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

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.

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

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.

 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.

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

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.

I leak checked new installed TM4 TP1 at conditioning station. The CS vacuum gauges reading were at 1.0-1.5xE-6 torr . Leak detector base leak rate 0.0xe-9atm.cc/sec, base pressure 0.0xe-4torr. I sprayed helium around the pump  inlet flange and KF 25 pump outlet flange to pump joint. There is no response on leak detector. The new installed TP1 is leak tight.

I leak checked new installed ITW EXIT1 tank to module o-ring.No leak had been found . Also ,TM1 primary vessel air to vacuum seals had been checked at the same time. There was no response had been found on leak detector.

New gaskets and fasteners have been inserted into the south hot cell in preparation for installing the dummy target onto TM3 tomorrow.

Front containment box cover has been removed and heat shield circuit blank offs removed in preparation for installation of dummy target.

 image #1 - initail view after front panel removal.

image #2 - Heat shield circuit blank offs removed.

Ready for baseline electrical tests and 9 pin cinnector tests.

The heat shield circuit blank offs have been re-installed and front cover replaced. TM3 is ready to move to the conditioning station for testing.

5 shielding block had been moved  back to ITE. The ITE is configured to take proton beam.

TM3 leak check at conditioning station without target: TM3 all air to vacuum seals have been leak checked . They are all good. Water lines TAR(+-), TUBE(+-), GAS, MSP , COIL2(+-), EE, HS(1,2) , GE,and WINDOW have been helium pressurized to 70 psi for 2 minutes each . No response had been found on leak detector. They are leak tight.. Leak detector BR 0.0xE-9atm.cc/sec, BP 0.0xE-4 torr. TM3 and CS vacuum: PNG15.2xE-6 torr, IG1 8.8xE-7 torr,IG2 2.8xE-6torr, IG1S 1.3xE-6 torr.      

 Controls has created a new user group that can operate the conditioning station but cannot use any of the bypasses or forces. The cooling package will be used to test this new profile. The main loop bypass has been opened to allow this testing to happen without the risk of over pressure.

The F-308's have been serviced and are ready to be filled. All inspection records are stored  in docushare.

https://documents.triumf.ca/docushare/dsweb/View/Collection-1085

Work on TM3 source tray removal started at 10:40 am today.

The containment box has been removed, and disconnection of the optics tray is 90 complete.

Pictures can be found in the April Refurb Work Folder in the tm3 rev3 refurb pictures folder.

Optics tray has been removed from module.

Waterblock jig installation has commenced. Of note, jig installation on TM3 has proven more dificult than the previous installation on TM2. Many of the waterblock assemblies are skewed (not perpendicular to plane that they should be...perpendicular to).

As I am away tomorrow, jig installation willl continue on Friday. With the source tray hopefully being removed on Monday.

The back half of the water block jig (services tray side) has been sucessfully located onto the module.

About 50% of the waterblocks have centered themselfs it their respective cups and the rest look good for concentricity but will require some gentle wiggling to get them to seat.