UCx#19 has been removed from TM4 and UCx#20 installed.

UCx#19 still had water in it at pressure and sprayed when the VCR was undone. It was quickly re-tightened but not before significant water pooled beside the main Mykroy standoff and table. Contacted Anders would suggested to soak it up with some wipes and continue, which I did.

New target fasteners including high current. High current fasteners torqued to 130 in lbs.

TM#4 with UC#20 has had the electrical check done on it  at the south hot cell, see attached for details

TM#4 with UC#20 has been moved from the south hot cell to the conditioning station.

Chad and I finished leak check on HS line with UCx target installed on it.  Base Leak rate:0.0X 10^-9 atm.cc/sec, Base pressure 0.0X 10 ^-4 torr.  Sprayed helium to VCR joints.   No leak has been found . The line will be pressurized with helium at TCS.

 Helium pressure test on TM4 HS line is done at TCS. BLR 0.0XE-9 atm.cc/sec. 70psi helium , 2 minutes. No response. The line is leak free.

Anders started TCS turbo-pumps yesterday. The TCS and TM4 pumping down is good so far. I started TCS water pumps this morning for TCS water flow check.

2017-05-17 morning:  Stopped the water pumps. The field around the TM4 is high because of spent target in SHC. The water flow measurement will be delayed to this Friday.

TM4 TP1 was found making some noise during operation this morning. The current draw was check then. It was 1.8 A which is higher than 1.0A normal range. The pump body temperature was higher by hand feeling. But,1.0 hour later when checking again, everything on the pump goes back to normal. It is still fine so far. I will watch on this pump closely.

 2017-05-19,morning.  The TM4 TP1 stopped running last night.  I tried to start it this morning. But, It can't pass 6KRMP even. I think we have to replace it.    E- fault will be issued as well.   

Electrical check of TM#4 with UC#20 at the conditioning station under vacuum. See attached for details.

TM4 TP1 is replaced. TCS and TM4 was argon vented before the job.The job took about 30minutes.  I started the all turbo pumps after job. All pumps work fine. The TCS vacuum is good.     

 TM#4 with UC#20 has been moved from the conditioning station to the east target station.

Yasmine and I connected TM4 in ITE . All turbo pumps are started.

 TM#4 with UC#20 has been moved from the east target station to the south hot cell. Also the shield plug was remotely installed as well after David set it up.

UC#20 has been removed from TM4 and put in a bucket back-filled with argon. Ta#52 has been installed onto TM4 with new fasteners. High current torqued to 130 in lbs.

 TM#4 with Ta#52 has been moved from south hot cell to the conditioning station.

LD base LR:0.0Xe-9 atm.cc/sec. No leak has been found during the check.  The HS line will be helium pressurized at TCS this week.

Helium pressurized the HS line at TCS. 70 psi 2 minutes, 0.0 x E-9 atm.cc/sec. No leak.

Turbo -pumps are started . The vacuum looks good so far.

Results of electrical check of TM#4 with Ta#52 at the south hot cell and the conditioning station under vacuum.

I started TCS water system.

NEW HV cable for BIAS installed earlier this week.

Wednesday, June 28, 2017, 16:42: BIAS at 20 kV

Wednesday, June 28, 2017, 16:46: BIAS at 30 kV, EZL at 15 kV

Wednesday, June 28, 2017, 17:00: BIAS at 35 kV, EZL at 17.5 kV

The voltage response on TBHT and TGHT changed as the target was heated up. This was later determined to be due to target shorting to heat shield and the grounding of the power supplies being achieved at the HV pedestal in the target hall and not in the HV enclosure as is done online. When this was changed, the target operated normally again.

The target was inspected by Chad and Anders. Photos are available on DocuShare. It was noticed that the target tube heater terminals had lifted up from the insulator on the target assembly as seen in this Photo. This has later been detemined to be from the assembly, where additional clearance was required and achieved by installing washers.