The blocks have been removed from the west target station. The fields at the top of the target pit at the railing at waist level is about 80uSv/hr, Turbo pumps are about 805uSv/hr, backing lines for the turbos about a 1mSv/hr and the average field in the area of work down in the pit is about 600 to 750uSv/hr. The proton beam went off at 10:45 on December 2nd, these measurements were done at 09:00 on December 3rd.

Another set of field measurement was done at the west target station. At the top of the west target station at the railing the field ranged from 50 to 70 uSv/hr. The turbo pumps had field of about 650uSv/hr, the area over the dump was about 750uSv/hr, the area over the HV cover and the south side was about 450uSv/hr. These measurements were done at 13:15 on December 3rd.

 It was attempted to HV condition TM2 to 55kV and leave it operating there for an hour to demonstrate stability. Unfortunately at 52.65kV a spark destroyed the canbus controller. This controller had shown issues in the past but seemed to magically fixed itself. I will contact Hubert for another card. Attached  is is a screen shot of the stip tools. 

I installed 8 new bolts(3/8-16 UNC x1.25  STL) on the ITE TP3. The ITE TP3 replacement job is done. Everything is connected back to the pump. and it is ready for starting.

Chad and I leak checked TM4 heat shied water circuit at SHC. The pumping down was very good.Base leak rate 0.0xe-9 atm.cc/sec. BP 0.0xe-4torr. Sprayed helum twice on both VCR fittings.There is no response on leak detector.  The circuit is leak tight.

I connected TM4 in ITE. All turbo pumps have been started and wok fine including new TP3. Everything is good so far.

Today 55kV was applied to TM2 and held for over 1 hour with the EINZEL at 27.5kV. There were 2 sparks and the current was unstable at this voltage but this test should be considered a success. Once again while bringing the voltage up the canbus continued to be a problem. After successfully passing the test I continued to raise the BIAS and EINZEL. A spark at 57kV tripped a controller for the vacuum and the canbus. As stated before I believe the module will reach 60kV and that there is an interaction between the EINZEL and the BIAS. I am not certain if that interaction is internal or external to the module. Attached is a screen shot and the dumped data.

I moved 5 shielding blocks to ITE. The ITE is configured to take proton beam.

While under vacuum Travis and I completed diagnostics of the HV chase. Majority of the lines showed OL at 1kV but there were the following "failures"

A to P @ 250V 716kOhm
A to Q @ 1kV 25.18MOhm
B to C with ohm meter 8Mohm @250V 830kOhm
B to D @ 1kV 15.57MOhm
C to D @1kV 16.18 MOhm
P to Q @1kV 1.069 GOhm
G to J with ohm meter dead short.

Ideally all of these values would be OL and they may improve or get worse when the source tray is installed depending on where the electrical contact is. I need to discuss with Friedhelm but I believe that as these values the module can still operate. Without changing the HV chase there is very little chance of improving these values.

I have managed to reduce the field at the broken manipulator from 12 mSv/h to 400 uSv/h.

The repair/cable replacement on the east manipulator is now complete.

Yesterday's initail cable replacement went very well however, due to a minor glich, we were unable to test the tong movement until I was out of the hot cell. Tong did not fully close and felt like there was a "hard stop" at a repeatable spot in the  closing of the tong. Upon further investagation, I determined that the problem was definelty on the slave side.

I conducted a troublshooting exercise this morning to narrow down the problem. I quickly found that the new tong came from the manufacture with two incorrect fasteners (socket head cap screws) instead of set screws. As a result the tong was being kept from closing as the head of the socket head cap screws was interfering.

I replaced the SHCS was the set screws from the old tong. The tong now functions with full range of motion.

Jan. 15, 37 minutes in cell .26 mSv

Jan. 16, 16 minutes in cell (as I did some clean up of compressable waste) .05 mSv

Also, the inital repair utilized a prototype tool I designed (and with assistance from Maico, built). This tool made the repair much easier. I will be making small improvements to the design and issuing drawings to the vault and shop.

5 SHIELDING BLOCKS HAD BEEN MOVED OUT OF ITE.AIR SAMPLE AND SWIPED FIRST BLOCK AND ITE PIT.NOTHING HAD BEEN FOUND ON ALPHA MONITOR AND OTHER TWO MONITORS.

I DISCONNECTED TM4 IN ITE. ALL WATER LINES HAD BEEN PURGED OUT WITH PRESSURE AIR.

Travis and I removed 4 shielding blocks located on top of pre-seperator  in TH. This is a job for ITE harp 9 re-installation after it  is repaired . The blocks move are successful.

Targets NiO#1(101), Nb#5(85), TaC#1(92), and ZrC#5(81) have been moved from the storage vault and placed in the mini storage. The F-308 flasks have also been moved in to the target hall as well. The attached are the current statuses of both vaults.

Chad and I leak checked TM2 tube heater(+) water line yesterday afternoon. The water line was difficult to pump down on base leak rate, but LD  base pressure was fine . The base pressure on leak detector was pumped to 0.0XE-4 torr quickly. The base leak rate only could be pumped  to  4.5 xE-8 atm.cc/sec after 1 hour waiting time. All vacuum connections to leak detector  in the target hall were leak checked and they were good. Chad checked helium flow in SHC. He sprayed helium twice on tube heater(+) water block soldering joints. I did not see any response on leak detector in TH.The base Leak rate and base pressure did not move up during the test.  See attachment pictures.

Chad and I did a pressure test on TM2 tube Heater+(D) water line.I pressurized the D line with shop air from quick connectors(both ends) on service cap.chad applied bubble soap onto the D water block in SHC. The test started from 5psi,and increased 5psi each time to 40 psi. From 5 to 35 psi, no bubble has been found on water block. At 40 psi , bubble appeared from blind blank off seal , but not from soldering joints. Since the o-ring seal for the blank off is  vacuum seal , but not for pressurizing, It is understandable the seal could not hold 40 psi pressure air. No bubble had been found on the D water block soldering joints .See attachment pictures.

Bevan and I did a leak check on TM2 tube heater+ from inside service cap in TH. The leak detector base leak rate 0.0xE-9 atm.cc/sec, base  pressure 0.0xE-4totrr. One of side panel on service cap was opened. Bevan sprayed the helium to the "D" line inside the blue insulator.The helium flow was checked , and he sprayed twice. No response has been found on leak detector.  See attachment pictures

All targets in the mini storage (4) have been moved from there and placed into the F-308s and those have been moved to the mech services room.

Containment box has been removed and the blank off from circuit D has been removed for inspection of both the blank off and water block sealing surface.

New cleaning and polishing pads have been inserted onto the hot cell as well as rubber bungs and a new blank off.

The inital waterblock cleaning with the "scotch bright" pads has been completed. See attached pictures...the first picture being before and the second after.

Tommorow the water block will have bungs put in and a leak check to check the block will take place. After that, the new blank off will be installed and tested.