TM#3 has been moved from the North West Silo to the conditioning station.

TM3 has been connected in CS. All water supplies are bypassed theTM3 on the top of the service cap. TM3 TP2 was difficult to start. It is started finally after couple of time try.The pump runs fine now. 

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.

I started TCS water system this morning to check if the chillers work properly.

TM3 TP2 stopped working this morning at 4:00 AM. I tried to start it but failed. On normal start mode , It could not pass 6K RPM. On soft start mode , the pump cant pass 17KRPM. Talked with Anders, We are not going to replace this pump since we are not going to run this module for a while. I will stopped all   vacumm pumps on CS and TM3 this morning.

TM3 has been disconnected at CS. It is vented and ready to move.

CS  vacuum system has been connected to TM3 for control system test(Dave.Morris).

TM#3 with no target has been moved from the conditioning station to the north west silo.

TM#3 is in the south hot cell it was moved from the north west silo.

TM#3 electrical check at the south hot cell, no target, all value are done at 1000Volts. See the attached PDF for the results.

David Wang and I did the service cap inspection in target hall: see WP I2015-10-06-10.<br>

Signs of sparking were seen underneath 3 insulators: E ("Cavity"), A ("Oven+") and B ("Oven -") at the pair water lines coming out of the  feed-through and going to the HV chase. Specifically one water line of E is very close to the feed-through insulator (2-3mm gap) and here the sparking sings are more prominent: see picture.

Bill and I moved TM3 from SHC to NW silo with a dummy febiad target installed on it. The move is smooth.

TM#3 has been moved from the north west silo to the conditioning station.

Friday, November 06, 2015, 14:35: Roughing

Turbos was started around 4pm. Later it was found that the manual valve for the two turbo pumps on the service cap was closed. The valve was open and pumping resumed. The roughing vacuum was high and increased into Saturday morning. The vacuum system was switched off on Saturday.

Purged MP1 using the purging function. Performance recovered. Started rouging.

Monday, November 09, 2015, 09:18: Started TP1S

Monday, November 09, 2015, 09:22: Started TP1 and TP2

Monday, November 09, 2015, 09:33: All 3 turbos at speed

Leak found on F/T for multipin connector

Tuesday, November 10, 2015, 09:53: stopped turbos

O-rings were replaced on the service cap by Anders, Maico, Aurelia and Keith under work permit  I2015-11-05-5    

 One of the wires for the steerers had come loose and was reattached by Maico. Photo on DocuShare

Service cap leak checked this afternoon. Found multiple leaks of 10E-8 to 10E-7 range. Connected to the backing line with IG1 at ~4E-6 T, CG1A around 40 mT. Got responses around large round flange on top, rectangular side panels, water f/t on GND and water f/t on HV. Will resume leak checking tomorrow to attempt to pinpoint sources of leak more accurately.

Conducted a more thorough leak check this morning with Edi. He found a leak on the base of the  blue F/T insulator for the multi-pin connector (see attachment). I discovered that all the bolts could rotate freely in the threads as they were too small. The bolts were replaced. The leak rate was reduced but still significant. The o-ring will likely need to be replaced.

Tuesday, November 10, 2015, 17:00: Could not find new o-ring. Cleaned groove and o-ring and applied o-ring grease. Re-attached F/T.

Tuesday, November 10, 2015, 16:53: Roughing

Tuesday, November 10, 2015, 18:24: TP1S started

Tuesday, November 10, 2015, 18:30: TP1 and TP2 started

Tuesday, November 10, 2015, 18:41: All 3 turbos at speed.

Thursday, November 12, 2015, 08:30: Purged backing pump using purging function. Vacuum in backing line recovered to previous value. 

Module connected for HV testing. No target heating possible. All F/Ts tied together to HV common. EZL connected.

Friday, November 13, 2015, 11:20: Started water package

Friday, November 13, 2015, 11:52: 1kV on BIAS and 1 kV on EL

Friday, November 13, 2015, 12:54: BIAS/EL 10 / 5 kV

Friday, November 13, 2015, 12:59: BIAS/EL 15 / 7.5 kV

Friday, November 13, 2015, 13:04: BIAS/EL 20 / 10 kV

Friday, November 13, 2015, 13:08 : BIAS/EL 22 / 11 kV. Some sparks.

Friday, November 13, 2015, 13:17: Sparking at 22.5 kV. Had to return to 20 kV to recover. Back at 22.5

Friday, November 13, 2015, 13:21 : BIAS/EL 24 / 12 kV. 

 Friday, November 13, 2015, 13:27: Heavy spakring around 24.5 kV. Had to return to 20 kV to recover.

Friday, November 13, 2015, 13:31: Attempted to increase voltage again. Sparking started around 23 kV. Had to lower to 20 kV.

Friday, November 13, 2015, 13:36: 9 sparks for the last 5 min.

Friday, November 13, 2015, 13:45: Spark rate reduced, but multiple sparks encountered again at 20.5 kV. Reduced back to 20 kV

Friday, November 13, 2015, 13:50: Increased sparking at 20 kV. Had to lower to 18 kV

Friday, November 13, 2015, 14:07: Back at 20 kV

Friday, November 13, 2015, 14:13: BIAS and EL off

Monday, November 16, 2015, 08:18: Fault on chiller. Reset chiller unit on the roof.

Anders Mjos wrote:

Conducted a more thorough leak check this morning with Edi. He found a leak on the base of the  blue F/T insulator for the multi-pin connector (see attachment). I discovered that all the bolts could rotate freely in the threads as they were too small. The bolts were replaced. The leak rate was reduced but still significant. The o-ring will likely need to be replaced. Tuesday, November 10, 2015, 17:00: Could not find new o-ring. Cleaned groove and o-ring and applied o-ring grease. Re-attached F/T.

Tuesday

Steerer wire had disconnected again. See DocuShare for photos.

Thursday, November 12, 2015

Leak checked the fixed F/T and the panel for steeerers. No leaks found.

Target to Anode and target to Common showed ~ 500 kOhm values. No leaks above 3E-9 atm-cc/s seen. See attached.