 Thursday, March 12, 2015, 09:48, Travis Cave, South Hot-Cell, Standard Operation, TM2, No target , Module move
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TM#2 with no target and no source tray has been moved from the conditioning station to the north east silo. |
Tuesday, October 14, 2014, 17:19, Anders Mjos, Conditioning Station, Standard Operation, TM3, No target, High Voltage Conditioning 
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Wednesday, October 14, 2014
The BIAS voltage was brought up between 1:30pm and 5pm. Sparks tripped the BIAS power supply at voltages between 20 - 24 kV. Multiple attempts were made. The current was about 50-60 uA.
Wednesday, October 15, 2014
Temperature in the cooling circuit is too hight to do a HV test. The cooling circuit was started, but shuts off after ~10 m
Thursday, October 16, 2014
David and I found that the fans on the cooling unit on the roof did not run and that the compressors get hot and likely trip on over temperature protection (hot to the touch). We found the manual in the control panel of the unit.
10am: HV to 20kV before a spark tripped the PS. Current at 40 uA - resistivity at 11.9 Mohm
5pm: HV to 20kV before fluctuations in current, then a spark tripped the PS. Current around 40 uA. Resistivity 12.6 Mohm
Friday, October 17, 2014
8am: Staging did not start over night. TS5 temp is 31 deg C, which would have tripped power supplies. Reset and enabled staging.
The system increased staging until all 3 compressors were running.
9am: Cooling supply temperature reached ~3 deg C. Disabled staging and switched off all pumps
2pm: Switched off water circulation for the weekend.
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Monday, March 16, 2015, 14:16, Travis Cave, Conditioning Station, Standard Operation, TM4, No target, Module move
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TM#4 from south hot cell to the conditioning station no target is attached to the module. |
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Tuesday, March 24, 2015, 08:46, Travis Cave, Conditioning Station, Standard Operation, TM4, No target, Module move
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TM#4 with no target has been moved from conditioning station to the south hot cell. |
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Friday, April 17, 2015, 09:09, Travis Cave, South Hot-Cell, Standard Operation, TM1, No target, Module move
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TM#1 with no target has been moved from the south west silo to the south hot cell for the installation of the UCx target. |
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Thursday, April 30, 2015, 08:50, Travis Cave, South Hot-Cell, Standard Operation, TM2, No target, Module move
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TM#2 with no source tray has been moved from the north east silo to the south hot cell. |
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Wednesday, May 06, 2015, 14:30, Travis Cave, South Hot-Cell, Repair, TM2, No target, Wiring of TM#2
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Wires for TM#2 steering elements, and png gauge have been run down to the containment box level. Chad has placed them in the little cable trays. Slack has been pulled back. and termination of the wire will be done on the 7th of May. A modification was done to the signal line of the png gauge wire ultem block, as grounded screw was inserted to allow for strain relief so the end would hopefully quit breaking. See attached pictures for the details. |
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Thursday, May 07, 2015, 11:02, Travis Cave, South Hot-Cell, Repair, TM2, No target, Wiring of TM#2
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Wires in TM#2 have been terminated at the top of the module. |
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Monday, July 17, 2017, 16:28, Anders Mjos, Conditioning Station, Development, TM3, No target, Conditioning TM3
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50 kV stable with less than 1 spark/h during the weekend by RIB obs.
Today 57 kV reached, but observed sparking on the resistors of the new HV cable. The cable will be removed to take out the resistors, before reinstalling it.
The target hall was locked out, but has now been reopened. This was to avoid sparking to the HV cover. |
 Monday, July 17, 2017, 17:50, Aurelia Laxdal, Conditioning Station, Development, TM3, No target, Conditioning TM3
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| Anders Mjos wrote: |
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50 kV stable with less than 1 spark/h during the weekend by RIB obs.
Today 57 kV reached, but observed sparking on the resistors of the new HV cable. The cable will be removed to take out the resistors, before reinstalling it.
The target hall was locked out, but has now been reopened. This was to avoid sparking to the HV cover.
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EL was brought to 27.5kV. |
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Tuesday, July 18, 2017, 16:53, Anders Mjos, Conditioning Station, Development, TM3, No target, Conditioning TM3
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Conditioning continues today with resistors removed from the HV cable
Tuesday, July 18, 2017, 16:53: BIAS / EZL 50 / 25 kV - no sparks
Tuesday, July 18, 2017, 16:56: BIAS / EZL 55 / 27.5 kV - one spark
TM3 remained at 55 kV over night. Turbo pumps tripped twice and was restarted and HV recovered by RIB ops. Last recovery brought EZL to 16 kV (not 27.5 kV)
About 25 sparks over 15 h. No sparks for the last 3 h
Wednesday, July 19, 2017, 08:12: EZL to 27.5 kV
Wednesday, July 19, 2017, 08:38: BIAS to 57 kV
Wednesday, July 19, 2017, 08:46: BIAS to 57.5 kV
Wednesday, July 19, 2017, 09:05: BIAS to 59 kV
Wednesday, July 19, 2017, 09:19: BIAS to 60 kV
Wednesday, July 19, 2017, 09:28: EZL to 30 kV
Wednesday, July 19, 2017, 12:25: Heavy sparking. Lowered BIAS to 30 kV
Wednesday, July 19, 2017, 12:37: Increased BIAS again towards 50 kV, but heavy sparking again between 45 and 50 kV. Lowered back to 30 kV
Wednesday, July 19, 2017, 12:40: BIAS at 46 kV
Wednesday, July 19, 2017, 12:42: BIAS at 47 kV
Wednesday, July 19, 2017, 12:44: BIAS at 48 kV
Wednesday, July 19, 2017, 12:48: BIAS at 50 kV
Wednesday, July 19, 2017, 14:50: BIAS at 55 kV after ~2h without sparking at 50 kV
Wednesday, July 19, 2017, 15:12: Sparking. Lowered to 40 kV
Wednesday, July 19, 2017, 16:39: BIAS at 55 kV
Friday, July 21, 2017
Observed top of module inside target hall during HV sparks using crane cameras. No sparks observed, but some faint sound could be heard. Module still sparks at 60 and 55 kV. Have to lower to 40 kV to stop sparking.
Friday, July 21, 2017, 13:25: BIAS / EZL at 50 / 25 kV for without sparking for the last 90 min |
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Wednesday, December 19, 2018, 14:41, Anders Mjos, Conditioning Station, Standard Operation, , No target, Installed Shield Block on TCS
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Frank and Anders installed lid on TCS and started vacuum system yesterday. To run over the Holidays. Retrieved dose badge from operational storage area. Measured field to be ~ 10 mSv/h at ~9am. Beam went off about 8:30am. |
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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, January 20, 2022, 08:18, David Wang, North Hot-Cell, Standard Operation, TM4, No target, TM4 was removed from NHC to S_W silo yesterday.
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TM4 was removed from NHC to S_W silo yesterday. The remove is smooth and successful. |
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Thursday, January 09, 2025, 11:46, David Wang, Safe Module Parking, Standard Operation, TM4, No target, SMP is under vacuum for TM4 storage during shut down.
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SMP:MP1 is started with SMP BV1 is opened. SMP is under vacuum for TM4 storage during shut down. |
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Thursday, January 16, 2025, 14:21, David Wang, Conditioning Station, Standard Operation, TM3, No target, TM3 electrical check at TCS under good vacuum
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A complete TM3 electrical check at TCS under good vacuum has been done. Pin 14 to 60KV only has 8K ohm on ohmmeter check , and it's about 2Kohm @250V Megga. It's low in resistivity. The pin 14 is for thermocouples only so no big concern. The rest things are good. See attachments. |
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Tuesday, January 28, 2025, 11:47, David Wang, Conditioning Station, Standard Operation, TM3, No target, Tm3 has been moved from TCS to silo.
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Tm3 has been moved from TCS to silo. The move is successful. |
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