 Thursday, March 07, 2019, 09:12, David Wang, Conditioning Station, Standard Operation, TM2, , TM2 move from TCS to SHC.
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TM2 has been moved from TCS to SHC. The move is smooth. |
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Friday, March 15, 2019, 08:51, Travis Cave, Conditioning Station, Standard Operation, TM2, no target, Module move
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TM#2 has been moved from the south hot cell to the conditioning station. |
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Monday, March 18, 2019, 07:23, David Wang, Conditioning Station, Repair, TM2, , TM2 window line helium test
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New seals with a blank off cap are installed on TM2 window line water block. The seals are checked at TCS with 70 psi helium for 5 minutes with LD at 0.0xE-9atm/cc.sec. No response on LD during test. Seals are good. |
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Monday, March 18, 2019, 07:25, David Wang, Conditioning Station, Maintenance, TM3, , TCS vacuum pumps have been stopped.
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The TCS will be vented soon for TM2 move. |
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Tuesday, March 26, 2019, 09:32, Travis Cave, Conditioning Station, Standard Operation, TM2, Dummy Target, Module move
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TM#2 with a new source tray and the dummy target has been moved from the south hot cell to the conditioning station. |
Tuesday, March 26, 2019, 11:10, Travis Cave, Conditioning Station, Standard Operation, TM2, Dummy Target, Electrical Check 
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Electrical Check of TM#2 with the dummy target attached. |
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Thursday, March 28, 2019, 10:27, David Wang, Conditioning Station, Repair, TM2, dummy febiad test target, TM2 new source tray helium pressure test at TCS.
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Helium pressure test on TM2 all water circuits is done. 70 psi helium , 10 minutes test time. Leak detector :base leak rate 0.0XE-9 atm.cc/sec, base pressure 0.0Xe-4torr. No any response on LD during the test. All TM2 water circuit are leak free. |
 Thursday, March 28, 2019, 12:48, Anders Mjos, Conditioning Station, Repair, TM2, dummy febiad test target, TM2 new source tray helium pressure test at TCS.
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| David Wang wrote: |
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Helium pressure test on TM2 all water circuits is done. 70 psi helium , 10 minutes test time. Leak detector :base leak rate 0.0XE-9 atm.cc/sec, base pressure 0.0Xe-4torr. No any response on LD during the test. All TM2 water circuit are leak free.
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Thursday, March 28, 2019, 12:40: Found valve to expansion tank TCS:TK2 to be closed. Opened valve. This allow air to escape out of the system and the water system is running as expected again
Friday, March 29, 2019, 11:15: Changed EE to conditioning mode
Friday, March 29, 2019, 11:35: BIAS / EZL 20 / 10 kV
Friday, March 29, 2019, 13:47: BIAS / EZL: 25 / 12.5 kV
Friday, March 29, 2019, 16:09: BIAS / EZL: 30 / 15 kV
Friday, March 29, 2019, 17:23: No sparks for >60 min
Friday, March 29, 2019, 17:26: BIAS / EZL off
Monday, April 01, 2019, 08:13: BIAS / EZL: 30 / 15 kV
Monday, April 01, 2019, 08:33 BIAS / EZL: 35 / 17.5 kV
Monday, April 01, 2019, 09:00: Sparking at about 37.5 kV BIAS. Lowered below 20 kV to stop. Now sparking at around 20 kV
Monday, April 01, 2019, 10:00: BIAS/EZL 22 / 20 kV. Occasional sparking on BIAS as voltage is increased.
Monday, April 01, 2019, 10:05: Change of strategy. Will heat target to bake out the vacuum before continuing with HV conditioning.
Monday, April 01, 2019, 10:43:
BIAS / EZL / EE: 15 / 7.5 / 1.5 kV
COIL / ANODE: 10 A / 200 V
Ramping TGHT / TBHT at 1 A/min. Good/bad vacuum (IG2): 1E-6 / 2E-6 Torr
Monday, April 01, 2019, 19:16: TGHT / TBHT: 500 / 270 A. Vacuum increasing. IG1/2 1.2E-7 / 1.4E-6 Torr
Monday, April 08, 2019, 09:28: BIAS / EZL: 20 / 10 kV (some periods of multiple sparks)
Monday, April 08, 2019, 10:28: BIAS / EZL: 30 / 15 kV (some periods of multiple sparks)
Monday, April 08, 2019, 11:24: 3 sparks for the last 60 min
Monday, April 08, 2019, 14:43: BIAS / EZ: 40 / 20 kV (after two periods of sparking around 39 kV requiring voltage to be reduced below 30 kV to recover)
Monday, April 08, 2019, 15:57: Two sparks in 70 min
Tuesday, April 09, 2019, 12:40: BIAS / EZL 40 / 20 kV with >90 min without sparking
Tuesday, April 09, 2019, 16:00: BIAS / EZL 48 / 24 kV
Tuesday, April 09, 2019, 16:07: Sparking tripped TPs and IG1S, then power supplies.
Tuesday, April 16, 2019, 16:41: BIAS / EZL 50 / 25 kV for 1 hour without sparking.
Wednesday, April 17, 2019, 15:23 : Continued without problems to 50 kV earlier, but sparks tripped off vacuum just above 50kV. Continue later. |
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Wednesday, May 22, 2019, 08:33, Travis Cave, Conditioning Station, Standard Operation, TM1, no target, Module move
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TM#1 has been moved from the north west silo to the conditioning station for the day it will be moved back to the silo tomorrow morning. |
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Wednesday, May 22, 2019, 11:52, David Wang, Conditioning Station, Maintenance, TM1, , TM1 inpsection.
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TM1 shielding plates and their holding bolts are inspected. No corrosion. TM1 is located at TCS now. Both TP1 and TP2 are started. |
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Friday, June 07, 2019, 08:56, Travis Cave, Conditioning Station, Standard Operation, TM4, no target, Module move
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TM#4 has been moved from the south hot cell to the conditioning station. |
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Friday, June 07, 2019, 13:11, David Wang, Conditioning Station, Development, TM4, , TCS and TM4.
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TM4 has been connected at TCS for HV test. TCS water system and vacuum pumps are switched on. |
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Monday, June 10, 2019, 08:26, Carla Babcock, Conditioning Station, Maintenance, TM4, No target, Ramping voltage on TM4 w/o source tray
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TM4 in conditioning station with no source tray, extraction electrode set to HV bias. Brought up to 30kV over the weekend by ISAC ops with no issues.
BIAS=30kV
EL=15kV
IG1=9.4e-7T
Monday, June 10, 2019, 08:21 : At 32.4kV on bias, EL at 15kV, bias sparked to EL. Every bump of 100V on bias is accompanied by a small vacuum jump and often by a small current increase from ~60uA to 120uA.
* Conditioning station read back and set values are off by 2kV but archive values show this has always been the case. Which to trust? *
Monday, June 10, 2019, 08:54 : Spark while sitting at 38kV on bias, 19kV on EL. Seems to be a spark to EL. Sitting at 38kV for ~10mins
Monday, June 10, 2019, 09:32 : Sat at 40kV for ~10mins or so, bumping up again.
Monday, June 10, 2019, 09:38 : Spark to EL while sitting at BIAS / EL = 42kV / 20.5kV
Monday, June 10, 2019, 13:57 : Ramped to BIAS / EL = 43 / 21.2. No problems other than what seems to be the usual conditioning station stuff.
Monday, June 10, 2019, 14:17 : Couple sparks on the way to 48kV, seems to be to the EL.
Monday, June 10, 2019, 14:36 : Up to BIAS/EL = 51/25.5 with no big problems. Will stay here for a couple mins
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Monday, June 10, 2019, 16:22, Carla Babcock, Conditioning Station, Maintenance, TM4, No target, Ramping V on TM4, no HV cover in TH
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Ramped down the bias so David could remove the HV cover and lock out the target hall.
Ramped back up to BIAS / EL = 50kV / 26kV quickly with no sparks.
Monday, June 10, 2019, 15:35 : BIAS / EL = 52kV / 26kV
Monday, June 10, 2019, 15:45 : BIAS / EL = 54kV / 28.5kV. It seems that keeping the EL at 1/2 the bias voltage is right on the edge of what is acceptable - the HV seems to be sparking to the EL instead of to ground (either that or the EM interference from the sparks it producing a reaction in the EL...) I will run the EL higher and see if that helps.
Monday, June 10, 2019, 15:57 : Sat at 54kV for > 10mins, will continue up
Monday, June 10, 2019, 16:11 : At BIAS / EL = 55.8kV / 29kV got some sparks, some to EL and some to ground. Back at 55kV.
Monday, June 10, 2019, 16:24 : Sitting at 56kV for a couple mins
Monday, June 10, 2019, 16:37 : Sitting at 56.3kV bias, a spark tripped off the IG1S, which tripped the turbo and shut down all the HV. Back to zero! |
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Monday, June 10, 2019, 18:12, Carla Babcock, Conditioning Station, Maintenance, TM4, No target, Attempt to push bias > 56kV
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Monday, June 10, 2019, 16:59 : TM4 back up to BIAS / EL = 56.1kV / 29.5kV
Monday, June 10, 2019, 17:14 : After 57kV on the bias, things seem to be getting sketchy. The EL voltage and current are a bit jumpy and stepping that voltage up seems to produce a slight spike in the bias current.
Monday, June 10, 2019, 17:31 : At BIAS / EL = 58 / 30.3, looks ok.
Monday, June 10, 2019, 18:11 : Sitting at 59.5kV, could probably push further but will sit here for ~30mins and make sure it is relatively stable. Note 59.5kV set point is really 56.9kV on readout.
Monday, June 10, 2019, 18:18 : some current inconsistencies (not really sparks probably corona discharges...) so went down to 59kV
Monday, June 10, 2019, 18:23 : still getting some sparks at 58kV, going down to 57.5.
Monday, June 10, 2019, 18:37 : went back up to 58, spent 10 mins there but was getting these corona-discharge-type-sparks where the vacuum responds and current is drawn but voltage is maintained. Went down to 57kV, still getting them....
Monday, June 10, 2019, 18:40 : Going down to 56 to see if they stop....
Monday, June 10, 2019, 18:42 : Trying 55 kV now... see attached screenshot for example of sparks
Monday, June 10, 2019, 18:48 : No luck at 55 or 54kV. Going down to BIAS / EL = 50 / 27 for a while to see if this resolves
Monday, June 10, 2019, 19:20 : 30 mins at 50kV, a couple little sparks, but no big deal. Ramping up to 55 and let's see if it is ok.
Monday, June 10, 2019, 19:30 : 55 still not working, going down to 54
Monday, June 10, 2019, 20:16 : Held bias at 54kV for about an hour - dropped it down once to alleviate some sparking. Leaving it at 50kV overnight, ops have instructions to keep an eye on it and shut it off if anything seems strange. |
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Wednesday, June 12, 2019, 08:56, Carla Babcock, Conditioning Station, Maintenance, TM4, No target, More TM4 conditioning without source tray
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The conditioning station was ramped down overnight and David ramped it back up this morning. Currently trying to get it to sit stable at something higher than 55kV.
Wednesday, June 12, 2019, 08:11 : Sitting at BIAS / EL = 53.9 / 28, 2 sparks to ground, one turned off TP2
Wednesday, June 12, 2019, 08:53 : Been at BIAS / EL = 56 / 28 for >10mins with no real sparks. Will continue up.
Wednesday, June 12, 2019, 08:54 : Spark to EL at 56.1
Wednesday, June 12, 2019, 09:34: Sitting at 55kV for 40 mins. 2 sparks to ground, 1 spark to the EL.
Wednesday, June 12, 2019, 09:49 : Leaving it at 56.6 for a while
Wednesday, June 12, 2019, 09:56 : Either there was a spark to IG1S or there is a vacuum limit that does not accept a 1.2e-6T spike. Everything turned off, but everything seems to still be working. |
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Thursday, June 13, 2019, 10:55, David Wang, Conditioning Station, Repair, TM4, , TM4 HV test at TCS without source tray.
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I brought up TCS bias to 57.5 KV on TM4 without source tray at TCS. It was kept at this level about 1.0 hours. Some intermediate sparks. No spark trip on devices. 57.5KV is very close to the HV up limit of this module. |
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Monday, July 08, 2019, 14:56, Carla Babcock, Conditioning Station, Repair, TM4, Dummy HP SIS target, First TM4 conditioning with new source tray
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Ramping up TM4 with new source tray in. Current condition: new source tray but no water running in lines B, D or window. Multipin on the source tray grounded but no lines running into the service tray. Vacuum at 1e-6T.
Small sparks at each BIAS voltage increase starting at 30kV. First real spark around 38kV.
Going up in more than 100V steps causes spikes that take out TP2.
Monday, July 08, 2019, 14:54 : TP2 sparked off at BIAS/EZL = 44kV/25.1kV after 10mins at this point... will leave it here for a couple hours
Monday, July 08, 2019, 16:44 : 6 sparks in last 2hrs, some very strange vacuum response in which the pressure rose steadily and stayed high for 30mins before coming back to normal.
Monday, July 08, 2019, 17:25 : After 30mins at 45kV, started sparking, so will ramp down to 40kV and leave it overnight |
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Tuesday, July 09, 2019, 09:15, Carla Babcock, Conditioning Station, Repair, TM4, Dummy HP SIS target, Conditioning TM4 w/ new ST up to 45kV
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Left TM4 at 40kV overnight with no previous heating. There was only one real spark which turned off TP2 but ops turned it back on. Ramping up again.
Tuesday, July 09, 2019, 09:13 : At 45kV the module is sparking on the top pretty regularly. Turned down and David will remove cover and lock out target hall.
Tuesday, July 09, 2019, 16:30 : Went up to 45kV pretty easily now.
Tuesday, July 09, 2019, 16:32 : Everything tripped at 46.5kV. Looks to be a spark outside the vacuum. TM4 sparking much more outside the vacuum than last checks done without the source tray...
Tuesday, July 09, 2019, 16:43 : Everything easy up to 46.8kV, then sparking a bit. Most of the sparks are outside the vacuum. Sitting at BIAS / EZL = 47.1kV / 28kV for a couple mins before ramping down.
Tuesday, July 09, 2019, 16:57 : 10 mins at 47.1kV with not problems. Continuing up still looks like it is really sparking a lot outside the vacuum. |
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Wednesday, July 10, 2019, 11:59, Carla Babcock, Conditioning Station, Repair, TM4, Dummy HP SIS target, Conditioning TM4 w/ new ST up to 50kV
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David raised the bias to 49.5kV. Module is still sparking mainly on top. Humidity is super high.
Wednesday, July 10, 2019, 09:50 : sitting at 49.7kV for a coupe mins, big spark in vacuum took everything down.
Wednesday, July 10, 2019, 10:16 : Bias at 50kV drawing 0.1mA but looking pretty jumpy. Left it here for ~5 mins then had to turn down bias for TH work.
Wednesday, July 10, 2019, 13:33 : Back at 50kV on bias with no problems.
Wednesday, July 10, 2019, 13:46 : 10 mins at 50kV, will try to go a bit higher
Wednesday, July 10, 2019, 14:06 : Everything sparked off while sitting at 50.6kV. This seems a bit futile....
Wednesday, July 10, 2019, 14:15 : Back at 50.1kV with no problems
Wednesday, July 10, 2019, 14:33 : Up to 51kV
Wednesday, July 10, 2019, 15:20 : Difficult to go above 51.4. Turning up EZL since there were a couple sparks to it. -> Putting this up causes significant sparks between HV bias and EZL in vacuum at 5kV on the EZL, 51.1kV on bias. Leaving EZL @ 5kV
Wednesday, July 10, 2019, 16:04 : Around 52.2 sparking on the top of the module
Wednesday, July 10, 2019, 16:36 : 53kV
Wednesday, July 10, 2019, 17:16 : up to 54kV without much trouble
Wednesday, July 10, 2019, 17:53 : Sitting at 55kV for about 4mins when a spark tripped off everything. Will try to bring it back to sit stable at 55kV tomorrow
Thursday, July 11, 2019, 10:28 : TM4 up to 54.9kV without too many problems, EZL at 25kV. Will sit here for a little while
Thursday, July 11, 2019, 10:48 : 20mins at 54.9kV, going to 55kV
Thursday, July 11, 2019, 11:14 : 25 mins at 55kV and everything sparked off
Thursday, July 11, 2019, 11:26 : Back up to BIAS / EZL = 54.8kV / 26kV. Checked that the TGHT and TBHT power supplies have not been killed by sparks, everything looks fine.
Thursday, July 11, 2019, 12:56 : Sat at 49.6kV for 1.5hrs with one spark.
Thursday, July 11, 2019, 14:02 : Been sitting at 55kV for 2 hrs now with one spark.
Friday, July 12, 2019, 08:09 : Back up to 52kV easily, then had to reduce step size to 100V to keep going
Friday, July 12, 2019, 08:47 : 56kV
everything sparked off at 56.5 or so
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