Chad and I leak checked TM4 HS water line with SiC #31 target installed. leak rate:0.0xE-9atm.cc/sec.  No leak.  The line will be helium pressurized at CS later.

2015-06-03, helium pressure test the line at CS. 70psi 3 minutes. leak rate 0.0xE-9 atm.cc/sec. No leak.   See attachments

Chad and I leak checked the HS line at SHC after UCX target installation. On first round helium spray, one of VCR fitting has a leak to E-6 atm.cc/sec range. Chad tightened the fitting, and solved the problem. We leak checked both VCR fittings twice. No leak. The line will be helium pressured at CS tomorrow.

Chad and I leak checked the HS line at SHC. No leak. Leak rate 0.0xE-9atm.cc/sec.

Chad and I leak checked the TM3 HS water line with new target installed.  No leak has been found during the check. Leak detector base LR 0.0xE-9 atm.cc/sec, base pressure 0.0xE-4 torr. The line will be helium pressurized at CS later.

Chad and I did the leak check on TM2 tube heater (+) water line  with blank off( + elastic o ring seal) installed on "D"  water block in SHC. We got the same no leak result as we got with rubber insert this morning.

Chad and I did the leak check   on TM2 tube heater (+) water line  with blank off and C-seal  installed on  WB at South Hot Cell.The line was easy to pump down to 0.0xE-9atm.cc/sec and 0.0XE-4 torr on leak detector. Chad flushed lot helium around the water block (10 sec spray). No response had been found on leak detector.

Chad and I leak checked TM2 HS and window circuit VCR joints with ZrC target and containment box installed at SHC. No leak has been found. They will   be helium pressurized  at CS later.

I did a leak check on TM1 window circuit  2 soldering  stems in service cap.The round side panel was opened for the job. I sprayed helium on the stems for 10 seconds. The leak detector got a tiny response(from 0.0xE-9 atm.cc/sec to 2.0xE-9 atm.cc/sec). The test  repeated again. The second time, LD climbed  to 1.2xE-9atm.cc/sec. It looks like there is a very tiny leak on the stems soldering spots. But , this is not the same leak we found from SHC helium spray which LD climbed to 1.4xE-8atm.cc/sec with only one click helium spray by Chad.

 Because of the high air flow at SHC when the round panel is removed, The result is not conclusive. The same test is done at silo without  airflow. We found a big leak on this soldering stems . See later e-log.

Chad and I leak checked HS line on TM1 with ThO#1 target installed. The LD pumped down to base leak rate 0.0xE-9 atm.cc/sec, base leak rate 0.0xE-4 torr. The pumping down process is normal. Chad sprayed helium on both VCR joints (each for 2 seconds) , and he did a flush spray around the target for 5 seconds. No any response had been found on LD during and after the spray( 40seconds waiting time). The target is leak tight.

Chad and I leak checked TM1 HS and UC9# VCR fittings. No response had been found on leak detector during the test. I will do helium pressure  test on it at CS later.

Chad and I leak checked TM1 HS waterline with new target installed at SHC. The LD base LR:0.0xE-9atm.cc/sec, base pressure: 0.0xE-4 torr. Chad sprayed helium on both VCR fittings and flushed helium around the target. No response has been found on leak detector. The target HS line is leak tight so far. I will do helium pressure test on this line at CS on next Monday.

Chad and I  leak checked the TM1 HS line with new target installed. Base leak rate 0.0xe-9 atm.cc/sec. No any response has been found on LD. The line will be pressurized at CS with helium tomorrow.

 TM1 with UC#2 had the target installed, the heat shield line was pumped on and achieved a vacuum of 0.0 x 10^-4 Torr and a  leak rate of 0.0 x 10^-9 atm cc / sec with no response when sprayed with helium. An electrical check was completed by David and myself all values were withing tolerance.  The module was then moved from the south hot cell to the conditioning station where it will start pump down. The move was uneventful every operated as it should and there were no crashes minor or large. It was attempted to fill the containment box with argon prior to closing it but assuming that didn't work I estimate the target was exposed to air for a total of ~4 hours during installation and move. 

Today a leak check on TM1's external seals and the heat shield line was completed by David Wang. After 16 hours of the turbo pumps running on the conditioning station stations pressures were 3.6 x 10^-6 T, 1.2 x 10^-5 T, and 1.8 x 10^-6 T for the containment box, secondary vacuum, and service cap respectively. This is a significantly quicker pump down after the cross with small turbo pump was installed on the vacuum vessel. The base pressure of the leak testing cart was 0.0 x 10^-4 T and the leak rate was 1.2 x 10 x 10^-8 atm cc / sec. There was no response from the external test where the module was sprayed with helium. The heat shield line was pressurized with 80 psi helium which caused the leak rate to climb to a maximum of 2.5 10 ^-8 atm cc / sec but dropped to 1.9 x 10^-8 atm cc / sec and was stable there, the total test time was 2 minutes. This test was repeated another time and had similar results.  These results although showing a slight increase in the detected leak rate are withing acceptable and indicate that the module is leak tight. 

At 9:30 the HV check and conditioning started (~17 hours turbos on), the secondary vacuum, containment box and service cap had the following pressures in Torr respectively, 1.0 x 10^-5, 3.2 x 10^-6, 1.6 x 10^-6.  The voltage was steadily raised with virtually no current up to 28.5 kV which was achieved at 9:50. When raised to 30 kV the current increased significantly to ~300 uA and a large amount of sparking occurred. The voltage was dropped to 0 volts for 2 minutes and then was returned to 30 kV at 10:03, the current draw was around 200 uA and climbing. After a few sparks and time the current had dropped to 120 uA. This indicates that the module is still conditioning and matches what is observed by the control room when the module is in ITW. The module was deemed acceptable for this current run and was then vented with argon this took about 2 hours.

The module was then remotely moved from the conditioning station to ITW. When first attempting to transfer the controls to the remote control room they were not transferred and when testing the up command as per standard procedure the module dropped down slightly. David Wang went to lock out the target again and the controls were successfully transferred. A note of this was made in the log book. Apart from this the move went smoothly.  

A leak check was performed on the module on October 27/10/2011 by David Wang and was reported to Bevan Moss but it never made it into the Elog system. This entry is to summarize the results of that testing. All circuits were pressurized to 80 psi with helium and every line except the tube heater (+) showed no or small responses as experienced before. The tube heater line had a slightly larger response under the conditions summarized below:

Varian 959

Base Pressure                   7.0 x 10^-3 Torr

Base Leak Rate                  7.5 x 10^-9 atm cc/sec

Gauges

IG1                                         2.0 x 10^-6 Torr

PNG5                                    9.6 x 10^-6 Torr

PNG4 (C.S.)                        2.4 x 10^-5 Torr

Convectron (Back line) 20mTorr

 The leak rate quickly climbed to 3.0 x 10^-8 atm cc/sec then constantly climbed to 1.4 x 10^-7 atm cc/sec for 2 minutes. David repeated this test again at the end of the leak test and found the same results. In the past we have called this a leak and attempted to find its location and repair it. David believes that this isn’t a real leak as we have been able to achieve very good vacuum on TM4 all year and that we do not normally touch the feed through stem on this circuit. This result makes me nervous as the total differential is roughly the same as that we found on the UCx#2 run(which was at a higher vacuum).

The result of this test caused the module to move back to the hot cell for further more localized leak checking.

 A leak check was performed on the module when it was in the conditioning station today. There were no external leaks found. When the coolant lines were check a small leak was found in the heat shield circuit. Base leak rate was 6.7 x 10^-9 atm cc /sec and rose to 4.1 x 10^-9 atm cc /sec quickly (~3 seconds) and remained there for the 2 minute test. The remaining lines had small responses as usual but the highest response was in the low 10^-8 atm cc /sec range. The pressures were recorded as 1.2X10^-6 T, 2.7 x 10^-6 T and 1.1 10^-5 T in the service cap, containment box, and secondary respectively. The module was then vented with argon which took ~1.5 hours, vessel was pressurized to ~ 1 psi. A panel was then removed to leak check the feed through stem of the heat shield pressure of the line was recorded to be 0.0 x 10^-4 T and a leak rate of 1.3 x 10^-8 atm cc/sec was achieved. The stem was sprayed and no response was found. Swipes of the were taken of the panel (150 counts) and the containment box (3000 counts). The panel was then returned and the vessel roughed out for the weekend, it will be vented and moved to the south hot cell on Monday where the VCR fittings will be checked again and then tightened.  

All water circuits except Coil 1 were leak checked by David and Anders. No obvious signals were detected except some small possible responses. See attached notes for details.

Link to previous target information: https://elog.triumf.ca/TIS/RH-ISAC/1039

Monday, March 25, 2019, 10:00: Target electrical checks (See Attachment 1)

Tested for TM2 

 A copper bar jumper (ITD0488) was installed on the TGHT, TBHT and COIL conductors on the taregt hall side for TCS testing.

Jig for installation of target through hot cell roof has been assembled and placed in the target hall.