 Thursday, April 13, 2017, 11:44, Anders Mjos, Conditioning Station, Standard Operation, TM2, Ta#51, Conditioning Ta#51
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Thursday, April 13, 2017, 11:43: Water package started. |
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Friday, April 28, 2017, 12:04, Anders Mjos, Conditioning Station, Maintenance, , , MP1 problem
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TCS:MP1 was tripping of intermittently yesterday. It was found by Dave Morris that the current sensor was not set correctly causing the pump on status to flicker at times. Dave adjusted the settings yesterday. The system should be operational and is currently running normally. |
Wednesday, May 10, 2017, 13:42, Anders Mjos, Conditioning Station, Repair, , , Leaky gauge at TCS:TS2 (e-fault: 9609) 
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Neil Wong will fix this leak tomorrow Friday. See attached schematics for location. |
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Wednesday, May 10, 2017, 14:00, Anders Mjos, South Hot-Cell, Development, , ITE-Ta-LP-FEBIAD, Test target examination
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Chad and Anders inspected the test target in the hot cell today. The lid had been previously removed.
- The EE looked to have performed well.
- A piece of Ta foil was found inside the heat shield. It is not clear if this has been there during operation or if it entered the heat shield while in the hot cell. The foil has markings which indicate that it has seen heat.
- Travis measured 40 MOhm at 500V between heat shield and anode after the target was removed.
Photos are available on DocuShare |
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Wednesday, June 28, 2017, 16:43, Anders Mjos, Conditioning Station, Standard Operation, TM4, Ta#52, Conditioning Ta#52
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NEW HV cable for BIAS installed earlier this week.
Wednesday, June 28, 2017, 16:42: BIAS at 20 kV
Wednesday, June 28, 2017, 16:46: BIAS at 30 kV, EZL at 15 kV
Wednesday, June 28, 2017, 17:00: BIAS at 35 kV, EZL at 17.5 kV
The voltage response on TBHT and TGHT changed as the target was heated up. This was later determined to be due to target shorting to heat shield and the grounding of the power supplies being achieved at the HV pedestal in the target hall and not in the HV enclosure as is done online. When this was changed, the target operated normally again. |
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Thursday, June 29, 2017, 11:12, Anders Mjos, South Hot-Cell, Standard Operation, TM4, UC#20, Post Irradiation Examination (PIE)
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The target was inspected by Chad and Anders. Photos are available on DocuShare. It was noticed that the target tube heater terminals had lifted up from the insulator on the target assembly as seen in this Photo. This has later been detemined to be from the assembly, where additional clearance was required and achieved by installing washers. |
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Wednesday, July 05, 2017, 11:18, Anders Mjos, Conditioning Station, Maintenance, TM4, Ta#52, Changed electrical configuration to cathode bias
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John Chow configured TCS to cathode bias mode (IRH1538). The anode P/S is in positive mode. |
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Wednesday, July 12, 2017, 11:05, Anders Mjos, Conditioning Station, Maintenance, , , Testing of new high voltage cable
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The target hall has been locked-out as per Document-70039.
Forced IG1, IG1S and IG2 to switch on BIAS power supply
Wednesday, July 12, 2017, 11:53: 70 kV at 0.16 mA
2 sparks observed shortly after 70 kV was reached
Wednesday, July 12, 2017, 12:59: No sparks for the last hour.
BIAS power supply off. Forces removed. |
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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. |
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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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