TM#1 has been moved from the North West silo to the conditioning station.

I started two turbo-pumps on TM1 and one small TP on TCS. They are work fine. 

TM1 inside service cap surface and shielding plug surface are visually inspected yesterday. No rust has been found. I cleaned all rust on top of TM1  today.  Rust on TM1 silo  top plate are cleaned as well.

Installation by Marshall. Dave M from controls adjusted circuitry to get TCS:MP1 to start.

Work is being done in preparation for the Module Move Ventilation SAS project

Results of an electrical check on TM#1 with no target attached to it.

 I use this e-log entry for TM1 notes as well  1. TM1 IG1 is a dual filament gauge . Its filament is very close to grid now. It shorted one time during the pumping down. It still works fine so far . But, we may need to change it if we use this module in TS again.

TCS 1G1 and 1G1S are pumped to 5Xe-6 torr. IG2 stayed at 2.5XE-5 torr. Since no target is installed on module , I capped top of HS water line. Maybe, the small o-ring seal in cap is too old, I found a big leak on this seal when i use LD check it. That is the reason IG2 stayed too high. Still, Leak check and helium presuure test are fulfilled on TM1. Leak detector BLR 5XE-7 atm.cc/sec, BP 0.0XE-4 torr9.  Back up pressure is 51 mtorr which is high because of leak on HS line cap seal so LD BLR is high. At this level, Ta+-, Tube +-, MSP,  EE are good.  Other air to vacuum seal are good as well at this leak rate.  I will check and change small o-ring seal in HS cap. The TM1 is functional basically.

 TM#1 has been moved from the conditioning station to the north west silo.  There was a slight delay in the move as the limits for the hoist drum got way out of whack and had to be adjusted.

TM#2 with Ta#51 has been moved from the south hot cell to the conditioning station.

Chad and I did leak check on TM1 HS line at SHC. 0.0XE-9 atm.cc/sec.  No leak.

Roughing down overnight. Turbo pumps are started this morning. Everything looks good so far.

LD  BLR :0.0 X E-9 atm.cc/sec. BP:0.0XE-4 torr. helium 70 psi. 3 minutes on each circuit

There is a smallleak HS which we did not see before. The HS is checked in SHC  with helium spray yesterday. We did not see the leak . We checked this HS line every time when new target was installed. So mostly, this small leak is from VCRs connected to new target. But, we can not confirm it.  Still this line will be checked on next new target. We should have a better understanding when checking next time.  Other line are almost same as we checked in last year November. I did not see essential change.

 Thursday, April 13, 2017, 11:43: Water package started.

Update schedule to show job process in TH. See attachment 1,2.

Anders and I found a low frequency issue(13hz only) on TCS TGHT flow sensor when doing TM4 conditioning. By trouble shooting, We found the module water lines are good. the restriction cause this problem in on TCS supply or return water lines to TGHT.  I switched TGHT lines with MSP water lines. The wheel frequency on TGHT is 67.0hz which is pretty high. Now, MSP is using the original TGHT water line(flow sensor frequency 13hz). Flow sensors and thermocouples are switched as well so no control system change is needed on epic page. Everything are re-labeled in TH.  With less brazing joints closing to heater source, the MSP line should be ok. By further troubleshooting this issue, I think the problem on this low flow sensor frequency problem is on those 1/2" Parker gray water lines inside that big  6" white pipe.  See attachments. The lines are are twisted, and could be squeezed in my view. Since everything is enclosed in that big pipe, It is hard to tell where the lines are squeezed and cause this restriction. Comparing to an open guide chase, this round pipe makes everything  difficult. Hard to trouble shooting , hard to remove lines or add new lines. It only looks beautiful. I tried all I can do, But, I have no quick solution to solve this problem permanently.  Maybe, Rob walker and his technicians has better skill or more strength on removing old lines, or adding new lines to solve the problem. 

The TCS bias was turn off before that. The TM2 and TCS are still under vacuum now.

TCS IG1S  is switched on as well. The reason to start the pump is to prepare a possible extended TM2 conditioning at TCS caused by TH crane issue. TCS:TP1 and TP2 are not switched on for this.

TCS:MP1 was tripping of intermittently yesterday. It was found by Dave Morris that the current sensor was not set correctly causing the pump on status to flicker at times. Dave adjusted the settings yesterday. The system should be operational and is currently running normally.

During TM3 roughing down yesterday afternoon,The vacuum gauges CG1 and CG1S stopped at 1.20 torr and refused to drop down. Leak detector was used to found where the problem was. LD was in rough detecting mode and showed 2.7xE-6 atm.cc/sec as base leak rate.  Spray medium amount of helium to TM3 service top, and found this leak was on round panel of TM3 side wall. LR climbed to E-4 atm.cc/sec range on helium spraying. In my vie,One 10# socket head screw was not tightened properly after cameras job and caused this.  The TCS was vented. The panel was took off and reinstalled. O-ring on the panel  was replaced by a new one as well. Then TCS was pumped down again. The leak disappeared .  All turbo pumps on TCS and TM3 were started successfully later.

Today TM3 was conditioned up to 50kV. At 50kV sparking started and to go higher in voltage it needs more conditioning time. Lowered it to 49kV for the night.

Sparking was found this morning inside HV cover on TCS in TH while TM3 was HV conditioning at TCS. The TCS bias was set to 50KV when I found this spark. It sparks between HV cover front side wall to a KF 25 clamp on HS water terminal. The KF 25clamp is used in this situation on HS water line top because the HS line is opened inside module, and we need a vacuum seal on the top of this line.  Actually, The clap is much smaller than the corona ring on HS terminal, and the corona ring is more close to side wall. But there is a 90 degree straight corner on this clam. So the spark happened between the side wall and this 90degree corner on the clamp. We can not change the clap now since it will break vacuum. So, we decide to do HV test without HV cover installed onTM3 at TCS. A work permit is issued for  this. Lock out procedure: Document-70039 is clarified in WP.

Today TM3 HV conditioning went up to 65kV. I'll leave it here over night. ISAC OPS have instructions to keep an alarm on the HV, and ion gauge and turbo pump (TP2 tripped 3 times due to sparking).