 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. |
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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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Thursday, August 03, 2017, 17:08, Anders Mjos, Conditioning Station, Repair, TM2, , Power bump
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Thursday, August 03, 2017, 17:08: Restarting vacuum and water system |
 Tuesday, August 15, 2017, 09:27, Anders Mjos, South Hot-Cell, Standard Operation, TM2, SiC#36, Electrical Check of target in SHC
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| Travis Cave wrote: |
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The electrical check of TM#2 with SiC#36 attached. Post beam at the south hot cell. See attached results allow the before beam electrical check results are posted here as well.
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by David and Chad after target removed from module:
Anode to target @500V - 65Kohm
Anode to HS - dead short
Target to HS@500V -62Kohm. |
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Tuesday, August 15, 2017, 09:30, Anders Mjos, ITW, Standard Operation, TM2, Ta#53, TM2 radiation fields
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| Travis Cave wrote: |
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TM#2 with Ta#53 has been moved from the conditioning station to the west target station.
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by Travis (measured at ~ 2' from module on service tray side):
at 3' 325 uSv/h
at 2' 640 uSv/h |
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Friday, August 25, 2017, 16:33, Anders Mjos, Conditioning Station, Repair, , , Testing HV after cooling line repair
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The BIAS voltage was brought up to 70 kV today and held there for 1h. No sparking observed. |
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Thursday, September 21, 2017, 16:26, Anders Mjos, South Hot-Cell, Standard Operation, TM2, , Inspection of Source Tray
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Chad and Anders inspected the Source Tray today using the camera in the hot cell. A dark spot was observed on one of the four insulators separating the Extraction Electrode from the Ground Electrode. This could potentially influence the high leakage current. Some discolored areas were also observed in the Service Tray, but these was present when the module was built. See attachment for details. |
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Thursday, September 28, 2017, 15:34, Anders Mjos, Conditioning Station, Development, TM2, , Changes to MP3 startup
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Due to problems with the regulating valve WPV1, the VFD (Variable Frequency Drive) for the pump has been programmed to do a slow (2 min) ramp up. WPV1 has been bypassed and left fully opened. Work was done by Dave Morris |
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Thursday, September 28, 2017, 17:44, Anders Mjos, Conditioning Station, Standard Operation, TM2, Ta#54, Conditioning Ta#54
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Thursday, September 28, 2017
Cooling water not yet connected to TM.
High leakage current still observed. 200 uA at 22 kV. Did not go past 25 kV.
Friday, September 29, 2017, 14:05: Started heater ramping to 580 / 200 A at 1 A/min
Friday, September 29, 2017, 14:09: BIAS / EZL / EE at 20 / 10 / 1.5 kV. BIAS current at 90 uA
Monday, October 02, 2017, 10:29: Accidentally set BIAS current limit to 0 A (step size too large) at 28 kV. This also caused the TGHT to got to 0 A. Recovered to 580 A in 10 - 15 s.
Monday, October 02, 2017, 12:07: Ramping down heaters at 2 A / min |
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Thursday, October 05, 2017, 11:04, Anders Mjos, ITW, Maintenance, , , Installation of new valve for module move ventilation
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David installed the new ball valve and connections for the SAS project module move ventilation. SASP0482. Drawing reference ISK5029B. |
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Friday, October 06, 2017, 13:25, Anders Mjos, Conditioning Station, Repair, , , HV Test
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HV was brought up to 70 kV for 1 h without sparks to test the new water installation. |
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Wednesday, October 18, 2017, 14:54, Anders Mjos, Assembly/Bench Test, Standard Operation, , , Source tray assembly electrical check
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Source tray meggered today by Anders and Keith
GND - MSP OL @ 1000V
MSP - EE OL @ 1000V
EE - GND OL @ 1000V
4x Steerers - GND OL @ 500V
Steerer continuity verified from socket to steerer plates
(looking in the direction of the RIB, labeled top to bottom on sockets)
1 - Top
2 - Left
3 - Right
4 - Bottom |
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Thursday, October 19, 2017, 14:20, Anders Mjos, Assembly/Bench Test, Standard Operation, , , Source tray inspection
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Two minor chips in the main 60 kV insulators on the source tray was inspected today by Anders, Tom and Aurelia. The chips are small enough that they should not be a problem. See photos for details. |
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Thursday, October 19, 2017, 14:20, Anders Mjos, Conditioning Station, Standard Operation, TM4, SiC#37, SiC#37 Conditioning
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Thursday, October 19, 2017, 14:20: EE configured for conditioning. HV cage locked up
Thursday, October 19, 2017, 16:46: BIAS / EL / EE at 45 / 22.5 / 0 kV
Thursday, October 19, 2017, 17:16: 30 min without sparking. Lowering to 0. Continue conditioning tomorrow.
Friday, October 20, 2017, 08:22: Resuming HV conditioning
Friday, October 20, 2017, 08:44: BIAS / EL / EE at 45 / 22.5 / 0 kV
Friday, October 20, 2017, 09:48: No sparking. Continue conditionoing
Friday, October 20, 2017, 10:40: BIAS / EL / EE at 50 / 22.5 / 0 kV
Friday, October 20, 2017, 11:30: HV spark (at 52.5 kV) tripped TP2 and TP1s resulting in IG1S and power supplies tripping.
Friday, October 20, 2017, 13:50: Gelo is troubleshooting flickering on/off of ANODE, TGHT and TBHT power supplies.
Friday, October 20, 2017, 13:51: BIAS / EL / EE at 50 / 25 / 0 kV
Friday, October 20, 2017, 14:26: BIAS / EL / EE at 55 / 28 / 0 kV
Friday, October 20, 2017, 14:37: TP2 tripped on spark
Friday, October 20, 2017, 14:51: Gelo has determined there is a communication problem with the PLC on the HV platform. Troubleshooting continues.
Friday, October 20, 2017, 19:02: Troubleshooting did not succeed. Not able to control power supplies. Troubleshooting continue on Monday.
Monday, October 23, 2017, 09:00: After starting the TCS again today communication has been reestablished. Started heater conditioning.
Monday, October 23, 2017, 14:03: Heater ramping previously aborted and ramp down started due to ongoing PLC communication issues. TGHT and TBHT power supplies tripped on timeout around 13:45. Gelo will continue the troubleshooting.
Monday, October 23, 2017, 19:55: Switching off source after operating for 5 hours without any communication glitches detected (fiber optic communication cables swapped between HV platform and BIAS/EZL PLCs) |
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Thursday, October 26, 2017, 09:56, Anders Mjos, ITE, Repair, TM4, SiC#37, Leak on multi pin connector feedthrough
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On maintenance day Tuesday, the roughing of the target station could not go below 1.5 Torr. A brief troubleshooting on Tuesday was unsuccessful in determining the cause. Leak checking continued on Wednesday by David and Anders. A leak was finally found on the multi pin connector feedthrough due to the seal between the connector and flange on top of the nylon insulator. Upon re-tightening the connector, the leak could be stopped and the module pumped down to allow starting of turbo pumps. |
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Thursday, November 09, 2017, 08:46, Anders Mjos, Conditioning Station, Repair, , , Communication fiber replaced for HV PLC
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After extensive troubleshooting the communication fiber was found to be damaged and has been replaced by Gelo. |
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Thursday, November 09, 2017, 10:39, Anders Mjos, Conditioning Station, Standard Operation, TM2, Ta#55, Conditioning Ta#55
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Thursday, November 09, 2017, 10:40: BIAS / EL to 30 / 15 kV. 400 uA on BIAS
Bias was stable for 1 hour. Handed over to RIB ops for heater conditioning. |
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Wednesday, December 06, 2017, 09:33, Anders Mjos, Conditioning Station, Maintenance, , , Running chiller for maintenance tech
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Dakine is on site to do maintenance on the chiller. The tech requested the chiller to operate. |
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Wednesday, December 13, 2017, 15:32, Anders Mjos, Assembly/Bench Test, Maintenance, TM2, , Source Tray inspection
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The Source tray was inspected in the RH shop today by Anders, Friedhelm and Jens. The routing of the lines are satisfactory, however a design proposal to remove the ground electrode line will be made. This design will have to ensure a proper connection from the electrode to ground (using the window cooling lines). All other lines are OK at this point. Some fine adjustments are expected after brazing and soldering to maintain high voltage separation. Photos are available on DocuShare Collection-21401 |
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Tuesday, December 19, 2017, 10:41, Anders Mjos, Crane, Maintenance, , , Crane powered down
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The target hall crane has been powered down by Don today in preparation for the power shutdown over the Holidays. |
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