Target Hall Scheduled Activities  April 07 - June 26  2015 update.      2015-05-01. All TH scheduled jobs are finished on time this week.

Containment box has been removed in preparation for wire replacement.

TM#2 with no source tray has been moved from the north east silo to the south hot cell.

TM1 has been connected in ITW. Five turbo pumps have  been started. The TM1 containment box window line is capped on the service cap and the line is pump town to E-4 torr range.

TM#1 with UC#12 has been moved from the conditioning station to the west target station.

The new TBHT and TGHT power supplies were brough up to high current; 350 A and 420 A respectively. The TGHT power supply was limited by PLC to 420 A. The resistance calculated for both the TBHT and TGHT copper lines from the electrical services room to the ITW pit was 1.35 mOhm. See attached spreadsheet for details.

Dave Morris has been contacted to correct the current limit for the TGHT supply to 600 A.

Dan and I replaced ITW target pit o-ring seal(.275DIA X42"ID). It is an annual job before first beam to ITW. The old o-ring was moved and the groove was vacuum cleaned. The new o-ring has been installed properly.

Dan and I vented CS and TM1 with Argon gas before it is moved this morning.

The water blocks soldered to the TM2 cooling lines (see Ref. Assy. ITA6144) were inspected.

See attached inspection reports and drawings.

It was found that only 18% of the seal groove diameters and 55% of the depths were in spec.

The source tray must be tested on the test stand with c-seals to ensure that these blocks will seal properly on the module.

On drawing ITA6008 for the Encole 0.5" ceramic standoffs there is a note to match pairs of ceramics to within +/-0.001". This step was missed on the current build of TM2 source tray (ceramics were not measured).

Measured the lengths of the rest of the ceramic standoffs in inventory and they range from 0.5035" to 0.4950" in length. The ceramics have been sorted by length and grouped into bags.

TM1 has been partially disconnected at CS for tomorrow move. The CS TP1S is still running and will be stopped and disconnected tomorrow morning.

Changed by Dave Morris. 

New value is 1E-5 T (old value was 7.09E-5 T)

There is a huge leak on TM1 containment box window. I did a 70 psi helium pressure test on all TM1 water circuits this morning. The LD base leak rate was 0.0XE-9 atm.cc/sec. When applying the 70 psi helium to containment box window circuit, the leak rate on LD jumped to 1XE-4 atm.cc/sec in 5 seconds.I released the helium source right away,t but the conditioning station is full of helium  molecules already, and the leak rate on LD stays at 1xE-5 atm.cc /sec.  The leak on this circuit is huge.    Other water lines are good.        

I did an electrical check on TM1 at CS. The resistance check:A-B 3.918m ohm, A-C 5.905m ohm,A-D 4.070m ohm,B-C5.462m ohm,B-D3.633m ohm. They are very close to the check we did in SHC. The only unusual thing I found during the check is the ohmmeter reading between A and 60 KV common (6.2K )and the Megga reading between them  at 250 V which is 0. I repeated 4 times and always got the same readings. However, after so many times check, the Megga reading between A and 60KV   suddenly went back to normal(300 M at 250V) at the final check.  And,it stays at 300M now.  All other measurements are same as we did at SHC before.         

On Friday April 17th, UC#12 target was installed in TM1.  One of the copper water lines was bent slightly as the target was lifted into the module which caused ~15 minute delay due to difficulty getting the VCR nut threads to engage.  Other than this the install went smoothly.

During replacement of the containment box panel two of the threaded holes were found to be stripped.  One on the top at the center, the other in the bottom right corner.  These two holes were left without fasteners (see attached photo).  It is unknown at this time whether these holes were already stripped, or if they were stripped during this installation.

The MK4 optics tray prepared for TM2 (as per ITA6082) had an undersized bore for the banana plug, making insertion of the plug extremely difficult / impossible.

Reference stores parts were collected to check the fit:  male plug 3-4/01152 and female jack 1-6/1201.  The size of the female jack was checked with a #21 drill at .159".

The bore on the optics tray was drilled out dry using the #21 drill to the same depth as the original blind hole, by Maico and Dan McDonald.  Chips were carefully collected in a rag, and the hole was blown out with compressed air.

The fit was checked to be snug but possible, using the male plug and the Remote Handling ultem base (ref ITA6023).

Redlines and photos are attached.

The TH will be locked during the TM1 conditioning time due to  an interference issue between CS HV cover and a gas analysis valve on top of TM1. A work permit has been issued for the conditioning job because of it.

Monday, April 20, 2015, 09:35: Started cooling water circulation

HV cover did not fit due to interference with the air sampling valve. Target Hall will have to be locked out for conditioning to proceed. WP I2015-04-20-2

Monday, April 20, 2015, 10:09: Started chiller staging

Target hall and HV enclosure has been locked out.

Monday, April 20, 2015, 13:45: 22 kV, 0.04 mA BIAS 

Monday, April 20, 2015, 14:58: No sparks observed. BIAS off

Tuesday, April 21, 2015, 08:26:  Starting heater auto-ramp to 500 / 230 A at 2 A/min

Tuesday, April 21, 2015, 08:32: BIAS/EE to 20 / 1.5 kV

Tuesday, April 21, 2015, 12:59: TGHT / TBHT at 327 / 230 A. Pausing the auto-ramping. Bill will be monitoring TCS while I am off-site.

Tuesday, April 21, 2015, 15:56: Continue auto-ramping

Tuesday, April 21, 2015, 17:34: Auto-ramping finished. TGHT / TBHT at 500 / 230 A

Wednesday, April 22, 2015, 08:43: Vacuum tripped heaters and BIAS over night. Switching off to do a leak check on the service cap.

Wednesday, April 22, 2015, 09:03: Stopping turbo and roughing pump for David. David is preparing a leak check.

Wednesday, April 22, 2015, 09:06: Started roughing pump.

Wednesday, April 22, 2015, 09:22: Roughing pump trips off after a few minutes of pumping.

Wednesday, April 22, 2015, 13:11: Stopped water flow.

Wednesday, April 22, 2015, 16:07: Starting turbos 

Wednesday, April 22, 2015, 16:15: All turbos at speed.

David found a leak on the window line this morning.
https://elog.triumf.ca/TIS/RH-ISAC/896

Thursday, April 23, 2015, 11:12 : Starting cooling pack

Good vacuum limit on IG1 changed from 7E-5 T to 1E-5 T

Thursday, April 23, 2015, 12:53 : Starting heater auto-ramp to 500 / 230 A at 2 A/min. Bad vacuum limit reduced to 8E-6 T

Thursday, April 23, 2015, 13:03 : BIAS/EE to 15/ 1.5 kV

Thursday, April 23, 2015, 13:28 : BIAS/EE to 20/ 1.5 kV. No sparking observed

Thursday, April 23, 2015, 17:23: Auto-ramping finished. TGHT / TBHT at 500 / 230 A

Thursday, April 23, 2015, 17:51: Fault on cooling circuit (Fault 2).. Manually starting CP1

Thursday, April 23, 2015, 18:01: Cycled power of chiller unit. System recovered. Enabled staging.

Thursday, April 23, 2015, 18:42 : One minor spark observed. Starting cool down at 12 and 9 A/min

Thursday, April 23, 2015, 19:51 : Heaters and BIAS off

Friday, April 24, 2015, 08:21 : Water cooling off

Weekly target hall schedule update.2015-04-20

weekly target hall schedule update 2015-04-27 attachments 3,4.

TM#1 with UCx#12 has been moved from the south hot cell to the conditioning station.