The conductivity of the TGHT circuit will be measured with a copper bar shunt.

Monday, December 02, 2013, 16:00: Pumping down. 

Tuesday, December 03, 2013, 09:40: Stepped current up to 600A. Impedance of system ~0.7 mOhm. See attached graph for P(I).

Tuesday, December 03, 2013, 12:06: Stopped turbo. Vacuum at 1.3E-5 Torr

Wednesday, December 04, 2013, 09:20: Copper bar removed from vacuum chamber.

Test finished.

Tuesday, March 04, 2014, 15:43

Theses endcaps (4) were previously sinterred in Evap#2 but some surfaces were not fully sinterred. (See Evaporator2 E-log ID119: https://elog.triumf.ca/TIS/Evaporator_2/119)

The endcaps are inserted in a target boat wrapped with 3 heat-shields. 

Chamber is currently being pumped down. 

TGHT will be rampped up to 580A and heat for >4hrs.

John Wong wrote:

Tuesday, March 04, 2014, 15:43 Theses endcaps (4) were previously sinterred in Evap#2 but some surfaces were not fully sinterred. (See Evaporator2 E-log ID119: https://elog.triumf.ca/TIS/Evaporator_2/119) The endcaps are inserted in a target boat wrapped with 3 heat-shields.  Chamber is currently being pumped down.  TGHT will be rampped up to 580A and heat for >4hrs.

 Wednesday, March 05, 2014, 10:20

IGP1 = 9.2e-7 Torr.

TGHT was stepped up to 35A and stabilized after half an hour.

Auto-ramp initiated at 2.0A/min, max setpoint = 580A.

Vacuum started to climb too fast, auto-ramp aborted.

Will step up manually...

 Wednesday, March 05, 2014, 12:18

Slowly stepped up to 100A manually.

Vacuum stable.

Initiating auto-ramp at 1.0A/min

 Wednesday, March 05, 2014, 13:17

IGP1 = 9.8e-6 Torr.

Current = 200A

Vacuum stable.

Stepping ramping rate up to 2.0A/min.

 Wednesday, March 05, 2014, 16:12

IGP1 = 4.6e-5 Torr, TGHT = 548A

Stopped auto-ramp to allow vacuum to settle back down.

Waited ~10min

IGP1 = 3.6e-5 Torr

Re-initiating auto-ramp at 2.0/min

Laura Lambert wrote:

John Wong wrote: Tuesday, March 04, 2014, 15:43 Theses endcaps (4) were previously sinterred in Evap#2 but some surfaces were not fully sinterred. (See Evaporator2 E-log ID119: https://elog.triumf.ca/TIS/Evaporator_2/119) The endcaps are inserted in a target boat wrapped with 3 heat-shields.  Chamber is currently being pumped down.  TGHT will be rampped up to 580A and heat for >4hrs.    Wednesday, March 05, 2014, 10:20 IGP1 = 9.2e-7 Torr. TGHT was stepped up to 35A and stabilized after half an hour. Auto-ramp initiated at 2.0A/min, max setpoint = 580A. Vacuum started to climb too fast, auto-ramp aborted. Will step up manually...  Wednesday, March 05, 2014, 12:18 Slowly stepped up to 100A manually. Vacuum stable. Initiating auto-ramp at 1.0A/min  Wednesday, March 05, 2014, 13:17 IGP1 = 9.8e-6 Torr. Current = 200A Vacuum stable. Stepping ramping rate up to 2.0A/min.  Wednesday, March 05, 2014, 16:12 IGP1 = 4.6e-5 Torr, TGHT = 548A Stopped auto-ramp to allow vacuum to settle back down. Waited ~10min IGP1 = 3.6e-5 Torr Re-initiating auto-ramp at 2.0/min

 Wednesday, March 05, 2014, 23:02

End caps have been heated for 6.5 hours at 580A. Vac @ 7.4e-6 Torr. 

Auto-cooilng initiated at 2A/min. 

 Thursday, March 06, 2014, 14:48

The TaC on the endcaps is fully sinterred. (see attachment#1).

 Thursday, December 11, 2014, 10:16

water valve shut off for lab closure over the holidays.

 Friday, January 23, 2015, 15:02

water supply turned back on to EVAP1 and fume hoods

Saturday, August 29, 2015, 16:10: Roughing

Saturday, August 29, 2015, 16:10: Starting turbo

Saturday, August 29, 2015, 16:12: Turbo running. IG1 at 2.4E-4 T

 Monday, May 16, 2016, 15:51

full clean of inside evap1 this afternoon.

Tuesday, August 23, 2016, 17:33

Target boat coated with TaC (sprayed) and wrapped with Ta-heat shield. 

chamber is currently being pumped down. Vac currently at 3.3e-5Torr. 

TGHT to be ramped up to 580A.

Initiate autoramping at 0.1A/min

 Wednesday, August 24, 2016, 10:34

TGHT at 111A/1.07V.  Vac at 7.5e-6 Torr and coming down.

Increase ramping rate to 2A/min.

 Thursday, August 25, 2016, 12:01

TGHT has been stabilized at 580A/6.89V for over 24 hours.  Vac at 7.5e-6 Torr.

Initiated cooling at 2A/min.

 Monday, September 12, 2016, 17:30

Container was properly sintered.

Monday, September 12, 2016, 17:30

A bunch of end caps (12?) and a long Ta-wire in spring sharp  were coated with TaC coating and wrapped in a small sheet of graphite foil. 

Container is then wrapped with a sheet of Ta heat shield.

These caps and wires will be sintered in Evap 1, so they may be prompted to contamination from the uranium processes. 

I have no choice but to use Evap1 to do this work since we are falling behind with the schedule.  

In the future, please have all the materials (targets, end caps, binder, etc) well prepared. 

I do not know what is the required current to sinter the caps since there is no temp measurement.  So, the best is to go with how the container was sintered, 580A. 

Monday, September 12, 2016, 17:36

Chamber has been pumped down to mid 10-6 Torr. 

Auto ramp to 580A at 2A/min.

John Wong wrote:

Monday, September 12, 2016, 17:30 A bunch of end caps (12?) and a long Ta-wire in spring sharp  were coated with TaC coating and wrapped in a small sheet of graphite foil.  Container is then wrapped with a sheet of Ta heat shield. These caps and wires will be sintered in Evap 1, so they may be prompted to contamination from the uranium processes.  I have no choice but to use Evap1 to do this work since we are falling behind with the schedule.   In the future, please have all the materials (targets, end caps, binder, etc) well prepared.  I do not know what is the required current to sinter the caps since there is no temp measurement.  So, the best is to go with how the container was sintered, 580A.  Monday, September 12, 2016, 17:36 Chamber has been pumped down to mid 10-6 Torr.  Auto ramp to 580A at 2A/min.

 Tuesday, September 20, 2016, 10:41

vented in air and removed from evap1

managed to remove carefully using napkins and not touching boat directly with gloves as to avoid contamination.

endcaps and springs look good, fully sintered

one endcap looks like coating has started to peel off, possibly due to too thick of a TaC coating pre-sintering. see photos attached.

 Wednesday, May 24, 2017, 09:31

Last week the vacuum trip off point was changed to 8e-4 Torr when previously it was set to 8e-5 Torr.

Vacuum limits were set to stop at 5e-5 Torr and back-off at 6e-5 Torr

Now vacuum limits will be changed by an order of magnitude in an attempt to speed up the processes in the evaporator.

 Wednesday, June 07, 2017, 10:00-12:00: Cooling was split/routed from two bottom lines with tees and run to the turbo pump.

Thursday, July 13, 2017, 12:48

NOTE: hot lab reached 27degrees every day this week and went up to 28C today! 

This is with the small portable fan running.

27C was reached even with both evaporators off.

When at 28C: evap2 = ~1500C and evap1 = 35A

 Thursday, July 20, 2017, 15:58

Hot lab reached 30C today.

Small fan off - unsure if able to run due to contamination spread...

Both evap1 and evap2 were under vacuum but had not initiated ramping up yet.

Laura Lambert wrote:

Thursday, July 13, 2017, 12:48 NOTE: hot lab reached 27degrees every day this week and went up to 28C today!  This is with the small portable fan running. 27C was reached even with both evaporators off. When at 28C: evap2 = ~1500C and evap1 = 35A  Thursday, July 20, 2017, 15:58 Hot lab reached 30C today. Small fan off - unsure if able to run due to contamination spread... Both evap1 and evap2 were under vacuum but had not initiated ramping up yet.

 Thursday, July 27, 2017, 09:06

There was a broken valve motor affecting all ISAC rooms - temporary fix in place.

Ventilation in ISAC hot lab has been increased.

Temperature back to a reasonable level - currently sitting at 22C!

 Thursday, September 07, 2017, 11:00 -12:00

The roughing pump was disconnected from Evaporator 1, along with the exhaust/ventilation. No contamination was found on swipes.

The oil was refilled.

The roughing pump was then moved away from the PLC to allow access for Dave Morris. The RP can be reconnected and tested after the PLC work is complete.

Work permit # I2017-09-07-1

Wednesday, September 20, 2017, 08:00: 

-A new ion gauge was installed yesterday afternoon and the old one removed. The old IG was found to be contaminated (300 cpm) and as of 20/09/2017, it is double bagged and stashed underneath the evaporator for the time being. 

Completed under work permit: I2017-09-19-9

-The roughing pump was reconnected this morning without issue.

 Tuesday, November 07, 2017, 11:55

Interlocks limits updated/ changed to 100mTorr for both TGHT and TBHT by Ray