Source tray meggered today by Anders and Keith

GND - MSP OL @ 1000V
MSP - EE OL @ 1000V
EE - GND OL @ 1000V
4x Steerers - GND OL @ 500V

Steerer continuity verified from socket to steerer plates
(looking in the direction of the RIB, labeled top to bottom on sockets)

1 - Top
2 - Left
3 - Right
4 - Bottom

Chad and I leak checked TM4 HS line after new target is installed yesterday. No leak has been found. Also, I helium pressurized the HS line at TCS this morning. TM4 HS line is good on this test. The TM4 gas line configuration on TM4 top is leak check as well. No problem.

 Two minor chips in the main 60 kV insulators on the source tray was inspected today by Anders, Tom and Aurelia. The chips are small enough that they should not be a problem. See photos for details.

 After extensive troubleshooting the communication fiber was found to be damaged and has been replaced by Gelo.

Shielding plug is installed onto TCS. TCS is being pumped down to keep it under vacuum for the rest of the year.

Pete Dudley, manipulator service technician from CRL, was on site from Nov 27-30 to service the NHC Model N manipulators (See E-log entry #1578 for background).

He began by evaluating the motion selection and electric drive of the manipulator installed on the blue service cart.  This manipulator had chip A0166R01, same as the right side manipulator which had the failure described in E-Log 1578.  Pete noted that the arm was very slow to switch between the different drive directions, and had a significant lag between when the switch for motion was released, and when the motor actually stopped driving.  This was the case with all directions.  Because of this, he suspected that the right arm Z tape broke because when the manipulator reached the switch at the end of travel, the motor did not stop quickly enough causing over tension and snapping the tape.  A newer chip, A0166R04, was removed from the spare master arm (received Spring 2017), and installed into the master arm on the blue cart.  The test was repeated, and this time the motion selection and drive worked as expected.  The situation which previously caused failure was evaluated:  slave end fully extended in Z, master end fully collapsed in Z.  In this configuration the arm was moved back and forth in the Y direction.  No tape failure occurred, and the Z motion tape tension seemed normal.  Y motion drive was attempted, and was not possible, as expected.  This test was repeated in the opposite configuration (slave end fully collapsed, master end fully extended) with the same results.  Full drive speed was used for all tests.

The right side slave arm (with broken Z tape) was then removed and transported to the HCSA.  Using the bench mounted locking plate, the broken Z tape was replaced, and a full inspection and cable/tape tensioning was performed.  Pete accidentally broke the Z tape on the right side master arm while investigating the failure, which was also replaced.

The other two slave arms were also both inspected, tensioned, and tested in the same way.  Then all three were each in turn installed to the master arm #9348 on the blue manipulator transport cart where all mechanical motions and drives were tested (except X, because mounted on cart), the failure situation described above was also tested for all three slave arms.

The left side manipulator was then installed into the wall.  It was necessary to remove the lead sheilding on the thru-tube and machine it down approximtaely 0.070" in order for the arm to fit into the wall tube.  After installation, the manipulator motions and drives were tested again including the X motion, and the failure scenario situation was also re-tested.  Chad used the left side manipulator to remove and re-install the pre-filter mounted on the west side partition wall.  He also confirmed that he could reach the east wall electrical outlets and the outlets, gas fittings in front of the window.

The right side slave arm was adjusted so that the Y position was moved 1/2 turn of the shaft drive towards the window (this is the maximum adjustment possible before it hits a hard stop).  This was done so that the operator can more easily reach the outlets and air/gas connections inside the cell in front of the window.  Because both the master and slave ends protrude further out from the wall compared to the E-HD manipulators for the SHC, this modification makes the NHC manipulators feel a bit more like the SHC manipualtors for the operator.  After the adjustment, the right side slave arm was installed.  The left side slave arm was removed, adjusted the same as the right side, then reinstalled.  The spare slave arm was also adjusted in the same way.

The right side manipulator was evaluated through all mechanical motions.  We attempted to remove the A0166R04 chip from the left side, and install in the right in order to try the motion drives, however the pins had been damaged from the previous removal/install, and eventually one pin broke so this was abandoned.  CRL will ship us at least three new A0166R04 chips which should arrive in 2-3 weeks.

Upon completion of the work the location of the different arms is as follows:  Right side master #9351, Left side master #9348, Spare master #9763, Right side slave #9349, Left side slave #9764, Spare slave #9352

 Dakine is on site to do maintenance on the chiller. The tech requested the chiller to operate.

The Source tray was inspected in the RH shop today by Anders, Friedhelm and Jens. The routing of the lines are satisfactory, however a design proposal to remove the ground electrode line will be made. This design will have to ensure a proper connection from the electrode to ground (using the window cooling lines). All other lines are OK at this point. Some fine adjustments are expected after brazing and soldering to maintain high voltage separation. Photos are available on DocuShare Collection-21401

 The power to the crane and controls were turned off using the power switch in the Crane Control room.  The main disconnect switch in the target hall was not touched.

All site power will be off for a period of time during the Christmas break and this removes the crane from any issues when power is restored.

The target hall crane has been powered down by Don today in preparation for the power shutdown over the Holidays.

Powered down mechanical pumps in ISAC-I Experimental hall, vacuum gauge and turbo pump controllers in ISAC-I B2 North Hot Cell service area

Stopped MP1 today in preparation for the power outage over the holidays. both P-25 and P-26 breakers have been switched off to prevent inadvertent start of system

High active water system  was  checked before restart. A small water leak on resin can supply valve was found. It is fixed. MP1 and MP2 were started and checked separately. System pressure and flow rate are normal.MP1 is in operation now. 

Eric and I finished ITE annual water interlock check. Everything works properly.

Tuesday, January 02, 2018, 14:45: TP1S started

Tested all 3 compressors and MP2

TCS:IG1S is reporting vacuum levels that seem to be too low (1E-10 to 1E-8 Torr). The gauge was connected to the controller for IG1, which showed the same value. A degas was performed for ~5 min.

The old resin tank has been stored in silo since last year March.  Without crane the tank up, We use the pole monitor measured the field around the bottom of the tank in silo. The average contact field on the bottom is about 4.0msv/hr. @0.5meter , the field is about  900usv/hr. It is still too hot to remove it.

The old TM2 Source Tray from 2009 has been moved to Cyclotron basement this morning. Source tray was stored in location 9. The box was moved from the vault to the ante-room yesterday. No contamination was found on the box.

I stopped TCS vacuum pumps for coming TM3 move.