Tuesday, November 07, 2017, 11:58

Noise levels were checked with monitor by Terry.

Max readings in lab reached ~83dB but sat between 70-78dB in most areas.

This is under limit for requirement to wear ear protection [85dB].

To reach limit - noise levels would need to increase drastically.

Conclusion: ear protection not required in lab.

Recommended if working in there for long periods of time for personal preference, but not a requirement.

 Wednesday, November 22, 2017, 11:05

Eye wash installed yesterday, simple attachment on sink spout.

Easy to use, simply twist attachment 180 degrees.

Water for tap can be turned on before or after twist.

Adjust pressure/ temperature accordingly.

Auto shut-off for eye-wash at ~38C [100F] - no accidental eye-burning when trying to wash eyes!

 Tuesday, June 26, 2018, 09:30. Gloves on evap 1 changed out. 

The original right one was otrn. Left was o but worn. Both replaced with new gloves.

 Friday, August 17, 2018, 11:17

Four discs of UCx produced with the 1-step casting method were placed in a glass jar.

The mass of the discs was 0.400 g.

The glass jar with the discs were placed in the heating chamber of the IEVAP.

Currently IEVAP is pumping down until vacuum is in the order of  ~10^-6 Torr.

Friday, August 17, 2018, 16:28 

Final vacuum: 9.5x10^-6 Torr

IEVAP's heating chamber will be vented with air and the materials will be taken out.

 Friday, August 17, 2018, 17:27

Material was transferred to the glove box

 Monday, September 03, 2018, 10:17

Graphite insert fully loaded with UCx was loaded into previously TaC coated target container.

No end caps on Ta target container.

Weight of graphite tube + UCx discs = 27.118 g

Currently pumping down in evap1.

Tuesday, September 04, 2018, 10:17 

IGP1 = 4.02e-6 Torr

Tapped up TBHT and TGHT manually to 100 A @1 A/s with pauses of 20 s.

Wait for 40 min to pressure to stabilize.

Max pressure 1.38e-4 Torr.

Final pressure 5.93e-5 Torr.

Tuesday, September 04, 2018, 11:46 

Good vacuum 5e-1 Torr

Bad vacuum 8e-1 Torr

Initiating auto ramp for TGHT @ 10 A/min to a max setpoint of 520 A

Initiating auto ramp for TBHT @ 5 A/min to a max setpoint of 245 A

 After achieving 520 A with auto ramp, manually tapped to 599 A.

Manually tapped back to 550 A.

Marla Cervantes wrote:

Monday, September 03, 2018, 10:17 Graphite insert fully loaded with UCx was loaded into previously TaC coated target container. No end caps on Ta target container. Weight of graphite tube + UCx discs = 27.118 g Currently pumping down in evap1. Tuesday, September 04, 2018, 10:17  IGP1 = 4.02e-6 Torr Tapped up TBHT and TGHT manually to 100 A @1 A/s with pauses of 20 s. Wait for 40 min to pressure to stabilize. Max pressure 1.38e-4 Torr. Final pressure 5.93e-5 Torr. Tuesday, September 04, 2018, 11:46  Good vacuum 5e-1 Torr Bad vacuum 8e-1 Torr Initiating auto ramp for TGHT @ 10 A/min to a max setpoint of 520 A Initiating auto ramp for TBHT @ 5 A/min to a max setpoint of 245 A  Tuesday, September 04, 2018, 12:54  After achieving 520 A with auto ramp, manually tapped to 599 A. Manually tapped back to 550 A.

 Friday, September 21, 2018, 10:21

Ramping down heaters at 2 A/min and 1 A/min for TGHT and TBHT.

Marla Cervantes wrote:

Monday, September 03, 2018, 10:17 Graphite insert fully loaded with UCx was loaded into previously TaC coated target container. No end caps on Ta target container. Weight of graphite tube + UCx discs = 27.118 g Currently pumping down in evap1. Tuesday, September 04, 2018, 10:17  IGP1 = 4.02e-6 Torr Tapped up TBHT and TGHT manually to 100 A @1 A/s with pauses of 20 s. Wait for 40 min to pressure to stabilize. Max pressure 1.38e-4 Torr. Final pressure 5.93e-5 Torr. Tuesday, September 04, 2018, 11:46  Good vacuum 5e-1 Torr Bad vacuum 8e-1 Torr Initiating auto ramp for TGHT @ 10 A/min to a max setpoint of 520 A Initiating auto ramp for TBHT @ 5 A/min to a max setpoint of 245 A  Tuesday, September 04, 2018, 12:54  After achieving 520 A with auto ramp, manually tapped to 599 A. Manually tapped back to 550 A.

 Saturday, September 29, 2018, 20:52

Target is taken out from the chamber and transferred to the Ar glove box.

On Tuesday it was noted that evaporator 1 was not pumping down properly. It was vented and the seal & seal face wiped with a cloth. The initial pump down rate was faster, however after 48 hrs, it has still not pumped down to appropriate levels. 

Thursday, March 21, 2019, 08:59: IV1 closed & TP1 off. 

Oiled as per work permit:  I2019-03-26-2.

Tuesday, March 26, 2019, 08:53: Start RP1

Tuesday, March 26, 2019, 09:03: Holding at 0.303T on CG2. 

Tuesday, March 26, 2019, 09:10: Turned off RP1. Vent chamber slightly. Close VV1. Restarted RP1.

Open RV1.

Tuesday, March 26, 2019, 09:13: Vacuum stalls out at approx 0.300T.

Tuesday, March 26, 2019, 09:16: Shut off RP1. Contact Vacuum group.

 Checked as per work permit: I2019-03-26-5

Tuesday, March 26, 2019, 13:50: Filter checked. OK

Tuesday, March 26, 2019, 14:00: Tees checked. OK.

Tuesday, March 26, 2019, 14:05: Line / bellows. Fail

Tuesday, March 26, 2019, 14:11: New line / bellows. OK 

Tuesday, March 26, 2019, 14:19: TP1 on, IV1 opened. Vacuum @ 3.5e-05T and dropping.

Pumping down evap1. Dispose of the old line. Replacement successful. No contamination was found on the swipes.

Tuesday, March 26, 2019, 14:36: Vacuum @ 1.12e-05T and dropping. 

 Wednesday, March 27, 2019, 08:50

A graphite insert was set into a tantalum tube in the evaporator 2 for 3 days

The objective of the test was to determine the current and voltage required to reach 2000 C

Current 424.2 A, voltage 7.17 V, P = 3 kW 

details can be find here https://elog.triumf.ca/TIS/Evaporator_2/433

The test will continue for 2 weeks in the EVAP1.

 Good vacuum 5e-4 Torr

Bad vacuum 1.00e-4

Pressure IGP1 = 1.55e-6 Torr

The autoramp was set to 420 A, at 1 A/min,

Monday, April 01, 2019, 07:57

TGHT = 4.68 V, 424.32 A

IGP1 = 9.61e-7 Torr

Autoramop is set to -1 A/min to 0 A

Monday, April 01, 2019, 11:19 

IGP1=5.43e-7 Torr

At TGHT = 223 A and 2.1 V the autoramp was increased to -2 A/min

Monday, April 01, 2019, 11:20

Sudden and unexpected  pressure increment to 1.4e-5 Torr, might be a glitch.

Monday, April 01, 2019, 13:10

IGP1 = 4.34e-7Torr

The autoramp was stopped at TGHT = 17.28 A, 0.0625 V,

and it was lower down to 0 A manually

 Results: The tantalum tube deformed in the contact points with the graphite insert

 Friday, April 05, 2019, 10:04

A tantalum tube was coated with TaC and wrapped with Ta heat-shield (3 layers)

Desired temp = 1900 C (expected TGHT ~445A/7.5V), TBHT will be set fixed at 230A (max).

Yesterday the tube was set in the EVAP1 and pumped down.

Friday, April 05, 2019, 10:07 

IGP1= 1.61e-6 Torr

The current is manually tapped to 40 A.

Friday, April 05, 2019, 13:25

After ~2 hours 

IGP1 = 1.54e-6 Torr

TGHT = 0.61 V, 40.39 A

Autoramp is set to 1 A/min to 400 A

Good vac at 3.00-5 Torr

Bad vac at 5.0e-5 Torr.

Sunday, April 07, 2019, 9:00

The current was increased to 424 A

Monday, April 08, 2019, 16:36

EVAP1 vented with air, sintered tube was removed. 

 Wednesday, April 10, 2019, 13:30

Tantalum foil caps were added to a graphite insert (see picture caps)

 The insert was set in a tantalum tube previously coated and wrapped with 3 Ta sheets.

The system was installed in the EVAP1, and it will be heated for a week at 2000 C.

Currently pumping down.

 Thursday, April 11, 2019, 13:26

IGP1 = 9.9e-7 Torr

The current is tapped to 40 A

After 1hr the autoramp is set to 1 A/min to TGHT 500 A

The TGHT current remained at 500 A for week

until at April 18 at ~4:30 pm

a localized power outage tripped the EVAP1.

The EVAP1 was ventd with air and the tantalum tube was removed

The tantalum tube did not break.

 Friday, May 24, 2019, 15:04

A TaC coated tantalum tube, loaded with graphite foils was transferred to EVAP1

https://elog.triumf.ca/TIS/Evaporator_2/445

The tueb will be heated with the same power used in EVAP2,

the power of the EVAP2 and EVAP1 will be matched using the fit from Document-126503

The chamber is currently pumping down

 Monday, May 27, 2019, 08:58

The current will be tapped to 50 A to replicate the procedure of EVAP2 

then the current will be set to 1 A/min to 500 A and increased to match with EVAP2 power.

 One of the TBHT bolts  fell out of reach and may be sitting on the isolation valve or TP.

Remove TP as per WP:  I2019-11-05-9

Tuesday, November 05, 2019, 14:48: Completed. Found 2 TBHT bolts, a broken insulator, one small vented screw, and a piece of rubber.

Turbo pump mesh clear. Magnetic grabbing tool left in Evap 1 to potentially pickup /  grab materials before they fall down the hole if needed. The tip of the tool is contaminated.

Tuesday, November 05, 2019, 15:03: Evap 1 pumped down. TP1 started, IV1 opened. Ok. 

Wednesday, January 22, 2020, 18:07

A P2N container  with no heat shields, and no graphite container was installed in the EVAP1

Chamber is currently being evacuated.

 Thursday, January 23, 2020, 09:45

Pressure IGP1=1.87e-6 Torr

Final desired current TGHT = 600 A

Manually tapped to 40 A

 The voltage looks ok, at 32 A the voltage's behavior change (see picture "voltage at 32 A") but is stable

Thursday, January 23, 2020, 13:20

Autoramp is set to 4/30s to 300 A 

The voltage and vacuum were stable so the autoramp was kept at 4/30s and the final current was set to 600 A

At 600 A the voltage was 2.4 V, the current and voltage remained stable for 1 hour (see figures 600A and 600A-zoomed)

Thursday, January 23, 2020, 15:57

The current was ramp down to 0 A  at -5A/20s 

Thursday, January 23, 2020, 16:36 

After 10 min at 0A, the current was ramp up to 600 A at 4A/30s.

At 600 A the voltage was 2.43 V (TGHT)

The container was left at 600 A overnight.

Friday, January 24, 2020, 10:51

The PN2 stayed at 600 A for 15 hrs

The voltage increased 0.1 V during the first 7hr at 600 A and then it stabilized at 2.5 V (see figure "second ramp voltage")

Friday, January 24, 2020, 10:57

The current was ramp down to 0A at -5A/20s  

Tuesday, January 28, 2020, 10:11

A P2N container  with heat shields, and without graphite container was installed in the EVAP1

Chamber is currently being evacuated.

Wednesday, January 29, 2020, 10:12

Pressure IGP1=1.87e-6 Torr

Final desired current TGHT = 600 A

Manually tapped to 40 A.

Voltage increased accordingly in an stable way.

Wednesday, January 29, 2020, 10:33 

Autoramp is set to 3/30s to 300 A 

The voltage and vacuum were stable so the autoramp was kept at 4/30s and the final current was set to 600 A

Accidentally went up to 600 A (1.98 V)!

When updating autoramp to 600 A, did not realize that procedure status was Active.

NOTE: If the procedure status is "active" the heater autoramp, does not "ramp" the current input in "final value", it will go in one step to that current.

The current was manually ramp down to 300 A

TGHT=299.52A, 0.89 V

Wednesday, January 29, 2020, 13:25

After approximately 2 hours conditions IGP1=1.6e-6Torr, TGHT =300 A, 1V.

The current ramp was started again: 4A/30s  to final value of 600 A

 Wednesday, January 29, 2020, 14:07

After 15 min, TGHT=599.424A, and 1.983 V (unstable) (see figure "P2N-test2_final voltage")

The current was ramp down to 0 A  at -5A/20s 

EVAP1 was vented with aair and the container was removed,

the copper shims and legs did not present signs of damage

the body's tantalum sheet had wrinkles inside,

the tantalum foils unfasten a bit, but were adjusted.

Wednesday, January 29 2020, 05:55  

A P2N container  with heat shields, and with a UO2/C loaded graphite container was installed in the EVAP1

Chamber is currently being evacuated.

Thursday, January 30, 2020, 08:56

Pressure limits:

Good vacuum 1e-1 Torr

Bad vacuum 5e-1 Torr

Initial pressure: 

IGP1=1.52e-6Torr

Current ramp set to 1A/min to 10 A, voltage is stable.

Current ramp increased to 1A/10s to 100 A. The pressure started raising around 80 A.

Current was kept 5min at at 100 A, voltage was stable

Thursday, January 30, 2020, 09:32 

Current ramp set to 1A/20s to 150 A (same pressure limits)

Pressure keep increasing during heating

Thursday, January 30, 2020, 09:53 

Current was kept at 150 min during 5 min, the voltage is stable, pressure started to stabilize:

IGP1 = 0.027 Torr

TGHT = 0.418 V

Ramp set to 1A/min to 200 A.

Thursday, January 30, 2020, 10:02

Pressure decreasing:

TGHT= 153 A 

Marla Cervantes wrote:

Wednesday, January 29 2020, 05:55   A P2N container  with heat shields, and with a UO2/C loaded graphite container was installed in the EVAP1 Chamber is currently being evacuated. Thursday, January 30, 2020, 08:56 Pressure limits: Good vacuum 1e-1 Torr Bad vacuum 5e-1 Torr Initial pressure:  IGP1=1.52e-6Torr Current ramp set to 1A/min to 10 A, voltage is stable. Current ramp increased to 1A/10s to 100 A. The pressure started raising around 80 A. Current was kept 5min at at 100 A, voltage was stable Thursday, January 30, 2020, 09:32  Current ramp set to 1A/20s to 150 A (same pressure limits) Pressure keep increasing during heating Thursday, January 30, 2020, 09:53  Current was kept at 150 min during 5 min, the voltage is stable, pressure started to stabilize: IGP1 = 0.027 Torr TGHT = 0.418 V Ramp set to 1A/min to 200 A. Thursday, January 30, 2020, 10:02 Pressure decreasing: TGHT= 153 A

 Thursday, January 30, 2020, 10:15

At 155 A while pressure decreasing, the power supply tripped off,

Controls has been notified, waiting for instructions.

Marla Cervantes wrote:

Marla Cervantes wrote: Wednesday, January 29 2020, 05:55   A P2N container  with heat shields, and with a UO2/C loaded graphite container was installed in the EVAP1 Chamber is currently being evacuated. Thursday, January 30, 2020, 08:56 Pressure limits: Good vacuum 1e-1 Torr Bad vacuum 5e-1 Torr Initial pressure:  IGP1=1.52e-6Torr Current ramp set to 1A/min to 10 A, voltage is stable. Current ramp increased to 1A/10s to 100 A. The pressure started raising around 80 A. Current was kept 5min at at 100 A, voltage was stable Thursday, January 30, 2020, 09:32  Current ramp set to 1A/20s to 150 A (same pressure limits) Pressure keep increasing during heating Thursday, January 30, 2020, 09:53  Current was kept at 150 min during 5 min, the voltage is stable, pressure started to stabilize: IGP1 = 0.027 Torr TGHT = 0.418 V Ramp set to 1A/min to 200 A. Thursday, January 30, 2020, 10:02 Pressure decreasing: TGHT= 153 A   Thursday, January 30, 2020, 10:15 At 155 A while pressure decreasing, the power supply tripped off, Controls has been notified, waiting for instructions.

 Thursday, January 30, 2020, 11:51

Controls respond "It looks like the power supplies were tripped by either the pirani gauge (IEVAP:IGP1) or the Nuclear vent or by both. But, it did not look like that the interlock tree latched the bad condition when the power supplies tripped. I modified the PLC to properly latch the cause of the trip." and gave green light to restart the carbothermal reduction.

Marla Cervantes wrote:

Marla Cervantes wrote: Marla Cervantes wrote: Wednesday, January 29 2020, 05:55   A P2N container  with heat shields, and with a UO2/C loaded graphite container was installed in the EVAP1 Chamber is currently being evacuated. Thursday, January 30, 2020, 08:56 Pressure limits: Good vacuum 1e-1 Torr Bad vacuum 5e-1 Torr Initial pressure:  IGP1=1.52e-6Torr Current ramp set to 1A/min to 10 A, voltage is stable. Current ramp increased to 1A/10s to 100 A. The pressure started raising around 80 A. Current was kept 5min at at 100 A, voltage was stable Thursday, January 30, 2020, 09:32  Current ramp set to 1A/20s to 150 A (same pressure limits) Pressure keep increasing during heating Thursday, January 30, 2020, 09:53  Current was kept at 150 min during 5 min, the voltage is stable, pressure started to stabilize: IGP1 = 0.027 Torr TGHT = 0.418 V Ramp set to 1A/min to 200 A. Thursday, January 30, 2020, 10:02 Pressure decreasing: TGHT= 153 A   Thursday, January 30, 2020, 10:15 At 155 A while pressure decreasing, the power supply tripped off, Controls has been notified, waiting for instructions.    Thursday, January 30, 2020, 11:51 Controls respond "It looks like the power supplies were tripped by either the pirani gauge (IEVAP:IGP1) or the Nuclear vent or by both. But, it did not look like that the interlock tree latched the bad condition when the power supplies tripped. I modified the PLC to properly latch the cause of the trip." and gave green light to restart the carbothermal reduction.

 Thursday, January 30, 2020, 13:09

IGP1=5.9e-6Torr

Ramp set to 1A/10s to 200 A

Pressure rising too fast at 200 A, current reduced manually to 190 A

Pressure start dropping and system tripped, notify to controls again, "The strip tool shows the vacuum level shoot down to 0 then shoot back up for a quick second but that is enough to tell the PLC that IGP is “bad”"

Thursday, January 30, 2020, 15:58 

Restarting process to try to trip the system on purpose 

Initial pressure IGP1 = 2.7e-6Torr

Ramp set to 1/A/10s to 200 A, 0.59 V

Ramp set to 2A/10s to 300 A

Max pressure during process IGP1 = 0.03 Torr

Voltage increased and stabilized (see voltage rising).

Ramp kept at 2A/10s to 400 A

Thursday, January 30, 2020, 16:48 

TGHT = 1.54 V, 399.744 A

IGP1 = 0.00016 Torr and going down

Ramp set to 2A/10s to 500 A

Thursday, January 30, 2020, 17:02 

TGHT= 1.9V, 499.2 A

IGP1 = 0.00014 Torr

Ramp set to 2A/10s to 600 A

Ramp set to 0.5 A/min to 700 A, ramp stopped at 680 A

Manually tapped to 697 A

Pressure dropping indicated that carbothermal reduction is done.

Unfortunately, the system did not trip. 

Contact Gelo for the  next run, such that he can monitor the system and we can spot the problem.