Thursday, September 19, 2013, 15:35

UO2/C green was prepared on Aug 17, 2013. The slurry was cast on a piece of glass coated with WD40.

The cast was let dry until Aug 19, 2013.

Initial UO2 powder used = 49.97g (Inventory R-00835A UO2 + bottle = 745.42 before use)

Graphite powder used = 10.12g

Green cast dried UO2/C + organic mass = 59.62g

The green was rolled up and wrapped in a piece of graphite sheet.

The Ta-target boat was wrapped with 3-Ta layers of heat shield and installed in Evap1 on Sept 19, 2013.

Chamber is currently being pumped down. IG1 @ 9.97e-12T.

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

Laura Lambert wrote:

Thursday, September 19, 2013, 15:35 UO2/C green was prepared on Aug 17, 2013. The slurry was cast on a piece of glass coated with WD40. The cast was let dry until Aug 19, 2013. Initial UO2 powder used = 49.97g (Inventory R-00835A UO2 + bottle = 745.42 before use) Graphite powder used = 10.12g Green cast dried UO2/C + organic mass = 59.62g The green was rolled up and wrapped in a piece of graphite sheet. The Ta-target boat was wrapped with 3-Ta layers of heat shield and installed in Evap1 on Sept 19, 2013. Chamber is currently being pumped down. IG1 @ 9.97e-12T. 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

 Friday, September 20, 2013, 13:48

Chamber has been pumped down overnight.  IG at 6.2e-6 Torr, BP @ 32mT.

Stepping up TGHT to 30A.

 Friday, September 20, 2013, 15:12

TGHT auto ramping initiated.  

 Monday, October 07, 2013, 14:09

TGHT has reached to 520A/5.5V.

Vac at 7.7e-6 Torr. 

The carbonization process is complete.

Auto-cooling is initiated at 2A/min, and the chamber will be vented in Ar after the target is cooled.

 Thursday, October 09, 2014, 13:36

*update* RENAME: batch #07 - 09192013 to UC2Flk_00 used for UCx#11

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.

 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

 Tuesday, April 19, 2016, 09:47

Temperature measurements have been taken in evap2 on target containers. 

Previously all UCx targets have been conditioned in evap1 at 520A. The respective target containers TaC coating was sintered in evap2 at a different current.

All future UCx targets will now be conditioned in evap1 at the same current required to reach 1900C in evap2 when sintering the TaC coating on the container to be used for the respective target.

ie. If a container is being sintered in evap2 at 450A [1900C], this same container is used for UCx - then that specific UCx target will be conditioned in evap1 at 450A.

Confirm full carbonization has been achieved by following with the vacuum on the strip tool and make sure the final vacuum comes down at the end of the whole process.

 Monday, May 16, 2016, 15:51

full clean of inside evap1 this afternoon.

 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.

 Thursday, September 21, 2017, 11:32

Copper plate attached to TBHT to allow current to be applied.

Started pumping down this a.m.

Roughing pump sounds normal.

Currently Ion Gauge times out before turning on, will attempt again later when lower vacuum achieved...

 Monday, September 25, 2017, 13:30

Ion Gauge hadn't been fully hooked up via eipcs yet.

Ramped down last week/ vented/ hooked up ion gauge in epics/ restarted IOC - now updated and good to go.

Started pumping down again this a.m.

Roughing pump sounds normal.

Ion gauge working well!

IGP1 = 2.7e-5 Torr

 Wednesday, September 27, 2017, 09:20

Cooled down, vented in air and opened up yesterday.

TBHT ran well -  readout on power supply and readout on striptool were very close.

Roughing pump ran smoothly - nothing other than usual problems.

Sometimes when roughing pump is 1st turned on it chokes up and sounds TERRIBLE. At this point if you turn it off and leave it for a few seconds then try turning it on again it usually works fine.

Ion gauge ran well - direct readout vs striptool readout are slightly off because the direct readout is in mBar and the striptool in Torr.

One minor thing noticed with the new ion gauge - when water is turned on the vacuum increases very minorly by ~5e-8 Torr.

This wouldn't show up with the old Ion Gauge - maybe the new one is slightly more sensitive?

Otherwise everything ran great 

 Tuesday, November 07, 2017, 11:55

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