The Model of the Power Supply (PS) is TSQLG 480-20/1500 and serial number is 2755.02.01.01.09.

We went to test the PS and supplied the required 480V and turned the local switch to on. At this point nothing happened, the controls screen didn’t light up nothing. We tried to run the PS in remote mode as that is what it had previously been set at and again there was no response. At this point I called the electrician the check that we were in fact supplying 480V. He checked all the way to the contactor inside of the PS (see attached picture). He also checked the 3 larger fuses and 6 smaller ones, they have not failed.

I have inquired with Jens Lassen who is more familiar with these PS and he has not had this issue before. He is going to have another look at the PS with the electrician specifically checking the 24VDC for the control board. Any further information or checks you could provide would be very helpful.

 This PS is needed for commissioning of a system and unfortunately this failure has come at a very in opportune time.  Although the PS is show to be several years old we have not actually used it aside from some minor tests ie does it turn on (it has previously).  I have phoned the manufacture to determine what else can be check and what the next steps are. Werner requested that I send an email (completed) so he could give it to their engineers.

 Over the weekend Turbo pump one failed. It was attempted to restart the turbo in soft start but that also failed. Although the Vacuum was good enough to operate both Turbos are required to pass commissioning. As such the pumps were turned off at ~10:00 today. Venting started at 12:00.

Bevan Moss wrote:

The cooling package was started at 10:00 today. See attached picture. There is another snap shot at 10:03.

 The conductivity of the cooling package is above 5Mohm which is the minimum limit for the PS. This was achieved at 11:55. See attached picture.

 Turbos started at 11:14. TP1S achieved full speed in less than 2 minutes. TP1 and 2 tripped at 9 minutes. Restarted and reached at speed after another 1 minute 20 seconds.

 The cooling package was started at 10:00 today. See attached picture. There is another snap shot at 10:03.

It took a long time(more than 1 hour)   to pump down the TM4 window  cooling line during leak check time. The base leak rate could only be pumped to 5.8xE-9 atm.cc/sec.Base pressure is 0.0xE-4 torr which is bottom reading. Chad and i did the leak check at this base leak rate .No leak had been found. The window cooling line is leak tight at this stage. A pressure helium test will be fulfilled in conditioning station on this cooling line later.

TM4 electrical test at SHC after windown and containment box back is done. Everything is fine.

 Roughing pumps were turned on at 15:23 13/03/2013.

 TM4 with CS Test Target #1 was moved from the SHC to the Conditioning Station. All went well. The welding cables came a little close to the cage, David will bend them in more in the future.

 Dave Morris and I investigated the Faraday Cup today. It was found to be plumed in the wrong direction (fails in). This is not an issue for the conditioning station as there is nothing down stream from the cup. Dave will change the controls to reflect this.

The containment box has been re-installed and the window waterlines reconnected and leak checked.

The window lines did pass the leak check, however the leak dectoctor did not pump down past 5.8 x 10-9.

The front cover has also been reinstalled.

I have requested that the module have an electrical check before it moves as the containment box has been off as well as the water blocks being leak checked. Either one of these procedures could causes the water liunes and blocks to alter there position sightly which could cause as short...this is why I have requested an electrical check.

Further attempts to localize the leak were unsucessful. The circuit was pressurized with 60 psi air and snoop solution was applied to both the braze joints and the mating surface between the two halfs of the water blocks. Unfortunately, no visible bubbles could be dectected.

This was reported to Grant and Pierre and it was decided to continue with removing one of the vcr gaskets from the optics cooling lines (on the same circuit) and replacing it with a gasket with a sector cut out to allow this circuit to be pumped out and eliminate any virtual leak type response. The feedthru at the service cap will be capped.

Areas that had snoop solution on them were rinsed with methonal.

A cursory inspection of the extraction column was preformed and some pictures of the back side of the mounting plate and surrounding area were taken as there was some interesting discoloration found in the area below the back of the 9 pin connectors.

Picutres of the snoop procedure can be found at https://documents.triumf.ca/docushare/dsweb/View/Collection-9994

On Monday, March 11 the containment box was removed from TM4 and a vacuum leak check preformed in an attempt to locate the leak in the ground electrode circuit.

Following Pierre's work plain helium was sprayed was the highest joint accessible towards the lowest.

A two second spray of helium was applied to the first joint (the reducer from the service tray to the line that goes to the service tray side of the water block connection), no response from the leak detector after 1 minute.

 two second spray of helium was applied to the braze joint of the servive tray side of the waterblock connection; almost immediate response from the leak detector (see David Wand for actual values for leak rate).

The inital joint at the reducer was rechecked to insure the response was not just a risidual slow response from the reducer joint and confirmed by no response after 2 miniutes that it was not.

The braze joint at the service tray block was then tested again with a two second spray and again almost an imediated response.

A meeting was conveined and decided to pressurize this circuit with air and apply snoop solution to the suspect area to try to identify wether the leak is in the braze joint or possibly c-seal...This will take place on Tuesday, March 12th.

 Today David and I moved the module from ITE to the SHC. Move went very smoothly, David operated the cameras and has had basic training in how to manually lock out the controls.

ITW EX1 have been moved back to the west target station from the south hot cell.

ITW EX1 has been moved from the west target station to the south hot cell for the seal replacement on the west station.

Bevan and I replaced TM4 TP1 today at conditioning station .The pump will be started this week when I do ITE and TM4 leak check .

TM#4 with CS Test Target #1 (dummy target) moved from the conditioning station to the east target station. Move went well.