On August 22nd TM1 was vented with Argon in the conditioning station. It had been pumping with just the roughing pump over the weekend so the UCx#2 target would not be exposed to oxygen. The move went without incident and took roughly an hour to complete. Once at the hot cell the panel was removed by Tom Lyth and a leak check completed with Bevan, David Wong, Grant Minor, and Tom Lyth present. The connections to source tray were checked starting at the top. Each connection was checked on either side of the VCR and at the center through the hole in the nut. For both connections on the source tray there was no response from the leak cart which was at a pressure of 0.0 x 10^-4 T and had a baseline leak rate of 0.0 x 10^-9 atm cc / sec. The leak check then proceeded to VCR connections on the Target. A leak was found on the upper VCR connection of the target and was repeatable. This leak was detected at the hole of the VCR nut connection by priming the line with helium and placing it next to the hole in the VCR connection. Response time was between 5 and 10 seconds to a maximum of 2.6 x 10^-8 atm cc / sec. The lower connection also appeared to have a small leak rate of 4.4 x 10^-9 atm cc/ sec but could be a result of helium drift. Unfortunately the target is not design to be repaired with manipulators and required the target to be removed from the south hot cell and repaired in the anteroom. The anteroom was prepared for the target by lining much of it with plastic so to prevent the spread of contamination. Once the target was in the anteroom it was leak checked again, the base pressure was 0.0 x 10^-4 and the base leak rate was 0.0 x 10^-9. A response from the upper connection again was detected in the 10^-8 range but no leak was found in the lower connection. It was attempted to tighten the joint to stop the leak but this caused it to increase to the 10^-7 range. This increase in leak rate is as expected from past experience because copper gaskets are used rather than silver plated ones. The heat shield cover was loosened and the gaskets from from both joints were replaced with the silver plated ones. The target was then leak check and passed with no response once again with a full pump down. The target was had an electrical checked with the megger and was within spec. The target was then placed in an argon bag and returned to the hot cell. The bag was damaged went placing it in the hot cell and there were not any acceptable options for leaving the target over night. The target was removed and and placed in 2 bags filled with argon for over night.

On August 23rd the target was removed from the argon bags that were still inflated and returned to the hot cell. The target was re-installed on the target module by Grant Minor, Tom Lyth, an Bevan Moss. One VCR gasket fell off during the first attempt and it appeared that the right target leg may have been slightly bent at some point. Other than that the installation went smoothly but slowly. The heat shield line was then leak checked once again by Grant, Tom, David, and Bevan and no response was detected from the source tray or target VCR connections, the base leak rate and pressure once again achieved the minimum detectable levels. The target module passed the electrical check with the megger, this test was completed by Bevan and Pierre Bricault. The module was then moved from the south hot cell to the conditioning station. Roughing was started at 3:00 and the turbo pumps were turned on at 3:45. The module was left to pump over night.     

Today a leak check on TM1's external seals and the heat shield line was completed by David Wang. After 16 hours of the turbo pumps running on the conditioning station stations pressures were 3.6 x 10^-6 T, 1.2 x 10^-5 T, and 1.8 x 10^-6 T for the containment box, secondary vacuum, and service cap respectively. This is a significantly quicker pump down after the cross with small turbo pump was installed on the vacuum vessel. The base pressure of the leak testing cart was 0.0 x 10^-4 T and the leak rate was 1.2 x 10 x 10^-8 atm cc / sec. There was no response from the external test where the module was sprayed with helium. The heat shield line was pressurized with 80 psi helium which caused the leak rate to climb to a maximum of 2.5 10 ^-8 atm cc / sec but dropped to 1.9 x 10^-8 atm cc / sec and was stable there, the total test time was 2 minutes. This test was repeated another time and had similar results.  These results although showing a slight increase in the detected leak rate are withing acceptable and indicate that the module is leak tight. 

At 9:30 the HV check and conditioning started (~17 hours turbos on), the secondary vacuum, containment box and service cap had the following pressures in Torr respectively, 1.0 x 10^-5, 3.2 x 10^-6, 1.6 x 10^-6.  The voltage was steadily raised with virtually no current up to 28.5 kV which was achieved at 9:50. When raised to 30 kV the current increased significantly to ~300 uA and a large amount of sparking occurred. The voltage was dropped to 0 volts for 2 minutes and then was returned to 30 kV at 10:03, the current draw was around 200 uA and climbing. After a few sparks and time the current had dropped to 120 uA. This indicates that the module is still conditioning and matches what is observed by the control room when the module is in ITW. The module was deemed acceptable for this current run and was then vented with argon this took about 2 hours.

The module was then remotely moved from the conditioning station to ITW. When first attempting to transfer the controls to the remote control room they were not transferred and when testing the up command as per standard procedure the module dropped down slightly. David Wang went to lock out the target again and the controls were successfully transferred. A note of this was made in the log book. Apart from this the move went smoothly.  

West target station is setup to use argon for tank venting.  There is 1200 PSI remaining on argon bottle in electrical room.  That is sufficent for venting west target station to atmosphere twice.  ISAC Operations has been previousily contacted and their procedures for venting remain the same except that they can not rely on ITW:CG4S to determine when at atmospheric pressure.  I have asked them to contact me if an unscheduled vent is required.

TM#1 with UCx#2 has been moved from the west station to the south hot cell. Move went well.

UCx#2 has been removed from Tm1 and put in a bucket with a slow argon feed and a lid placed lossely on top.

TaC#1 ITW has been installed and is awaiting testing at the cell.

TM#1 with TaC#1 installed passed the electrical test. With a value of 882MOhms that was meggered from the heat shield to the chassis, all other measurements are within spec.

Move of TM#1 with the TaC#1 target has been moved from the south hot cell to the west target station.

TM#1 with TaC#1 from the west target station to the south hot cell. Move went well.

TM#1 has been moved from the south hot cell to the conditioning station. Move went well.

November 15, 2011 removed TaC#1 from TM1 and inspected TM1 for any obivous signs of trouble (Problems with EE at end of run).

Upon starting removal of the high current conductor fastener on A+ (Left oven leg) it became clear right away that the oven of the target was broken as the leg moved as soon as the fasten was loosened.

Inspection of TM1 with the target removed yeilded no obvious signs of trouble, save a piece of capton tape found on the sliding tray directly below the service tray.

Inspection of TaC#1 showed that the oven was indeed broken on the A+ (left oven leg) side of the central block.

See the following for pictures.

https://documents.triumf.ca/docushare/dsweb/View/Collection-7438

TM#1 moved from the conditioning station to the south hot cell. Move went well.

Electrical checks of TM#1 with UCx#3 have been completed. They all appear to be with in operational range. All megger checks were done at 500 volts. See attached file for details.

UCx#3 has been installed on TM1.

Leak check also complete.

Base Leak Rate 0.0 x 10-9

Pressure 0.0x10-4

Two checks on upper heat shield joint - no response (2 sec spray/check)

Two checks on lower heat shield joint - no response(2 sec spray /check)

10 sec flood of all heat shield joints - no response

Electrical check coomplete.

TM#1 with UCx#3 has been moved from the south hot cell to the conditioning station. Move went well.

 TM1 was high voltage tested without a target on November 16, 2011 with Don Jackson, Pierre Bricault, and Bevan Moss. The module was able to hold up to 25 kV but between that and 32 kV there was lots of discharge which could be measured in the vacuum. See the attached plot for the voltage current and sparks.

TM1 full leak check in conditioning station has been fulfilled this morning.Both air to vacuum leak check and waterlines helium 80psi pressure test are fine.The result:

Air to vacuum helium spray:base leak rate on leak detector 1.6x E-9 atm .cc/sec.base pressure0.0xE-4 torr. sprayed helium around all flanges, turbo pumps,panels,bellow,insulation stands, gauges. No Response on leak detector. Air to vacuum seals on TM1 is leak tight.

Helium pressure test on all water lines.with 80 psi helium 3minutes test:

        PNG1 :2.4XE-7torr .PNG4 :2.6x E-6torr . IG1 :5.1xE-7torr.

A :target oven(+)  BL:2.0xE-9 atm.cc/sec .First minute no response,then climbed to1.9xE-8 atm.cc/sec. Stabled at 1.9xE-8 atm.cc/sec to 3 minutes.

B:target oven(-)    BL:5.5x E-9 atm.cc/sec.First 80 seconds no response, then climbed to 1.8xE-8atm.cc/sec. Stabled at 1.8xE-8atm.cc/sec to 3 minutes.

C:tube heater(-)   BL:8.0xE-9 atm.cc/sec .First minute no response ,then climbed to 2.7xE-8 atm.cc/sec. Stabled at 2.7x E-8 atm.cc /sec to 3 minutes.

D: tube heater(+) BL: 1.0xE-8 atm.cc/sec. First minute no response , then climbed to 1.8xE-8 atm.cc/sec. Stabled at 1.8x E-8 atm.cc/sec to 3minutes.

G:EE  BL:1.0xE-8 atm.cc/sec .First 1.5 minutes no response , then climbed to 1.7x E-8 atm.cc/sec. Stabled at 1.7x E-8atm.cc/sec to 3minutes.

F:heat shield   BL:1.2x E-8 atm.cc/sec. First  1.5 minutes no response , then climbed to 1.9 xE-8 atm.cc/sec. Stabled at 1.9 xE-8 atm.cc/sec to 4 minutes. Total test time 4 minutes.

I: mounting plate    BL:1.2 x E-8 atm.cc/sec.     NO RESPONSE on leak detector  in 3minutes.

M: window   BL:1.2x E-8 atm.cc/sec First 1.5 minutes  no response,then climbed to 2.0xE-8 atm.cc/sec . Stabled at 2.0xE-8 atm.cc/sec to 3minutes.

The base pressure on leak detector stayed at 0.0x E-9 torr through all the test, and no pressure response on high vacuum gauges.

 High Voltage (HV) testing was completed on TM1 today. Vacuum was very good 1.9 x 10^-7 T in the service cap, 3.2 x 10^-7 in the containment box, and 2.0 x 10^-6 in the secondary. The voltage was successfully brought up to 27kV with a current draw of 0.12mA and o sparking. At the next step, 30 kV, the current draw was above 0.3mA and sparking was beyond 20 sparks per minute. The module should not be taken above 27kV. There is the possibility this voltage can be increased with conditioning but it is very unlikely. See attached for a graph of the testing. These results are comparable to the results without the source tray (see previous elog)

TM#1 with UCx#3 moved from conditioning station to west target station. Move went well.

TM#1 with UCx#3 moved from the conditioning station to the west target station.