Electrical check of the TiC#4 on TM#3 post beam at the south hot cell, see attached PDF for details

When the Containment Box was opened today by Chad for a target change, we found the conductor insulator block B (ITD0054) to be broken close to the right TGHT terminal. Chad was nevertheless able to remove the target. See DocuShare and attached file for photos.

An attempt to replace the insulator will be made tomorrow with a spare.

A small sticky piece, likely off plastic material, was found next to the left main source tray insulator. The piece was removed from the Containment Box. See link above and attachment for photos.

See attached pdf and DocuShare for more photos. It may be possible to clean some of it from the Ground Electrode.

Anders Mjos wrote:

When the Containment Box was opened today by Chad for a target change, we found the conductor insulator block B (ITD0054) to be broken close to the right TGHT terminal. Chad was nevertheless able to remove the target. See DocuShare and attached file for photos. An attempt to replace the insulator will be made tomorrow with a spare. A small sticky piece, likely off plastic material, was found next to the left main source tray insulator. The piece was removed from the Containment Box. See link above and attachment for photos.

 The two insulators ITD0053 and ITD0054 was replaced this morning by Chad. Photos on DocuShare. All bolts torqued with torque wrench see attached PDF for values.

 See attached PDF. The object is not accessible with only the front panel removed. Photos on DocuShare.

Electrical check of TM#3 after the insulator repair. See attached PDF for details.

Chad and I leak checked the TM3 HS water line with new target installed.  No leak has been found during the check. Leak detector base LR 0.0xE-9 atm.cc/sec, base pressure 0.0xE-4 torr. The line will be helium pressurized at CS later.

Electrical check of the TM#3 with SiC#30 attached. Also an electrical check of TM#3 after the cleaning of ground electrode with no target attached.

Anders Mjos wrote:

See attached pdf and DocuShare for more photos. It may be possible to clean some of it from the Ground Electrode.

 Chad cleaned the GND electrode yesterday June 26th - see attached PDF. Photos on DocuShare.

TM#1 with UC#9 has been moved from the west target station to the south hot cell.

Electrical check of the TM#1 with UC#9 post beam at the south hot cell.

The UCx#9 target has been revomed from the target module...leg A was broken as suspected.

Ta#42 has been installed. High current connection fasteners torqued to 150 in lbs.

Just some notes on the install of SiC#30 on TM3 last month...It was installed with all new fasteners and torque values provided by Anders were used...of main interest is probably the main high current fasteners which were torqued to 150 in lbs.

TM#1 with Ta#43 electrical check see attached PDF.

TM#1 with Ta#43 has been moved from the south hot cell to conditioning station.

TM#2 has been moved to the hot cell from the north east silo.

Target Ionizer tube cooling lines "C" and "D" in Target Module 2 were both leak checked at the Hot Cell.  The lines were both blanked-off.

Bill Paley was present with David Wang in the Target Hall, operating the leak detector.  Grant Minor and Anders Mjos were present with Chad Fisher at the Hot Cell.

The "D" circuit was already blanked off with a copper blank containing silver brazed stainless steel inserts and indium plated inconel c-seals.

The "C" circuit was already blanked off with an aluminum blank and rubber o-rings.

The cooling lines are indicated in the attached screencapture from ITA6021 Rev .14, and are also labelled in the attached photo.

The "D" circuit was checked first, starting at around 12pm.

1.  The helium flow was tested by blowing dust on the work table.

2. The base leak rate on the Varian leak detector was confirmed in the "D" circuit to be stable at 10^-9 atm cc / sec and the pressure was 10^-4 Torr.

3. Each soldered joint on the "D" circuit was sprayed with a 2-second blast of helium - no response at the Varian.

4. The joint between the module-half of the water block and the copper blank-off was sprayed with a 2-second burst - no response.

5. A general area flood of helium sprayed for 10 seconds was applied all around both the "D" and "C" blocks - no response.

It was concluded that the "D" circuit had passed this leak check.  The "C" circuit was checked next.  The detector was changed to the "C" circuit and the circuit was pumped down.  At around 2pm the leak check resumed.

6. The base leak rate on the Varian leak detector was confirmed in the "C" circuit to be stable at 10^-9 atm cc / sec and the pressure was 10^-4 Torr.

7. The solder joint area on the "C" circuit was sprayed with an 8-second burst of helium - no response.

8. The joint between the two halves of the water blocks was sprayed with a 6-second helium burst - no response.

It was concluded that the "C" circuit had passed this leak check.

The electrical continuity of the "C" and "D" circuits were confirmed in the Target Hall at the service cap, and in the module at the Hot Cell, to double check that the correct lines has been pumped and leak checked - this was OK.

The ionizer tube heater lines appear to be leak tight at the Hot Cell.

SiC#30 has been removed from TM3. A quick exam of TM3 source tray did not  yield any obvious signs of damage.

9 pin connector on the target showed the usual sparking/arcing marks.

Heat shield has been removed from the target. Inside of heat shield has some unusual marks on it and quite a lot of black deposits.

TM#3 with no target has been moved to the northwest silo for storage.

SiC#30 in pail #117 has been move to the spent target vault and placed in spot 2C. See attached PDF for details.