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.     

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

The spent UC#19 target has been moved from the south hot cell into the spent target storage. It was placed in pail #145 and put in tray one spot C. See attached PDF for all vault details.

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.   

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.

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.

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

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

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#19 has been moved from ITE to the south hot cell.

This morning, when I prepare for today's crane check, The crane made a very strong noise without any load during the full speed up motion. I stopped the crane right away, and noticed that east side of main hoist motor area was smoking . The crane was moved to east end. And, I climbed up to the top, and found the smoke is coming form brake side, and should be produced by braking. The smell is same as before.Unless other thing is wrong,  I think Gordon crane technician has to adjust the gap to a proper distance on both side of the main hoist. I feel very uncomfortable by operating the crane this way. They have to figure out what is wrong on these new brake assembly installation.

2017-05-12. This morning , Crane technicians increased both side of main hoist brake gaps today. They found on east side brake assembly, The gap is automatically closed after some  jogging motions. Peter think this is caused by torque produced by automatic adjustment springs on brake. This torque rotate  the gap adjustment device and closed the gap.  We operate the crane for a while with 20000lbs load on it after gap adjustment. The rattling sound is still there at slow up motion.  But, The main hoist braking sound is softer and gentle comparing to past month.This sound is more close to the sound before we replaced the brake assembly. So, This adjustment could be right in my view.  They checked  gaps after 0.5 hours operation. Everything is still fixed there . No change. They suggest we keep operating the main hoist, and they will be back on next Monday check again.  I operated the main hoist up and down in different speed motion for 1 hour after they left. Everything works fine. Braking are gentle. No strange sound and smoke during up or down. I will do  more operation on Monday morning before they come. Lets see the result after their checking.  

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2017-05-15.  Gordon crane technician Peter came in during lunch time. Both side main hoist brake gaps have been checked. They are still at the same position as last Friday. The gap is not changed after operation. Peter will be back on next Monday and check everything again.  

 The gap between the north face of the NHC roof block and the target hall north wall in the area where the NHC inlet ducting will be installed has been sealed with Sikaflex 1a flexible polyurethane sealant applied over foam backer-rod.

Chad and Anders inspected the test target in the hot cell today. The lid had been previously removed.

• The EE looked to have performed well. 
• A piece of Ta foil was found inside the heat shield. It is not clear if this has been there during operation or if it entered the heat shield while in the hot cell. The foil has markings which indicate that it has seen heat.
• Travis measured 40 MOhm at 500V between heat shield and anode after the target was removed.

Photos are available on DocuShare

 Neil Wong will fix this leak tomorrow Friday.  See attached schematics for location.

TM3 service tray side panel is cleaned and installed back to TM3 this morning. I visually inspected service tray insulators. Nothing is changed comparing to inspection before.Nine screws are installed on  panel to hold it onto TM3.

Aurelia and I investigated this current limit issue May 8th. First, By separating TM3 from TCS. we found the problem is on TCS side. We did a Megga test on TM3 as well. TM3 is good at 1KV megga test. After that, The insulators between TCS to ground is test. they are good which could hold 1G ohm at 1000V megga test. So the problem should be on power supply side  including power supply itself ,cables and transformer. Later, Tom and John found the TCS bias HV cable from power supply to HV chase top in faraday cage is broken down. It can not hold 5KV on HV test now. This cable should hold 100KV. But not this time. Tom also found  the adapter on Faraday cage could be designed in a better way. The broken cable was removed yesterday. John and Tom will order an exactly same cable from Glassmen.

 Mini Vault Door as some difficulty over coming a small hump on its track. To open the door one needs to give the door  a slight tug while it is opening to over come this hump.

Update TH schedule weekly to show the job process.

Today the voltage was raised from 65kV to 65.7kV. After about 10min at this level TM3 started current limiting. TM3 was not sparking when this happened.

ISAC OPS turned it OFF and then tried to ramp it back ON, but could not do it due to the current limiting.

I turned OFF/ON the PS (locally) 20ming ago and and then tried to get it back from the Control Room, but around 4-5kV it started current limiting.

Turned everything OFF on EPICS for the time being. We'll investigate on Monday.

Over the night the sparking rate at 65kV was from 6 to 2 sparks per hour. It tripped OFF once over the night: backing valves closed, tripping the turbos, tripping IG1 and turning OFF the BIAS. At that time ISAC OPS got it back smoothly.