Today: did a mass scan at 580A on TGHT and 230A on TBHT at 30kV. Found some A/q units discrepancies on the mass scan page. It may be a hall probe problem:  under investigations.

Uploaded the testing file on Docushare: http://documents.triumf.ca/docushare/dsweb/View/Collection-8539/Document-56575

Started the cool down.

During the mass scan today it was discovered, that the mass calibration was off. Further investigation showed, that the Hall probe readings are a factor of 1.31 lower than during previous measurements. A fault report has been issued to controls.

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

Anders Mjos wrote:

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.

 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.

 Thursday, May 17, 2012, 13:15

After the test-stand, the EE was removed for inspection.  It was discovered that there were some solid residues coated on the extraction electrode and the common plate, but the ionizer tube was clean (see attachment#1).  Some samples were collected and will try to do some analysis.  This problem has been seen before but it's still not clear why the solid residues form after the test-stand.  

The EE & the common plate were cleaned with acetone and re-assembled back to the target.  

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.

Thursday, May 31, 2012, 14:46: Switching off turbos

Thursday, May 31, 2012, 15:05: Venting

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.

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.

Aurelia Laxdal wrote:

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.

 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

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

Anders Mjos wrote:

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

 Tuesday, June 26, 2012, 16:06: Turbos off.

Tuesday, June 26, 2012, 17:20: Vented.

 A crack in the insulator ITD0054 was observed while mounting the target assembly. See attachment.

The ISAC test stand is ready for cathode heating.

Bias voltage: 30000 V

Bias current: 37 microAmp

Anode bias: 200 V

Anode current: 6.105 mA

Cathode current: 0 Amp

Cathode voltage: 0 V

Coil current: 30 A

Coil Voltage 0.2 V

EE Voltage: 1800 V

EE current: 30 microAmp

Einzel Lens voltage: 14000 V

Einzel lens current: 49 microAmp.

Just a quick check at the Test Stand:

1. The system operational (  white out not present ) with TSH:TBHT heating in progress.

2. Started the Archivers: for Source and Optics.

3. Removed bypass on TSH:SV5 since it's not necessary anymore.

4. Currently: TSH:TBHT=107A

Now ramp cathode current up to 290 A. The total current out is 1.e-7 A.