Work covered under work permit 2013-11-01-3 and performed by Anders and Rick with the help of Danno (RPG).

No significant contamination was found during the work. The old window could be disposed as normal waste.

The right connector for the TGHT had rotated. It has now been repositioned and both connectors have been tightened to reduce the chance for further rotation.

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).

 Monday, March 24, 2014, 17:50

UO2/C cast was prepared on March 21 and let dry over the weekend.  The cast looks pretty good, and it was rolled up and wrapped in a piece of graphite sheet. 

The Ta-target boat was wrapped with 3-layers of heat shield and installed in EVAP1.

Chamber is currently being pumped down.

Target will be ramped up to 520A at the rate of 0.1A/min.

Vacuum limit stop at 5.0e-5 Torr, backing off at 6.0e-5 Torr.

 Tuesday, March 25, 2014, 15:55

Chamber has been pumped down to 6.8e-6 Torr. BP 47mTorr.

Stepping up TGHT 35A/0.264V.  Vac stabilizing at 6.0e-5 Torr. 

Tuesday, March 25, 2014, 17:43

Auto-ramping initiated.

 Friday, April 11, 2014, 11:49

TGHT reached to max 520A.

Carbonization process is complete (see attachment)

IG at 9.3e-6 Torr.

 Cooling down TGHT at 2A/min

Will vent the chamber with Ar on Monday

 Monday, April 14, 2014, 16:41

UC2 flakes was removed from the chamber and transferred in to the Ar glovebox.

Evap off.

Tuesday, May 20, 2014, 16:01

Target boat contains one pellet of carbon mesh coated with UC2.  The sample was prepared in the Ar-glove box and the container is wrapped with 2 layer of Ta foil (it wasn't easy to do the wrapping).

Chamber is currently being pumped down.

TGHT will be heated up to 600A. 

Wednesday, May 21, 2014, 11:40

Chamber has been pumped down overnight, vac @ 6.7e-6 Torr.

Tuesday, May 27, 2014, 10:51 

TGHT was heated up to 600A and stayed for 12hrs before cooled down (see attachment).

EDX/SEM/XRD will be done soon...

More information about this sample structure can be found here: https://www.dropbox.com/sh/hirm808pgjwzg71/AAB1-kP399IbIa8AGdI-OMGua

 Friday, June 13, 2014, 14:57

Chamber was vented and cleaned for UCx target production. 

Will re-visit this later...

 Thursday, August 14, 2014, 17:54

Target container consists of 240 discs of ThO2/Nb discs.  The container is not required to be wrapped with Ta-heat shields.  

One end cap is inserted on the left end (wrt to the ionizer pointing into the page).  

The chamber is currently being pumped down.  

TGHT will be heated up to 520A, ramping rate at 0.1A/min.

 Friday, August 15, 2014, 15:55

A sampling filter has been installed by RPG; this will be used to analyze any volatile particle releases out from the target. 

An alpha monitor is being install on the exhaust line; air sample will be collected for further analyzse.  

Vacuum has come down to 7.2 e-6 Torr.  

Target heat will be ramped up on Monday since it is coming late to the day.  

Chamber will continue to pump down.  

Next week, RPG will start taking the first air sample before the target is heated up.  More discussion on that later...

 Monday, August 18, 2014, 11:18

Chamber has been pumped down over the weekend. 

Pressure @ 2.67e-6 Torr. 

Note:  RPG decides not to take any gas sample since the filter installed in between the backing and turbo pumps is sufficient for the analysis.

TGHT stepped up to 30A.

 Monday, August 18, 2014, 14:17

TGHT stepped up further to 40A; Pressure stabalized >100min at 4e-6 Torr, bp @ 44mTorr.

Initiated auto-ramping.

 Thursday, August 21, 2014, 17:20

TGHT continues to ramp up and pressure is coming down - Currently @ 7.7-6 Torr.

Increased TGHT ramping rate to 0.5A/min. 

The sintering process will be complete by Friday (Aug 8, 21), and the chamber will be cooled down over the weekend.

By Monday, the chamber can be vented in air, and the target can be removed from the chamber.  Then RPG can remove the filter in the backing pump for the analysis.

 Friday, August 22, 2014, 08:57

TGHT has reached to 520A for just over 10 hrs.  Vac at 8.6e-6 Torr, BP @ 40mTorr.

Cooling initiated at 2A/min

 Friday, August 22, 2014, 16:52

Target was cooled to room temp and was removed from the chamber.

5 discs were removed from the target because it was shrunk up; the rest of the discs were fine.  

2 extra Nb foils and end cap were inserted. 

Target is stored in the Hotlab - awaiting to be assembled.

 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

 Monday, March 09, 2015, 16:55

After upgrading IOC for CXML program, experienced some issues; therefore, switched to same software as EVAP2.

Testing new software.

Chamber currently pumping down.

 Tuesday, March 10, 2015, 10:46

Chamber pumped down.

Initiated auto-ramp - not working, compilation errors...

 Tuesday, March 17, 2015, 11:47

Keiko fixed software update and rebooted IOC.

Everything seems to be working now.

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.