 Wednesday, July 08, 2015, 14:05, David Wang, South Hot-Cell, Repair, TM2, , leak check coil line(R,U) on TM2 at SHC
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Chad and I leak checked coil line(R,U) on TM2 at SHC yesterday. The leak detector was pumped down to 0.0Xe-9 atm.cc/sec before the check. Chad sprayed
helium on the soldering joints connecting the cooling copper lines to the small holding blocks for the coil terminal(R,U). After sprayed helium 2
seconds, I saw the leak rate on LD started to climbed up. The highest leak rate is 4.0xE-8 atm.cc/sec. It is a very positive response. We waited the leak |
Wednesday, July 15, 2015, 11:18, David Wang, South Hot-Cell, Repair, TM2, , leak check coil line(R,U) on TM2 at SHC 
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Chad and I leak checked the coil 1 circuit(R,U) after rebuilt coil line is installed on TM2 source tray. The pumping down on the circuit is very quick
and smooth. The LD base lake rate 0.0xE-9 atm.cc/sec. Base pressure0.0xE-4 torr.
Chad sprayed lots helium on the R( coil 1+)and U(coil 1 -) water blocks. During 1 minute waiting time, there is no any response on LD. The |
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Wednesday, February 28, 2018, 14:47, David Wang, ITE, Standard Operation, , , leak check ITE primary and secondary vacuum vessel.
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2018-02-27: Anders and I finished leak check on ITE primary and second vacuum vessel seals. LD connected to ITE BV2 valves between. LD, Base Leak rate
1.2 xE-9atm.cc/sec, base pressure 0.0XE-4torr. There is a leak has been found on TM4 service cap KF25 blank off. The o-ring on the blank off will be changed
later. It is an easy fix . Other seals are good. The big T tank seal on secondary vessel is leak checked as well. It is still fine. Helium pressure |
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Tuesday, June 04, 2024, 11:44, Carla Babcock, South Hot-Cell, Development, , empty LP FEBIAD, investigation of cathode short on empty LP FEBIAD
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On May 30 Aaron, Chad and I removed the empty LP FEBIAD target from the SHC into the anteroom to attempt to find out the source of the cathode short
observed online. The behaviour online was that a connection of several hundred ohms was preventing the cathode from being biased. The resistance was still
enough to allow us to run in anode mode, which is what we did. I am not sure where the cathode short came from but there was significant sparking on this |
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Thursday, January 30, 2025, 07:13, David Wang, Crane, Standard Operation, , , inspection of target module lifting frames ITA0494-1997-01 and ITA1994-1997-02
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Tom Gauss inspected two target module lifting frames ITA0494-1997-01 and ITA0494-1997-02 yesterday. He certified the use of these two frames
for 2025. Inspection tags have been issued and attached to frames. He has inspection record on them.
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Thursday, January 30, 2025, 07:17, David Wang, Crane, Standard Operation, , , inspection of target hall crane below hook attachment pins and plates ITA6550-01.
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Tom Kauss inspected target hall crane below hook attachment pins and plates ITA6550-01 yesterday. He certified the use of these pins and plates
for year 2025. The inspection of these pins and plates was in Target hall crane annual check list. It was issued as a calibration index by Isaac
Earle in 2022-Feb-08. After inspection, The inspection tag was issued. Tom has an inspection record on this job. |
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Sunday, October 06, 2013, 00:17, Friedhelm Ames, Conditioning Station, Standard Operation, TM3, NiO#2, high voltage conditioning
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high voltage conditioning was carried out over the day up to 24 kV. i will leave it at 20 kV over night. Current is at 22 micro Amps, heaters off.
vacuum: IG1 7.7e-7
IG2 4.07 e-6 |
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Friday, February 16, 2024, 11:48, David Wang, Cooling, Maintenance, , , high active water transferr to holding tank
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100 liters of high active water from HALCW system( mostly from s-tank and pipe lines closing to pumps) are transferred to holding tank in 2A tunnel.
Transfer is smooth. it is a preparation job for ITC:MP1/MP2 refurbishment. water sample is passed to RPG for assay. |
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Thursday, April 04, 2024, 13:10, David Wang, Cooling, Maintenance, , , high active water refurbishment, reinstallation, and test operation.
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both high active pumps ITC:MP1 and MP2 are refurbished by RH group Maico and Peter. Pumps have been installed back to system with new inlet/outlet flange
gaskets. high active water surging tank is refilled with water and pumps were primed. I asked operator to switch on pumps separately. Both pumps work fine.
They are quiet and pumps discharging pressure is a little bit better comparing to before refurbishment. Nitrogen gas is injecting into system. O2 level |
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Wednesday, February 16, 2022, 15:19, Frank Song, Cooling, Repair, , , high active cooling water valves repaired/replaced
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A 3/8 inch drain valve on return cooling line was replaced in ITE. In the meantime two 1/2 inch valves labeled FEBIAD COIL and ENTRANCE COLLIMATOR
RETURN at ITW were replaced . The 2 inches leaky supply/return water valves in ITW were repaired as well. Pls check pics
attached here for detail. |
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Thursday, April 11, 2013, 07:18, David Wang, Conditioning Station, Maintenance, TM1, Ta#29, helium pressure tested all water lines in TM1 at CS
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| On April 08th, all water lines in TM1 had been helium pressure tested(70psi) at conditioning station. No leak had been found. |
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Tuesday, May 22, 2012, 10:00, David Wang, Conditioning Station, Standard Operation, TM4, sic 27, helium pressure test on heat shield circuit
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I did a helium pressure test on heat shield circuit. The leak detector is concected to the TM4 primary vacuum system.The IG1 is 1.1xe-6 torr,PNG4 is
1.5 x E-6torr,and IG4 is 2.1 XE-6torr.leak detector base leak rate:0.0xE-9 atm.cc/sec, base pressure is 0.0x E-4 torr.Applied 80psi helium to heat shield
circuit for 4 mins .There is no any response on leak detector during 4mins time. There is no pressure change during the test time. The heat shield circuit |
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Thursday, January 06, 2022, 13:54, David Wang, ITE, Standard Operation, TM4, , helium pressure test on TM4 internal cooloing lsine at ITE.
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Helium pressure 70 psi. 3 minutes on each circle untill LR on LD is balanced. Base leak rate on LD:0.0xE-9 atm.cc/sec. The result:
A: slowly to1.8Xe-8atm.cc/sec after 2 minutes and balanced there.
B: slowly to 2.0XE-8 atm.cc/sec after 2 minutes and balanced there. |
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Friday, August 08, 2014, 08:47, David Wang, Conditioning Station, Standard Operation, TM4, UCx #10, helium pressure test on TM4 HS water line at CS.
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| Helium pressure test on TM4 HS water line at CS is finished. 80psi helium no leak. |
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Thursday, June 23, 2022, 13:04, David Wang, Conditioning Station, Standard Operation, TM4, Ta#64, helium pressure test on TM4 HS line.
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With Ta#64 installed , TM4 HS line was helium pressure tested at TCS. base leak rate is 0.0XE-9 atm.cc/sec. HS line tested leak rate is 3x E-7 atm.cc/sec
on 5 minutes 50 psi helium testing. Leak check result wasgood at NHC by helium spray method. We decided to apply water to HS and all other water lines
still. The vacuum status is closely being watched. So far, TCS pumping down trend is still good. HS line supply water valve was switched on and off couple |
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Thursday, November 25, 2021, 10:33, David Wang, Conditioning Station, Standard Operation, TM4, Ta#63. , helium pressure test on TM4 HS line at TCS.
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Helium pressure test on TM4 HS line at TCS is done. LD base leak rate 0.0 xE-9 atm.cc/sec. Helium pressure 70psi. HS line had been helium pressurized
for 5 minutes during the test. No response on LD. HS line with Ta#63 is leak free. |
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Monday, July 28, 2014, 14:37, David Wang, Conditioning Station, Development, TM2, , helium pressure test on TM2 tube heater +(D)and -(C)water lines. 7x
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TM2 installed in Conditioning Station
Varian Leak detector connected directly to Target Module 2 Service cap.
Vacuum draw in Target Station with both module turbo pumps
Leak detector baseline normal (10^-4 Torr, 10^-9 Std cc/s He)
Since no Source tray is installed, and tube heater supply conductor is blanked off in target enclosure, it was necessary to test both |
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Monday, February 17, 2014, 09:32, David Wang, Conditioning Station, Repair, TM2, , helium pressure test on TM2 tube heater +(D) water line. 6x
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I did the helium pressure test on Tube heater+ line this morning. The vacuum on CS and TM2 are very good. The base lake rate on leak detector was 1.7xE-7
atm.cc/sec. Base pressure was 0.0xE-4torr. I applied helium to the "D"line .The test started from 30psi up to 80psi on both side "D"
line.The base leak rate slightly changed to 1.9xE-7 atm.cc/sec during the test,but not base pressure. At this base leak rate level, No obvious leak had |
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Friday, December 05, 2014, 11:58, David Wang, Conditioning Station, Development, TM2, , helium pressure test on TM2 tube heater +(D) water lines. 6x
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At CS, The leak detector is hooked directly to the TM2 top service cap. The base LR 0.0xE-9 atm.cc/sec, base pressure 0.0xE-4torr. Applied 80 psi helium
to TM2 tube heater +(D) line . During 3 minutes applying time , I did not see any tiny change on LD readings. The line is perfectly vacuum sealed.
See attachment pictures. |
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Monday, July 21, 2014, 13:11, David Wang, Conditioning Station, Standard Operation, TM1, , helium pressure test on TM1 HS water line at CS.
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| The TM1 HS line is pressure tested this morning with 70 psi helium at CS. No response has been found on leak detector. |
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