Wednesday, April 18, 2012, 12:15: Blanked off cooling lines. Chamber ready to be pumped down.

Wednesday, April 18, 2012, 12:16: TSGRP1 makes unusual noise when attempting to pump down vacuum chamber. Roughing aborted for now. Edi Dalla Valle is informed. He will have a look at it after lunch.

Wednesday, April 18, 2012, 13:08 Anders Mjos wrote:

Wednesday, April 18, 2012, 12:15: Blanked off cooling lines. Chamber ready to be pumped down. Wednesday, April 18, 2012, 12:16: TSGRP1 makes unusual noise when attempting to pump down vacuum chamber. Roughing aborted for now. Edi Dalla Valle is informed. He will have a look at it after lunch.

 Wednesday, April 18, 2012, 13:08: Started pumping down again with Edi present. No noise was observed.

Wednesday, April 18, 2012, 13:10: Roughing the vacuum chamber.

Wednesday, April 18, 2012, 13:34 : Turbo pumps started and at speed. Pressure 3.5 E-5 torr

 When the target was removed from the test stand it was discovered that the custom designed insulator stand-off (ITD0400 made from Mycroy 1100) had swollen and become discoloured in the area exposed to "heat shine" from the target oven. See attached pdf for photos of the insulators.

The heat shield lid was opened up and the target temporarily removed to replace the two insulators that had failed. These were replaced with the commercially available glazed steatite stand-offs. The target had some marks from the insulators which was cleaned with acetone and methanol.

After replacing the insulators, the target assembly was assembled, leak checked and a new electrical check was performed.

Additional photos are available on DocuShare

Friedhelm Ames wrote:

connected A(CH3)3 instead of He, pumped line and valve with pump on the high voltage rack.. Opened regulating valve first response at mass 27 with valve set point at 7.0.

 The bottle with Al(CH3)3 was removed from the test stand yesterday April 25.

comments in e-mail from Marik:

Anders & I took the Al(CH3)3 bottle out of the test stand & put it in the middle fume hood of lab 07.  There was some puffs of white "smoke" when Anders unscrewed the VCR coupling.  Likely some trapped liquid that oxidized on air exposure.  If at all possible, I would suggest a vertical orientation in the Faraday cage.

-Marik 

 TSGIG1 has timed out. As seen on the attached screen shot, the IG has been out since 17h May 1st.

Anders Mjos wrote:

TSGIG1 has timed out. As seen on the attached screen shot, the IG has been out since 17h May 1st.

 Wednesday, May 09, 2012, 09:15: ISAC Fault Report submitted

Anders Mjos wrote:

Anders Mjos wrote:  TSGIG1 has timed out. As seen on the attached screen shot, the IG has been out since 17h May 1st.  Wednesday, May 09, 2012, 09:15: ISAC Fault Report submitted

 Thursday, May 10, 2012, 08:12: Venting vacuum chamber for Edi - to repair the Ion Gauge.

Thursday, May 10, 2012, 08:45: Vented.

Anders Mjos wrote:

Anders Mjos wrote: Anders Mjos wrote:  TSGIG1 has timed out. As seen on the attached screen shot, the IG has been out since 17h May 1st.  Wednesday, May 09, 2012, 09:15: ISAC Fault Report submitted  Thursday, May 10, 2012, 08:12: Venting vacuum chamber for Edi - to repair the Ion Gauge. Thursday, May 10, 2012, 08:45: Vented.

 Thursday, May 10, 2012, 09:38: Ion Gauge filament replaced by Edi.

Thursday, May 10, 2012, 09:48 : Pumping down.

Thursday, May 10, 2012, 10:17: Ion Gauge reading vacuum at 1.3 E-5 torr.

Did a local IOC reboot to cure to white-out. The test stand is now operational.

Rick and John installed the ITE-TM4-SiC#27-HP-SIS-May2012 in the Test Stand. Pumping down.

The vacuum on TSGIG1 reads 2.85e-07. Turing on water on teststand and observing any changes in vacuum pressure.

Target needs to be removed form teststand to remove heatshielding around target oven. The chamber will be vented, water circuits flushed and target removed.

 Tuesday, May 15, 2012, 10:13: Turbo pumps at speed. Vacuum at 1.4E-5.

Tuesday, May 15, 2012, 12:03: Cooling lines opened. Vacuum stable at 1.6E-6

Tuesday, May 15, 2012, 12:17: Target ready to be heated and biased.

Did the HV conditioning up to 30kV and started to ramp up the heaters to 580A and 230A.

 A chip of insulator material was detected below the lower target insulator stand-off (attachment - left picture). The chip may come from the tube heater insulator above (attachment - right picture). The chip will be further investigated when the target is removed.