 Monday, May 01, 2017, 13:11, David Wang, South Hot-Cell, Repair, TM3, , Electrical Check on TM3 after fibergalss is moved in SHC.
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RU( coil 1), F (anode), and 60kv bias(HS, Gasline, and MSP) are shorted together. Other lines are good. They are measured between individual
line each other @500V. The megga showed OL. All of them to ground are OL @500V as well. EL is grounded during check. |
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Thursday, May 04, 2017, 14:06, David Wang, Conditioning Station, Repair, TM3, , A vacuum to air leak on TM3 service cap round side panel was found and fixed..
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During TM3 roughing down yesterday afternoon,The vacuum gauges CG1 and CG1S stopped at 1.20 torr and refused to drop down. Leak detector was used to
found where the problem was. LD was in rough detecting mode and showed 2.7xE-6 atm.cc/sec as base leak rate. Spray medium amount of helium to TM3
service top, and found this leak was on round panel of TM3 side wall. LR climbed to E-4 atm.cc/sec range on helium spraying. In my vie,One 10# socket head |
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Friday, May 05, 2017, 11:06, David Wang, Crane, Standard Operation, TM3, , TH crane is used for 5 shielding blocks transferring.
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TH crane is used for transferring five shielding blocks(30000lbs) today. All brakes work fine. Mostly, I do not need crane slow up motion for
this job so during 1 hour moving, no rattle sound and burning smell has been found. I think TH crane is good to use as we decided. |
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Friday, May 05, 2017, 11:53, David Wang, Conditioning Station, Repair, TM3, , sparking on TM3 serice cap top.
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Sparking was found this morning inside HV cover on TCS in TH while TM3 was HV conditioning at TCS. The TCS bias was set to 50KV when I found this spark.
It sparks between HV cover front side wall to a KF 25 clamp on HS water terminal. The KF 25clamp is used in this situation on HS water line top because
the HS line is opened inside module, and we need a vacuum seal on the top of this line. Actually, The clap is much smaller than the corona ring on |
Monday, May 08, 2017, 09:49, David Wang, Conditioning Station, Standard Operation, , , TH schedule 132 update weekly 
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| Update TH schedule weekly to show the job process. |
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Tuesday, May 09, 2017, 07:00, David Wang, Conditioning Station, Repair, TM3, , Follow up Aurelia's entry, TM3 and TCS current limits investigation.
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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 |
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Tuesday, May 09, 2017, 12:45, David Wang, Conditioning Station, Repair, TM3, , TM3 service tray side panel is cleaned and installed back to TM3
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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. |
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Friday, May 12, 2017, 07:42, David Wang, Crane, Repair, , , TH crane burning smell, smoke, and big noise on east side main hoist brake assembly.
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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 |
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Wednesday, May 17, 2017, 08:31, David Wang, South Hot-Cell, Standard Operation, TM4, , Leak check on TM4 HS line at SHC
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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. |
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Wednesday, May 17, 2017, 08:35, David Wang, Conditioning Station, Standard Operation, TM4, , TCS turbo pumps was started yesterday
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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. |
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Thursday, May 18, 2017, 10:08, David Wang, Conditioning Station, Standard Operation, TM4, , TM4 TP1 at TCS
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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. |
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Friday, May 19, 2017, 12:25, David Wang, Conditioning Station, Standard Operation, TM4, , TCS and TM4 water flow measurement.
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Friday, May 19, 2017, 13:49, David Wang, Conditioning Station, Repair, TM4, , TM4 TP1 at TCS
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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. |
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Tuesday, May 23, 2017, 13:30, David Wang, ITE, Standard Operation, TM4, , TM4 has been connected in ITE
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| Yasmine and I connected TM4 in ITE . All turbo pumps are started. |
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Tuesday, May 23, 2017, 14:10, David Wang, ITE, Standard Operation, , , ITE water interlock check is done.
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| We do this check once a year now. Rene found a target oven reset issue during the check . He will consult with Friedhelm. The interlock check is good. |
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Wednesday, May 24, 2017, 08:11, David Wang, ITW, Standard Operation, TM2, , TH schedule 132 update weekly
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| See attachments. |
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Wednesday, June 07, 2017, 13:33, David Wang, Conditioning Station, Standard Operation, TM2, , TM2 SiC#36 leakc check and electrical check.
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| The results are good. See attachment. |
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Wednesday, June 07, 2017, 13:34, David Wang, Conditioning Station, Standard Operation, TM2, , TM2 and TCS vacuum system has been connected.
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| I started all turbo pumps. |
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Thursday, June 08, 2017, 07:37, David Wang, Conditioning Station, Standard Operation, TM2, , Helium pressure test on TM2 water llines at TCS.
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The helium pressure test on HS line is done at TCS
this morning. I got the same result as last time when we helium pressure it it with first target in April. The leak rate on this line is 1.8 XE-7atm.cc/sec.
So, we know this leak is mostly on the line, but not on the VCR joints connecting the target. See attachment for last time(April) checking e-log. |
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Thursday, June 08, 2017, 08:35, David Wang, Conditioning Station, Development, TM2, , TM2 gas line reconfiguration on the module top.
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Reconfigured TM2 gas line on the module top. It matches with the febiad gas line we are using on service tray now. Facing the module, both of them should
be that right side line of two SST lines on feed-through. The gas line on TM2 was leak checked with a blind cap installed on service tray side and LD connected
on module top this Tuesday. It is leak free with helium spray on the top of module and service tray. |
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