much as 0.5 bottles of SF6 since gas-in at the beginning of February. Dryer system has been isolated tonight to help determine leak rate.

12 Mar 2025 Wednesday 14:23 [Don Carter] Nisha left a note that the BCI did a reset when she opened/closed the Large Target Room door. This was likely caused because the BCI had a cable connected to the remote reset input that been used in the Joseph Derkin R45 measurement. The computer had been removed and the line to the BCI Reset was left unconnected and likely acted as an antenna and coupled noise from the door opening and closing and inadvertently reset the BCI. Hopefully this will not happen now.

07 Mar 2025 Friday 18:36 [Tom Massey] I have shut down the sputter source. We had 10 microamperes at 115 degrees for the cesium resevior. The cesium resivior took a longer time than nomal to cool down. I turned down the feed tube to 450 mA to allow the reservoir to cool down.

04 Mar 2025 Tuesday 20:12 [Jeswald] After a day of struggles, we managed to tune the beam to have one microamp on target. The count rate on the NE213 detector was still too high. The beam settings were logged and the magnets were turned down to 5 amps. The plan is to come in in the morning and continue working on the detectors.

25 Feb 2025 Tuesday 18:49 [Jeswald] At around 4:45 - 5:00 pm, Mike and Cade were changing the detector distance. When we came back into the control room, the sputter source appeared to have tripped off. The Del high voltage and Glassman high voltages were also off. No alarms had sounded to alert us of this problem any sooner. The sputter source vacuum interlocked had activated and the diffusion pump baffle had shut. The ion gauge had tripped off. Greg, Don, and Cade reset all power supplies and gauges. As of now, we are unaware of what triggered this shut down - Possible RFI from the alphatross. Currently, we are attempting to start the sputter source again.

22 Feb 2025 Saturday 20:37 [ Tom Massey] I set the swinger current to 50 AMP to keep the chiller from freezing up.

21 Feb 2025 Friday 17:53 [Tom Masssey] The flashing red lights, which show the accelerator is running, in the upstairs hallway are not working.

17 Feb 2025 Monday 10:46 [Leblanc] New foils loaded into the accelerator. A stopping foil was placed in position 1 (I thought it was 0, but gas stripping worked on position 0). Foils are as follows: 1μg/cm² positions 2 through 26; 2μg/cm² positions 27 through 50; 5μg/cm² positions 51 through 75. Foil position 50 gave poor transmission with d- @ 3.5 MV terminal.

11 Feb 2025 Tuesday 10:40 [carter] Ludlum DRD accumulated for Jan 2025 shutdown tests (delayed until 11 Feb 2025 because of accelerator maintenance), console DRD 0.84 and roaming DRD was 0.00.

06 Feb 2025 Thursday 14:17 [carter,leblanc] To get foil changer to operate need circuit breakers #6 and #8 under console ON and key switch ON and control power ON.

12 Dec 2024 Thursday 10:04 [Leblanc, Campbell] N2 bottle in terminal found to be 125 PSI.

19 Nov 2024 Tuesday 18:25 [Alexander V] Alarm went off, terminal voltage dropped from 3.75MV down to about 3.5MV, and came back on its own. Column current increased by about 5-10% and then came gradually back down to the level slightly greater than it was before. Operation continued.

28 Oct 2024 Monday 17:37 [Jackie Kuroda] Moved copper flat bands around on the inductor in alpha source this did not improve the rf meter on the source. Changed copper flat copper bannds on alphatross to copper braids moved them around and the rf meter off scaled. As the alphatross was turned on the rf reading decreased and increased in the red part of the meter. The current on the LE cup got up to about 170 nA. There is probably a leak as there was a 1.5 uA Oxygen beam.

21 Oct 2024 Monday 02:28 [Joseph Derkin] Sputter source shut off around 11:30pm and I saw it on the online stacked plots ~2 hours later. It looks like a vacuum failure and the diffusion pump is off. LE and HE tube vacuum appears to be intact.

09 Oct 2024 Wednesday 09:40 [carter] uncher output tube 4-65A replaced, unstable and drawing grid current, Low output power.

08 Oct 2024 Tuesday 11:43 [Leblanc, Saugier, Massey, Carter] Quarterly checks complete. Main DRD: 0.01 mR Secondary DRD: 0.0 mR

27 Sep 2024 Friday 14:37 [carter] Quad1 B cooling fan was bad and was replaced. Quad1 B back in operation.

26 Sep 2024 Thursday 16:10 [Leblanc, Derkin, Singh] Loss of beam current was observed this afternoon. Investigation showed that Quad 1B PSU is dropping to 0 current after approximately 5 minutes. Quad 1B will recover current after 3-4 minutes. BCI current level discriminator configured to allow intermitten running this afternoon. Need to troubleshoot PSU.

17 Sep 2024 Tuesday 07:59 [carter/leblanc] HE quad B (lower unit) failed and was replaced with in-house spare. Symptom was half current with no programming voltage.

31 Jul 2024 Wednesday 09:14 [Leblanc] Alphatross service. Hours 19519.2. Replaced Aluminum canal, BN insulator, and canal holder with Ta canal and fresh insulator and canal holder. Replaced O-ring from bottle to Rb chamber. Replaced gas line O-ring and trimmed line. Found some scoring in the outside of the gas delivery line, which may have lead to poor performance with He.

22 Jul 2024 Monday 11:33 [carter] High energy ion gauge found off and control power off. Ion gauge would not stay on. Replaced the cards in the HE ion gauge controller and re-opened HE pumping station pump valve. All seems OK at this point.

20 May 2024 Monday 09:37 [Ingram] 9:15 AM Alarms reset: tritium, alarm panel, shutdown. Loop water pumps started. Lot of air in magnet subloop. Not sure the primary pump is running. Logbook link on console computer not working.

15 May 2024 Wednesday 10:41 [Tom Massey] The radiation monitor is sounding. The counter and graph show a large increase of count rate. All of the radiation monitors on the display showed only background levels of radiation. The counter was reset but the count rate remained high and tripped the alarm in a few minutes. The door to the control room has been closed to reduce the noise. Repairs will be attempted when Don Carter returns.

07 May 2024 Tuesday 13:33 [carter] Tritium monitor pump motor bearings were squeeling and needing repacment. Spare pump/motor was installed and will see if shop can replace the motor bearings in the old one.

22 Apr 2024 Monday 10:01 [carter] Control1 and firewall computers imaged to new 500 GB SSD's and old discs retired and new SD's installed. 22 April 2024.

16 Apr 2024 Tuesday 14:56 [carter] Re-aligned NMR range switch coupling and cleaned contacts with Deoxit contact cleaner. Seems o be woking OK now.

12 Apr 2024 Friday 10:45 [carter] Test entry adding Andrea and Cody to "all operators" logbook email checkbox list.

12 Apr 2024 Friday 10:43 [carter] Test logbook entry with send to Cody and Andrea checkbox checked.

01 Apr 2024 Monday 15:31 [Leblanc, Parker, Richard, Rambo, Derkin, Jeswald, Carter] Quarterly Safety Check Operator DRD: 4.75 Secondary DRD: 0.01

28 Mar 2024 Thursday 09:30 [Joseph Derkin] This morning I observed the R45 cryopump near switching wall had failed. Televac ion gauge controller was not responding, and the cryopump was heavily frosted over. I opened up the roughing valve to the cryopump, unplugged the cryo from the compressor, and turned on a fan.

08 Mar 2024 Friday 14:52 [carter] Sputter source water level alarm readjusted to proper intensity value to compensate for bulb ageing.

12 Feb 2024 Monday 14:57 [carter] Added an entry in /etc/rc.local to automatically at boot run the shell script to set stty parameters for magnet programs. It is /home/carter/bin/stty_setup and will need to be run at least once after reboot. To see current options "sudo stty -F /dev/ttyS[0,4,5] -a".

23 Jan 2024 Tuesday 12:16 [Carter, Leblanc] Recalibrated inflection magnet settings logger this morning. Logged magnet current logged value was lower than actual value. Multiplied old value by 1.183 to obtain readings that match with the readout of the set current in the inflection magnet controls. Last night currents were reading around 0.83A, actual value was 0.99A.

18 Jan 2024 Thursday 17:13 [Leblanc] Ion gauge in the HE beam leg (between HE gate valve and analyzer magnet is off, and the filament appears to be burn out. No running possible until it's replaced. Cesium sputter source left off, though it is ready to run.

02 Jan 2024 Tuesday 15:02 [Tom Massey] Quarterly check DRD last reading 2.71

30 Dec 2023 Saturday 16:05 [Leblanc] VESDA trouble with minor low air flow pipe 2 on the DOCK VLS. Tried cleaning out the pipe from either end, but it didn't fix the problem. Normalized the air flow using the VSM software, and that appears to have cleared the error.

29 Dec 2023 Friday 13:17 [Tom Massey] The VESPA touble cleared itself. The system is normal now.

29 Dec 2023 Friday 12:33 [Tom Massey] Vespa trouble alarm. The screen shows "DOCK VLS - Minor Air flow piep 2"

07 Dec 2023 Thursday 09:32 [Leblanc] Radiation monitor for the vault went off because I unhooked it. Facilities guys had scaled the scaffolding and needed to move it 2', but the radiation monitor was in the way and the wires were behind the scaffold. I removed the wires but before they finished that work, my alarm to leave for class went off and I left without reconnecting it. The alarms didn't go off because the rate wasn't high enough during the remaining 3 hours of the 8-4 shift to trigger the alarm. Detector reconnected to the system and accidental shutdown log filled out. Accelerator paper logbook also updated with brief information.

07 Dec 2023 Thursday 08:52 [Ingram] Shutdown alarm going off. No obvious source of radaition. Chart shows steady increase in recroded level that does not appear on the meters.

29 Nov 2023 Wednesday 15:28 [carter] Shell script to set stty parameters for magnet programs is /home/carter/bin/stty_setup and will need to be run at least once after reboot. To see current options "sudo stty -F /dev/ttyS[0,4,5] -a". Also now prevent left click below zero and also now do tcflush(fd,TCIOFLUSH) after opening device.

17 Nov 2023 Friday 18:01 [Leblanc] Sputter source maintenance today. Symptoms leading to service were low D+ beam currents and target current < 2mA. Expectation was to find Cs depleted. Inspection found that Cs was OK, but the source was quite dirty with sputtered material. Many parts of the source also showed discoloration from high temperatures. Bead blasted many internal components, cleaned, and reassembled. Added an additional 5g of Cs to reservoir. Left system pumping with ion gauge reading mid-10^-5. Settings logger restarted. Ionizer left at about 10A/3.5V. Gate valve to low energy extension leaked during Ar backfill of the source. Regenerated LE cryopump. Didn't have good enough vacuum to turn on the ion gauge before leaving, but pump was recovering.

03 Nov 2023 Friday 09:31 [Leblanc, Warren] Alphatross source wasn't responding this morning. Alphatross shortcut did not start the software, even after rebooting the PC. Invoking alphatross from the command line revealed "no route to host". Inspection found no link-light on the blue cable on the alphatross switch. This cable terminates in the control room behind the console. All 3 UPS units on the shelf were off, causing the alphatross switch to be without power. The front 2 UPS units started without issue. The rear tripplite unit would not start, but only appears to be powering Alexander Voinov's USB external disk. Left the third UPS alone for now.

02 Nov 2023 Thursday 00:32 [Joseph Derkin] The last thing we did tonight was perform an energy change to 5.1 MeV, and the source started to show strong fluctuations. This made tuning extremely difficult, we were only able to achieve 10nA max before calling it for the night. I logged the accelerator settings and am leaving the alpha source on at Greg's direction. We will need to investigate the source output in the morning, I was measuring fluctuations from 0 - 400 nA at the HE cup. I did try tuning on the inflection magnet, einzel lens, and "focus voltage" with no success. CMU would like to start at 5.1 MeV again in the morning.

24 Oct 2023 Tuesday 16:56 [Joseph Derkin] Shutdown module went off while machine was running, E2 alarm indicating sub loop temp warning. Don and I investigated and the secondary loop inlet is reading 0 psi, and the outlet reads 50 psi. Secondary loop temp reading 82 F. Control power left off until tomorrow.

20 Oct 2023 Friday 16:07 [Leblanc] Leak found on Helium supply line for analyzer cryo-pump using sniffer mode on the leak checker. Spare line retrieved from LTR spares and installed temporarily. Need to work on re-routing when accelerator downtime permits. High energy and analyzer cryo-pump gate valves are closed and the pumps turned off. Cryo-compressor is running to circulate helium through the lines and remove any impurities. Analyzer leg left on roughing vacuum to avoid leakage into R45. Plan is to rough out the two cryos on Monday and recover vacuum.

20 Oct 2023 Friday 09:23 [Ingram] HE compressor has lost He again. Swicher pump is sweating. I have shut off the compressor. I am trying to save the vacuum in 45R which is about 1E-6 by roughing on the switcher beam line as the pump warms up.

17 Oct 2023 Tuesday 10:52 [Leblanc et. al] Operators DRD Accumulated dose 0.72mRem Guest DRD accumulated dose 0.07mRem

09 Oct 2023 Monday 16:26 [Ingram] We have confirmed the gate valve between the switcher and the 45R beamline is leaking when it is closed. Venting 45R caused an immediate pressure rise to off-scale on the tc gauge monitoring the beamline between the switcher and the analyzer magnets. For now both the 45R and switcher/analyzer sections need to be maintained at the same vacuum level or one will cause problems for the other.

06 Oct 2023 Friday 12:00 [Joseph Derkin] I replaced one filament on the nude ion gauge on R45. Both of the old filaments were measured as an open loop. The ion gauge controller was checked with the test gauge and confirmed to be in working condition. One of the spare filaments was already broken in the box, and I did not find any other spares. The R45 section of beam pipe near the switcher magnet wall was vented to atmosphere at 10:50am. The gauge has been reinstalled and is roughing down now.

03 Oct 2023 Tuesday 15:11 [Ingram] The LE cryopumps are working again. The HE cryopumps are shutdown until Greg can do some maintenance on them. The accelerator will not to be used until that happens.

03 Oct 2023 Tuesday 11:52 [Ingram] HE cryopump compressor needs helium. It is reading 0 psi running and 25 when stopped.

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.