 Friday, April 20, 2012, 08:56, Anders Mjos, Nb#6, LP-SIS, ITW, TM1, , , Problems/Solutions, Insulator stand-off failure 
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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 |
 Thursday, April 26, 2012, 09:14, Anders Mjos, , , , , , , , removed Al(CH3)3
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| Friedhelm Ames wrote: |
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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.
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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 |
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Wednesday, May 09, 2012, 08:56, Anders Mjos, , , , , , , Problems/Solutions, TSGIG1 not working
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TSGIG1 has timed out. As seen on the attached screen shot, the IG has been out since 17h May 1st. |
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Wednesday, May 09, 2012, 09:16, Anders Mjos, , , , , , , Problems/Solutions, TSGIG1 not working
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| Anders Mjos wrote: |
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TSGIG1 has timed out. As seen on the attached screen shot, the IG has been out since 17h May 1st.
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Wednesday, May 09, 2012, 09:15: ISAC Fault Report submitted |
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Thursday, May 10, 2012, 08:13, Anders Mjos, , , , , , , Problems/Solutions, Venting for TSGIG1 repair
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| Anders Mjos wrote: |
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| Anders Mjos wrote: |
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TSGIG1 has timed out. As seen on the attached screen shot, the IG has been out since 17h May 1st.
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Wednesday, May 09, 2012, 09:15: ISAC Fault Report submitted
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Thursday, May 10, 2012, 08:12: Venting vacuum chamber for Edi - to repair the Ion Gauge.
Thursday, May 10, 2012, 08:45: Vented. |
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Thursday, May 10, 2012, 09:48, Anders Mjos, , , , , , , Problems/Solutions, Ion Gauge filament replaced
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| Anders Mjos wrote: |
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| Anders Mjos wrote: |
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| Anders Mjos wrote: |
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TSGIG1 has timed out. As seen on the attached screen shot, the IG has been out since 17h May 1st.
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Wednesday, May 09, 2012, 09:15: ISAC Fault Report submitted
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Thursday, May 10, 2012, 08:12: Venting vacuum chamber for Edi - to repair the Ion Gauge.
Thursday, May 10, 2012, 08:45: Vented.
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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. |
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Tuesday, May 15, 2012, 10:14, Anders Mjos, SiC#27, HP-SIS, ITE, TM4, , , In progress, target ready to be heated and biased
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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. |
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Wednesday, May 16, 2012, 16:01, Anders Mjos, , , , , , , Problems/Solutions, Loose chip of insulator material detected
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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. |
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Thursday, May 17, 2012, 08:36, Anders Mjos, SiC#27, HP-SIS, ITE, TM4, , , Done, Target removed
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Thursday, May 17, 2012, 08:36: Turbo pumps switched off in preparation of target removal.
Thursday, May 17, 2012, 08:51: Purging cooling lines.
Thursday, May 17, 2012, 08:55: Venting.
Thursday, May 17, 2012, 09:21: Target removed |
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Thursday, May 17, 2012, 12:19, Anders Mjos, SiC#27, HP-SIS, ITE, TM4, , , Problems/Solutions, Loose chip of insulator material detected
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| Anders Mjos wrote: |
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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.
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The chip came from the lower insulator stand-off on the target assembly (see attachment). After investigating the chipped insulator, it was decided (Pierre, Friedhelm, Anders) not to replace it - as the risk involved may be less than the risk involved in replacing. |
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Thursday, May 17, 2012, 15:14, Anders Mjos, , , , , , , , Pumping down empty chamber
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Thursday, May 17, 2012, 15:14: Started roughing. Cooling lines blanked off.
Thursday, May 17, 2012, 16:52: Starting turbos.
Thursday, May 17, 2012, 17:00: Turbos at speed. Vacuum at 1.5E-5. |
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Thursday, May 31, 2012, 14:46, Anders Mjos, , , , , , , , Venting in preparation for Ta#38
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Thursday, May 31, 2012, 14:46: Switching off turbos
Thursday, May 31, 2012, 15:05: Venting |
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Thursday, May 31, 2012, 15:43, Anders Mjos, Ta#38, LP-SIS, ITW, TM1, , , In progress, Target ready to be heated
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Thursday, May 31, 2012, 15:42: Roughing
Thursday, May 31, 2012, 16:01 : Starting turbos
Thursday, May 31, 2012, 16:08 : Turbos at speed. Vacuum 1.7 E-5
Friday, June 01, 2012, 08:08: Cooling water opened. Vacuum stable at 5.7E-7. Target ready to be heated and biased. |
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Monday, June 04, 2012, 10:51, Anders Mjos, Ta#38, LP-SIS, ITW, TM1, , , Done, Venting chamber
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| Aurelia Laxdal wrote: |
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Did the HV conditioning.
Heaters conditioning in progress.
The Hall probe is not working: couldn't pass 35.5 units (readback) or 50.16 units (setpoint) at field -3710G.
Tried to turn ON/OFF magnet PS and to reboot Canbus, but nothing worked. Still waiting for E-Fault 6031 to be resolved.
Started cool-down.
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Monday, June 04, 2012, 10:51: Turbos switched off
Monday, June 04, 2012, 11:06: Purging water. Venting.
Monday, June 04, 2012, 11:36: Target removed |
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Monday, June 04, 2012, 11:40, Anders Mjos, , , , , , , In progress, Empty chamber
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HS water lines blanked.
Monday, June 04, 2012, 11:40: Roughing.
Monday, June 04, 2012, 11:58: Starting turbos.
Monday, June 04, 2012, 12:06 : Turbos at speed. Vacuum 1.5 E-5 |
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Tuesday, June 26, 2012, 16:06, Anders Mjos, , , , , , , Done, Vented
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| Anders Mjos wrote: |
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HS water lines blanked.
Monday, June 04, 2012, 11:40: Roughing.
Monday, June 04, 2012, 11:58: Starting turbos.
Monday, June 04, 2012, 12:06 : Turbos at speed. Vacuum 1.5 E-5
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Tuesday, June 26, 2012, 16:06: Turbos off.
Tuesday, June 26, 2012, 17:20: Vented. |
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Tuesday, June 26, 2012, 18:04, Anders Mjos, FEBIAD anode end cap test, , , , Tube only, 38307-9, In progress, FEBIAD anode end cap test - ready
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Testing FEBIAD anode end cap as per dwg ITD0304 REV C
Target with TUBE ONLY. Do not use target heater.
Tuesday, June 26, 2012, 18:03: Roughing
Tuesday, June 26, 2012, 18:24: Turbos started
Tuesday, June 26, 2012, 18:31 : Turbos at speed. Vacuum at 1.8E-5
Wednesday, June 27, 2012, 08:48: Cooling opened. Vacuum stable at 4.2E-7. Ready for testing.
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Tuesday, June 26, 2012, 18:30, Anders Mjos, , , , , , , Problems/Solutions, Crack in source tray insulator
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A crack in the insulator ITD0054 was observed while mounting the target assembly. See attachment. |
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Wednesday, July 04, 2012, 13:07, Anders Mjos, , , , , , , Problems/Solutions, water lines purged
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| Friedhelm Ames wrote: |
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turbo pumps stopped to prepare for venting for anode short investigation.
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Wednesday, July 04, 2012, 13:07: Water lines purged |
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Wednesday, July 04, 2012, 15:33, Anders Mjos, , , , , , , Problems/Solutions, short in anode
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| Friedhelm Ames wrote: |
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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.
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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 |
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