• gas lines purged with air for 60 min (through TSHUHV1 and TSHSV4).
• gas line allowed to fill with nitrogen to 300 torr and evacuated. repeated 3 times.

Thursday, July 12, 2012, 15:48: bypass removed

System will be vented and gas lines purged with air, then nitrogen.

Thursday, July 12, 2012, 09:43: Shut down TSGTP1B.

Shut down TSGTP1A due to noise (possibly from bearings) after consulting Edi.

Wednesday, July 11, 2012, 15:27: Started TSGTP1A and 1B

Wednesday, July 11, 2012, 15:31: Started TSMTP2 and 6

Wednesday, July 11, 2012, 15:33: TMS tubos at speed. Vacuum 4.8E-7

Wednesday, July 11, 2012, 15:34: TSG turbos at speed. Vacuum 9.5E-6

A new turbo has been installed. Eddie said the other one had crashed but not catastrophically. He recommends the test stand be wiped clean before pumping because there is a fine layer of Aluminum dust on the chamber base.

Restarted the PC at the Test Stand.

Restarted the Archivers; currently pumping down the separator area.

switched everything off to prepare for scheduled power outage on Monday

turbo pump TSG:TP1B has tripped off. Cannot be restarted. Fault report to vacuum. Everything switched off again

heater ramping up again with Ne leak closed.

A big vacuum excursion tripped the source off at about 1am. The vacuum did not fully recover afterwards only down to about 1.3e-6T. Ne leak has been closed and vacuum went down to 6e-7T within a few minutes. After the trip the current of the magnet stayed constant. Fluctuations may have been caused by high voltage sparks.

Friedhelm Ames wrote:

The current at the magnet power supply TMS:MB1 shows fluctuations every 1-2 minutes. The same can be seen in the Hall probe read back and in the beam current at Fc6.

 a fault report has been issued to power supplies group. Dan Louie will look into it.

The current at the magnet power supply TMS:MB1 shows fluctuations every 1-2 minutes. The same can be seen in the Hall probe read back and in the beam current at Fc6.

tube heater ramping started

Found some water tripping in front of the high voltage power supplies rack from the water lines at the ceiling. Plastic sheets have been put on top of the racks and MCR has been informed.

Anders Mjos wrote:

Replaced grid containing ring (target side) with new ring. No contact between target and anode measured in lab. NOTE: While closing up the VCR fittings the tube rotated causing the tube to flatten in a bend. This may reduce water flow on the heat shield circuit. (see attachment) Wednesday, July 04, 2012, 15:33: Started roughing. Wednesday, July 04, 2012, 15:57 : Started turbos Wednesday, July 04, 2012, 16:03: Turbos at speed. Vacuum at 3E-5

 Thursday, July 05, 2012, 08:39: Water supply open. Vacuum stable at 5.9E-7. Due to the kink in the heat shield cooling line, flow in the heat shield line is lower than other lines (visually inspecting speed of paddle wheels).

Replaced grid containing ring (target side) with new ring. No contact between target and anode measured in lab.

NOTE: While closing up the VCR fittings the tube rotated causing the tube to flatten in a bend. This may reduce water flow on the heat shield circuit. (see attachment)

Wednesday, July 04, 2012, 15:33: Started roughing.

Wednesday, July 04, 2012, 15:57 : Started turbos

Wednesday, July 04, 2012, 16:03: Turbos at speed. Vacuum at 3E-5

Friedhelm Ames wrote:

A short in the anode has developed during the heater ramp up. Increasing the current limit did not cure it. Start heater ramp down to investigate.

 Wednesday, July 04, 2012: short found between anode and target. probably caused by the target tube coming in contact with the anode due to bending of the tube caused by heating and deformation of the grid retaining ring. see attachements