 Saturday, May 06, 2017, 13:30, Aurelia Laxdal, Conditioning Station, Repair, TM3, no target, TM3 current limiting
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Today the voltage was raised from 65kV to 65.7kV. After about 10min at this level TM3 started current limiting. TM3 was not sparking when this happened.
ISAC OPS turned it OFF and then tried to ramp it back ON, but could not do it due to the current limiting.
I turned OFF/ON the PS (locally) 20ming ago and and then tried to get it back from the Control Room, but around 4-5kV it started current limiting.
Turned everything OFF on EPICS for the time being. We'll investigate on Monday.
Over the night the sparking rate at 65kV was from 6 to 2 sparks per hour. It tripped OFF once over the night: backing valves closed, tripping the turbos, tripping IG1 and turning OFF the BIAS. At that time ISAC OPS got it back smoothly. |
Monday, May 08, 2017, 09:49, David Wang, Conditioning Station, Standard Operation, , , TH schedule 132 update weekly 
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Update TH schedule weekly to show the job process. |
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Tuesday, May 09, 2017, 07:00, David Wang, Conditioning Station, Repair, TM3, , Follow up Aurelia's entry, TM3 and TCS current limits investigation.
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Aurelia and I investigated this current limit issue May 8th. First, By separating TM3 from TCS. we found the problem is on TCS side. We did a Megga test on TM3 as well. TM3 is good at 1KV megga test. After that, The insulators between TCS to ground is test. they are good which could hold 1G ohm at 1000V megga test. So the problem should be on power supply side including power supply itself ,cables and transformer. Later, Tom and John found the TCS bias HV cable from power supply to HV chase top in faraday cage is broken down. It can not hold 5KV on HV test now. This cable should hold 100KV. But not this time. Tom also found the adapter on Faraday cage could be designed in a better way. The broken cable was removed yesterday. John and Tom will order an exactly same cable from Glassmen. |
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Tuesday, May 09, 2017, 12:45, David Wang, Conditioning Station, Repair, TM3, , TM3 service tray side panel is cleaned and installed back to TM3
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TM3 service tray side panel is cleaned and installed back to TM3 this morning. I visually inspected service tray insulators. Nothing is changed comparing to inspection before.Nine screws are installed on panel to hold it onto TM3. |
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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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Tuesday, May 16, 2017, 14:19, Travis Cave, Conditioning Station, Standard Operation, TM4, UC#20, module moved
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TM#4 with UC#20 has been moved from the south hot cell to the conditioning station. |
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Wednesday, May 17, 2017, 08:35, David Wang, Conditioning Station, Standard Operation, TM4, , TCS turbo pumps was started yesterday
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Anders started TCS turbo-pumps yesterday. The TCS and TM4 pumping down is good so far. I started TCS water pumps this morning for TCS water flow check.
2017-05-17 morning: Stopped the water pumps. The field around the TM4 is high because of spent target in SHC. The water flow measurement will be delayed to this Friday. |
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Thursday, May 18, 2017, 10:08, David Wang, Conditioning Station, Standard Operation, TM4, , TM4 TP1 at TCS
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TM4 TP1 was found making some noise during operation this morning. The current draw was check then. It was 1.8 A which is higher than 1.0A normal range. The pump body temperature was higher by hand feeling. But,1.0 hour later when checking again, everything on the pump goes back to normal. It is still fine so far. I will watch on this pump closely.
2017-05-19,morning. The TM4 TP1 stopped running last night. I tried to start it this morning. But, It can't pass 6KRMP even. I think we have to replace it. E- fault will be issued as well. |
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Thursday, May 18, 2017, 11:36, Travis Cave, Conditioning Station, Standard Operation, TM4, UC#20, Electrical Check
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Electrical check of TM#4 with UC#20 at the conditioning station under vacuum. See attached for details. |
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Friday, May 19, 2017, 12:25, David Wang, Conditioning Station, Standard Operation, TM4, , TCS and TM4 water flow measurement.
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TCS(LPM) |
Freq(HZ) |
TCS+TM4(LPM) |
Freq(HZ) |
| Ta |
5.5 |
106 |
3.7 |
68 |
| Tu |
5.6 |
107 |
4.3 |
79 |
| Coil(RU only) |
5.8 |
112 |
4.6 |
92 |
| HS |
7.0 |
13 |
6.6 |
12 |
| MSP |
6.4 |
21 |
5.8 |
21 |
| EE |
5.6 |
112 |
3.8 |
77 |
| Window |
4.5 |
81 |
4.3 |
78 |
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Friday, May 19, 2017, 13:49, David Wang, Conditioning Station, Repair, TM4, , TM4 TP1 at TCS
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TM4 TP1 is replaced. TCS and TM4 was argon vented before the job.The job took about 30minutes. I started the all turbo pumps after job. All pumps work fine. The TCS vacuum is good. |
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Wednesday, June 07, 2017, 13:33, David Wang, Conditioning Station, Standard Operation, TM2, , TM2 SiC#36 leakc check and electrical check.
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The results are good. See attachment. |
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Wednesday, June 07, 2017, 13:34, David Wang, Conditioning Station, Standard Operation, TM2, , TM2 and TCS vacuum system has been connected.
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I started all turbo pumps. |
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Thursday, June 08, 2017, 07:37, David Wang, Conditioning Station, Standard Operation, TM2, , Helium pressure test on TM2 water llines at TCS.
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The helium pressure test on HS line is done at TCS this morning. I got the same result as last time when we helium pressure it it with first target in April. The leak rate on this line is 1.8 XE-7atm.cc/sec. So, we know this leak is mostly on the line, but not on the VCR joints connecting the target. See attachment for last time(April) checking e-log. The leak could be from water block which is same as other lines. I do not think this leak rate will affect the operation.
The attachment can not be opened for some reasons. Please check TM2 leak check 2017-03-13 e- log for last time test result and comment. |
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Thursday, June 08, 2017, 08:35, David Wang, Conditioning Station, Development, TM2, , TM2 gas line reconfiguration on the module top.
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Reconfigured TM2 gas line on the module top. It matches with the febiad gas line we are using on service tray now. Facing the module, both of them should be that right side line of two SST lines on feed-through. The gas line on TM2 was leak checked with a blind cap installed on service tray side and LD connected on module top this Tuesday. It is leak free with helium spray on the top of module and service tray. |
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Monday, June 19, 2017, 07:29, David Wang, Conditioning Station, Standard Operation, TM2, , Update TH MS project schedule.
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Update TH MS project schedule. See attachment 1,2. |
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Tuesday, June 27, 2017, 09:14, Travis Cave, Conditioning Station, Standard Operation, TM4, Ta#52, Module move
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TM#4 with Ta#52 has been moved from south hot cell to the conditioning station. |
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Tuesday, June 27, 2017, 14:34, David Wang, Conditioning Station, Standard Operation, TM4, , TM4 vacuum has been connected at TCS
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Turbo -pumps are started . The vacuum looks good so far. |
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Wednesday, June 28, 2017, 09:14, Travis Cave, Conditioning Station, Standard Operation, TM4, Ta#52, Electrical Check
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Results of electrical check of TM#4 with Ta#52 at the south hot cell and the conditioning station under vacuum. |
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Wednesday, June 28, 2017, 10:00, David Wang, Conditioning Station, Standard Operation, TM4, Ta#52, TM2 has been connected at TCS
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I started TCS water system. |
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