Argon vent and disconnect TM4 at TCS.

The spent Ta#52 target has been moved from the south hot cell to the spent target vault. See attached PDF for details.

TM4 has been connected at TCS. TCS water system has been started for TM4. TM4 and TCS vacuum pumping down is good so far.

TM4 HS line leak checks are done, at SHC and TCS. SHC: Helium spray. TCS: Helium  pressurize 70psi.  LD base LR 0.0 X E-9 atm.cc/sec.  No leak has been found on both leak checks. 

The results of the electrical check of TM#4 with UC#21 attached.

 TM#4 with UC#21 has been moved from the south hot cell to the conditioning station.

Ta#52 has been removed from TM$ and UCx#21 installed with new mounting and high current hardware. High current fasteners torqued to 130 in lbs.

 TM#4 with Ta#52 has been moved from the east station to the south hot cell.

 The BIAS voltage was brought up to 70 kV today and held there for 1h. No sparking observed.

 Roof blocks IRH1641, IRH1642, IRH1643, and IRH1644 have been fully assembled, labeled, and installed as per drawing IRH1652.  Fabrication of TCS shield block (IRH1646) and NHC module port block (IRH1645) is still in progress.

The ISAC active sump in the Active Service Room (#002 on B2 level) was pumped out yesterday using the standard procedure (Section 5.5.2 of the ISAC Operators' Manual, V1.0).  The procedure makes use of the auto stop feature of the pump-out system which stops when a low level float switch is triggered.  The water level was measured after pumping stopped, and was found to be approximately 21" above the base of the sump.  A new section of pipe will be added to the 4" drain line in the sump to move the drain opening below the low level water line so that air in the sump is not pulled into the drain network (which could end up in the NHC or TCS space).

Travis Cave wrote:

TM#2 with Ta#53 has been moved from the conditioning station to the west target station.

 by Travis (measured at ~ 2' from module on service tray side):

at 3' 325 uSv/h

at 2' 640 uSv/h

Travis Cave wrote:

The electrical check of TM#2 with SiC#36 attached. Post beam at the south hot cell. See attached results allow the before beam electrical check results are posted here as well.

by David and Chad after target removed from module:

Anode to target @500V - 65Kohm
Anode to HS - dead short
Target to HS@500V -62Kohm.

 The NHC drain line was tested by pouring approximately 10 gallons of water through the drain grate at the base of the NHC partition wall.  Water was seen a few minutes later pouring into the sump labeled "ACTIVE SUMP" from the light coloured pipe on the west side of the inside of the sump.  Rob Walker had previously said that the hot cells drain into the sump next to this one which is labeled "SANITARY SUMP", which appears to be incorrect.

TM#2 with Ta#53 has been moved from the conditioning station to the west target station.

 Thursday, August 03, 2017, 17:08: Restarting vacuum and water system

 The spent SiC#36 has been moved from the south hot cell to the spent target vault.

After re zeroing alignment telescope to master jig and adjusted parts into place:

Orientation: X = Left -, Right+; Y = Up +, Down -

Front wire target

X = 0.000, Y = 0.000

Rear wire target

X = 0.000, Y = +.008" (high)

All fasteners torqued to specification, steerer housing and assembly not installed yet. Weight of steerer assembly might cause rear to sag into place. Otherwise may attempt to split difference between the front and rear elements (alignment is on an angle in the horizontal vertical plane.)

HS line is leak checked at SHC this afternoon by helium spay.  Leak detector base LR 0.0 XE-9atm.cc/sec. Base pressure 0.0Xe-4 torr. No leak has been found. This line will be helium pressured  at TCS. It had  a 1.7XE-7 atm.cc/sec leak rate on 70 psi helium at TCS  during last two target  checks.

 2017-08-03. Helium pressure test on TM2 HS line at TCS is done. 70psi helium, 3 minutes. base leak rate 0.0xE-7 atm.cc/sec. Result: 1.8XE-7atm.cc/sec leak which is almost same as before. This line has a very small leak on water block seal under helium pressure test  which we knew already. 

Tm2 was disconnected in ITW yesterday. ITW EL cable crimp ring was broken. John Chow replaced this ring this afternoon.