Tray with loop and beam shield has been inserted into the hot cell to be installed on TM4 .

I switched off TM2 and TCS vacuum pumps. The TCS and TM2 will be under vacuum without pumping.

I did a helium pressure test on TM2 water lines at TCS. We will remove the TM2 source tray soon so this test is a reference check for future new source. The result:

Helium 70 psi, 2 minutes to each circiut. Leak detector  base LR.0.0x e-9atm.cc/sec, base pressure  0.0x e-4torr

Ta+(A)  0.0x e-9atm.cc/sec

Ta-(B)  0.0x e-9atm.cc/sec

Tu-(C) 7.8x e-7 atm.cc/sec

Tu+(D) 3.5x e-7 atm.cc/sec

Coil 2(PU) 0.0x e-9atm.cc/sec

Coil 1(RU) 0.0x e-9atm.cc/sec

EE 8.2 x e-9atm.cc/sec

MSP 0.0x e-9atm.cc/sec

Containment box window  0.0 xe-9atm.cc/sec

HS  no target and opened. No test.

All water lines on module side in TM2  should be in good condition according to this test . The leak response we found on B and C lines are from water block seals mostly.           

 SiC#37 has been moved from the South Hot Cell to the Spent Target Vault. It was placed in Pail #165 and put in spot 3B of the vault and it measured 25.8mSv/hr upon removal from the hot cell. See the attached PDF for details

TM#2 has been moved from the south hot cell to the conditioning station.

Attached alignment check notes after brazing and fabrication.

First page lower half shows establishment of baseline using master jig

Second page top half shows the alignment of the target mounting plate jig and the steerer cone aperture.

Second page bottom half shows alignment of the master target jig. Master target jig needed the 9 pin and heat shield locating features removed to seat the target correctly.

Overall, source tray assembly sits .006" high on average (min .003", max .010"), .003" to the left with respect to ion beam axis.

 TM#4 has been moved from the south hot cell to the east target station, and TM#2 has been moved from the south silo to the south hot cell.

The new module move ventilation procedure was successfully tested (ITM:MP2). ITM:CM4 did not drop below 6 in during the test.

The optics tray has been removed from TM4.

 TM#4 with no target and no containment box has been moved from the conditioning station to the south hot cell.

Link to e-log,

Link to efault

Tank level down from 76 to 55 in on TK1

Valve replaced by Curtis today

At 8:50 AM today, I applied water to TM4 tube heater - (B) line at TCS. All high vacuum gauges got response on this action. Water is leaking through B line on TM4.

It should be D line . David 2018-06-05

 The west entrance module has been moved from the silo to the west target station.

BIAS only. Water lines looped on top. Containment box off.

Thursday, May 17, 2018, 11:20: Vacuum 7.2E-7 Torr

Thursday, May 17, 2018, 11:30: 10 kV

Thursday, May 17, 2018, 11:42: 20 kV

Thursday, May 17, 2018, 12:14: 25 kV

Thursday, May 17, 2018, 12:35: 30 kV

Thursday, May 17, 2018, 16:13: 35 kV

Thursday, May 17, 2018, 17:339: 37.5 kV

Thursday, May 17, 2018, 17:40: vacuum 6.8E-7 Torr

Thursday, May 17, 2018, 18:13: BIAS off.

  Helium pressure test on TM4  water lines is done this morning. 70 psi helim , 1 minutes time to each circle. The result:

A(oven+): 0.00xE-9 atm.cc/sec

B(Oven -): 8.1Xe-7 atm.cc/sec

C(tube -): 0.00xE-9 atm.cc/sec

D(tube+): 1.0xE-5 atm.cc/sec

PQ(coil 2): capped on top. water lines were removed because of leak

RU(Coil1): 0.00xE-9 atm.cc/sec

EE: 0.00xE-9 atm.cc/sec

MSP: 0.00xE-9 atm.cc/sec

HS: No target, capped on top. It was fine on last target check in 2017 Oct.

window: Capped on top. Containment box is not installed.

The leak check on D line caused the IG1 small response during test.

B and D circle are double checked. The reasults are same.

D line leak is in E-5 atm.cc/sec range. It is possible to locate it by using helium spray method in SHC. The containment box is not on so it should be easy to do it.

Switch on IGA gauge at TCS and apply helium and water at certain psi to check the IGA response may give us more information on these leaks.

 All lines were test in last year shut down. They were good.

 TM#4 was moved to the conditioning station from the south hot cell. The module was moved with out the containment box.

Leak detector is connected to ITW TP4. LD Base leak rate 0.0XE-09 atm.cc/sec. Helium line is connected to existing window leak check 1/8 " copper tube. Applied 18psi helium for 1 minute. No response on LD. The window seal is good on ITW vacuum vessel. 

Anders Mjos wrote:

Yesterday Aaron, Isaac and Anders inspected the EZL connection from the service chase to the optics tray using the goose neck camera in SHC. No issues or shorts could be identified. Containment box was not removed. Today David and Anders opened up two panels on the service cap and inspected the EZL connection. No issues or shorts could be identified. Photos available on DocuShare. Next step will likely be to remove the containment box and inspect the optics tray.

The containment box was removed yesterday. One of the main insulators on the source tray had cracked at the rear close to the bolt to the source tray mounting plate (see photos using link above)

Troubleshooting continued this morning with disconnection of the optics tray from the module. The banana plug copper tube connection was removed form the optics tray side. With the connection removed, the measurement showed open line on top of the module indicating that the problem is on the optics tray

Anders and I leak checked new 2A2 window seal on ITW side. Leak detector was connected  to ITW TP4.  Base  leak rate 0.0Xe-9 atm.cc/sec. base pressure 0.0xe-4 torr.  Sprayed 15-20 psi directly underneath 2A2 window by using exist 2a2 window leak check copper tube. The leak detector got response in 5 seconds when helium was applied. the leak rate was 5xe-6 atm.cc/sec. Once the helium source was closed, the leak rate dropped quickly back to base level. To confirm the leak is at window , I sprayed 15 psi helium around all top flange seals of TM and entrance module.  There was no direct response during the spray( about 1.5- 2 minutes). There was a weak slow up response (up to 1.0 xe-7 atm.cc/sec) which was started after 1.5 minutes of spray. The weak response is cause by helium drift in my view.   Our conclusion is the 2A2 window seal on ITW side is not perfectly sealed.  The elak we saw on LD is ture , and it is located on window.  The station will be vented soon for shielding plug moving back. .

Yesterday Aaron, Isaac and Anders inspected the EZL connection from the service chase to the optics tray using the goose neck camera in SHC. No issues or shorts could be identified. Containment box was not removed.

Today David and Anders opened up two panels on the service cap and inspected the EZL connection. No issues or shorts could be identified. Photos available on DocuShare.

Next step will likely be to remove the containment box and inspect the optics tray.