Wednesday, July 17, 2019, 10:57

Annealing of five RRR Nb samples following cold-working and resistance measurements.  Used to validate computational annealing model developed for SRF studies.  For more information contact Norman Muller, x6398.

Desired temperature 1025 C.

Five Nb samples wrapped with Nb foil were set on a tantalum boat (coated with TaC)

the tantalum boat was wrapped with two tantalum sheets.

The boat was installed in the EVAP2.

The initial vacuum was IGP1 = 1.26e-6 Torr.

Ramping rate 5 A/min to final current of 200 A.

Wednesday, July 17, 2019, 11:18 

At 155 A, the ramping rate was changed to 1 A/min 

Wednesday, July 17, 2019, 11:28 

The ramping was stopped at 167 A.

 Wednesday, July 17, 2019, 11:57

Conditions:

IGP1 = 1.65e-6 Torr

TGHT = 2.54 V, 174.46 A

Temperature ~ 950 C

Wednesday, July 17, 2019, 18:07

IGP1 = 1.16 e-6

TGHT = 3.18 V, 206.7 A

Temperature ~950 C

Cooling ramp 10 A/min 

 Vented with air

Suggestion for future annealing:

  Use tantalum boat without TaC coating.

 Tuesday, May 10, 2022, 14:42: TV551 Varian. SN: 202311 (Slightly active from BL1A - will not cross contaminate. Field only - Tagged) was removed as it was meant to be a temporary fix. Replacement (Refurbished) pump is to be installed. (Tomorrow - Use slow start function as per vacuum group) 

Thursday, May 12, 2022, 13:30: Agilent TP & hardware installed.

SN: IT21381010 

Thursday, May 12, 2022, 13:41: Roughing.

Thursday, May 12, 2022, 13:46: Halt. 

Friday, May 13, 2022, 07:05: Roughing. 

Friday, May 13, 2022, 07:18: TP1 on.

Friday, May 13, 2022, 07:23: Up to 14 KRPM. Pause/Halted startup (Whining?). Slow start w/ vacuum group.

Process to perform a TP slow start:

- Hold both top buttons on the controller for about 3 seconds

- Right Yes/No left to continue. 

- Advance to soft start - 20 min. 

- Back to remote start & go.

Friday, May 13, 2022, 08:26: TP1 on w/ slow start.

Friday, May 13, 2022, 08:39: 13 KRPM & climbing.

Friday, May 13, 2022, 09:10: TP at full speed. 38 KRPM. 0.5A 9w. This pump whines, but is operating fine. Likely will switch again when another is available. (It appears to have been dropped, Noted by Edi. Likely when shipped) 

Friday, May 13, 2022, 09:14: TP off. Slow start function off. Back to normal function. 

Thursday, April 04, 2024, 12:06

Ta container tube, wrapped in 4 Ta foil heat-shields, and loaded with _________ D shaped discs in a 12mm graphite cartridge with usable 11mm

conditioning tube WO = 44692-13 (4th conditioning with this tube)

End-caps on the graphite cartridge have holes for outgassing.  One spring each end in the Ta container

initial heating @ 2A/min to 85 A then 2A/min to 120A TGHT

OMEGA slope = 0.99

Vacuum limits up to 400A: 5.0e-04 Torr -- 1.0e-02 Torr

Mas current~400A (1900 C)

Friday, April 05, 2024, 09:04  

Ramping to 85A done and pressure trending down.  Will continue ramp to 120A

Friday, April 05, 2024, 16:01

Starting rampdown at -2A/min

IGP1= 3.2e-06 Torr

Wednesday, April 03, 2024, 06:46

Ta container tube, wrapped in 4 Ta foil heat-shields, and loaded with _________ D shaped discs in a 12mm graphite cartridge with usable 11mm

conditioning tube WO = 44692-13

End-caps on the graphite cartridge have holes for outgassing.  One spring each end in the Ta container

initial heating @ 2A/min to 85 A then 2A/min to 120A TGHT

OMEGA slope = 0.99

Vacuum limits up to 400A: 5.0e-04 Torr -- 1.0e-02 Torr

Wednesday, April 03, 2024, 06:49

initial IGP1= 1.28e-06 Torr

Wednesday, April 03, 2024, 09:26

IGP1= 2.3e-05 Torr

TGHT = 78 A, 1.3V

Will continue ramp as planned.

Wednesday, April 03, 2024, 11:37

Ramping at 2A./min to 400A

Wednesday, April 03, 2024, 14:01

expected 1900C at 401A

leaving at 402A for 4 hours.  Rampdown start at 4:10 pm at -2A/min

Thursday, February 29, 2024, 07:40

Ta container tube, wrapped in 4 Ta foil heat-shields, and loaded with _________ D shaped discs in a 12mm graphite cartridge with usable 11mm

conditioning tube WO = 44692-13

End-caps on the graphite cartridge have holes for outgassing.  One spring each end in the Ta container

initial heating @ 2A/min to 85 A then 2A/min to 120A TGHT

OMEGA slope = 0.99

Vacuum limits up to 400A: 5.0e-04 Torr -- 1.0e-02 Torr

Thursday, February 29, 2024, 07:43

Initial IGP1=  9.31e-7 Torr

Thursday, February 29, 2024, 17:43

Temperature profile suggests 1900 C at 400A.  Now at 400A.  Will keep at this current for 4 hours.

manually ramped the last few amps.

TGHT= 400A, 7.3 V OMEGA = 1901C

Thursday, February 29, 2024, 22:20

IGP1=2.1e-6 Torr

started ramping down at -2A/min

Wednesday, February 21, 2024, 06:22

Ta container tube, wrapped in 4 Ta foil heat-shields, and loaded with 201 D shaped discs in a 12mm graphite cartridge with usable 11mm

conditioning tube WO = 44692-13

End-caps on the graphite cartridge have holes for outgassing.  One spring each end in the Ta container

initial heating @ 2A/min to 90 A then 1A/min to 120A TGHT

OMEGA slope = 0.99

Vacuum limits up to 400A: 5.0e-04 Torr -- 1.0e-02 Torr

Wednesday, February 21, 2024, 09:12

IGP1 initial = 9e-07 Torr

Starte at 3A/min to 90A

Wednesday, February 21, 2024, 09:21

increased autoramp to 4 A/min until pressure starts rising, then will slow down or pause

Wednesday, February 21, 2024, 09:32

At 74A, paused.  Will continue at 2A/min TGHT

Wednesday, February 21, 2024, 09:40

Pausing at 87A. 

Wednesday, February 21, 2024, 10:34

pressure dropping.  restarting ramp up to 120A at 2A/min

Wednesday, February 21, 2024, 10:37

From previous TiC 220206, will heat up fast until 250A and then at 1A/min until 300A to better resolve out-gassing profile

Wednesday, February 21, 2024, 12:05

Changed ramp to 1A/min to 300A

Wednesday, February 21, 2024, 13:10

Manually ramped up for a while

increased ramp speed to 2A/min

regression line started to match previous one after 1300C

Wednesday, February 21, 2024, 13:16

increased ramp rate to 4A/min to 420A

Wednesday, February 21, 2024, 13:37

Note: the temperature became unrealistic.  suspect window condensate.  Will use regression and to to 441A

Wednesday, February 21, 2024, 13:54

reached 441A, 7.6V

leaving for 3.5 hours or when pressure drops to 2-3 e-06 Torr

Wednesday, February 21, 2024, 18:56

IGP1=2.9e-06 Torr

starting rampdown at -2A/min

Wednesday, February 07, 2024, 22:36

Ta container tube TaC coated, wrapped in 4 Ta foil heat-shields, and loaded with 320 D shaped discs in a 12mm graphite cartridge with usable 11mm

Endcaps on the graphite cartridge have holes for outgassing

initial heating @ 2A/min to 90 A then 1A/min to 120A TGHT

OMEGA slope = 0.99

Vacuum limits up to 400A: 5.0e-04 Torr -- 1.0e-02 Torr

Thursday, February 08, 2024, 06:18

Starting heat ramp tght

initial pressure = 8.1e-07 Torr IGP1

Thursday, February 08, 2024, 06:54

start of gasoff observed. paused ramp and will continue at 1A/min

Thursday, February 08, 2024, 07:24

lowered TGHT current to 75 A as pressure increasing too rapidly.  will leave at this current until pressure drops

Thursday, February 08, 2024, 09:11

continuing ramp to 120A on TGHT

Thursday, February 08, 2024, 09:24

Increasing ramp to 2A/min to 250A on TGHT

Thursday, February 08, 2024, 10:52

Increased ramp to 3A/min to 250A on TGHT

Thursday, February 08, 2024, 11:10

Everything looks good will continue to 300 A at 3A/min TGHT

Thursday, February 08, 2024, 11:33

Pausing heating at 285A, 4.8V TGHT

OMEGA reads 1430C

Will let pressure drop and then proceed ramping slowly @ 0.2A/min

Thursday, February 08, 2024, 13:53

IGP1= 2.4e-06 Torr

OMEGA = 1432 C

ramp at 0.2A/min towards 1550C

Thursday, February 08, 2024, 14:07

pressure very stable.  will increase to 0.4 A/min

Thursday, February 08, 2024, 15:24

increasing ramp rate to 1A/min

IGP1 = 2.5e-06 Torr

Thursday, February 08, 2024, 18:05

1900 C on OMEGA

will leave 3-4 hours depending on pressure

Thursday, February 08, 2024, 21:10

No additional pressure peaks observed and pressure on IGP1=  1.9e-06 Torr

TGHT= 460 A, 8.1V

OMEGA= 1860 C

ramp down at -2A/min

Thursday, December 14, 2023, 09:53

Target left pumping down in Evap2 overnight. 

Initial weight including protective jig = 1474.3 g

Total number of target foils:388 

 10 analysis discs: 5x 220727-2 labelled as A and 5x 231123-2 labelled as B on the right side (front) of container.  Order of discs ABABABABAB.

Total length packed 15.5 cm

container has 3 Ta heat shields including the inner made of three pieces as to cover the center block.

No endcaps inserted to facilitate out-gassing

Ta coated spring at  both ends

ramp to 500A @ 1A/min TGHT and to 230A on TBHT

max approx 700A on TGHT and 230A on TBHT (Omega slope set = 0.990)

Then temperature = 1800C

TBHT will be set fixed at 230 A (max).  TBHT heated manually and automatically to max.

Good vac at 5.00 e -4 Torr

Bad vac at 5.00 e-2 Torr

 IGP1= 9.3e-07 Torr at start of initial ramp.

Thursday, December 14, 2023, 09:56

Started initial ramp up 1A/min on both heaters

Thursday, December 14, 2023, 11:03

Pressure dropping.  Will increase ramp speed to 2A/min on both heaters (1A/30s)

Thursday, December 14, 2023, 11:17

pressure dropping.  Increase ramp to 4A/min (2A/30s)

Will stop and ramping for temperature measurements

Thursday, December 14, 2023, 13:28

Increased ramp to 5A/min (2.5A/30s)

 Will heat to 703A on TGHT and leave for 4 hours

Wednesday, December 06, 2023, 09:47

Target number of foils:370

Analysis discs 16 A and 16B interspersed on the end further from the laser

A are discs produced using new method and B are discs produced using milling.

Total length packed 16 cm (excluding the analysis discs)

container has 3 Ta heat shields (one inner around fins and center block, new type of 1st shield made up of three pieces)

No endcaps inserted to facilitate out-gassing

Ta coated spring at  front end

ramp to 120A @ 1A/min TGHT and to 120A on TBHT hold there until pressure drop, then ramp to 500A on TGHT and 230A TBHT.

max approx 700A on TGHT and 230A on TBHT (Omega slope set = 0.990)

Then temperature = 1800C

TBHT will be set fixed at 230 A (max).  TBHT heated manually and automatically to max.

Good vac at 5.00 e -4 Torr

Bad vac at 5.00 e-2 Torr

 IGP1= 1e-06 Torr at start of initial ramp.

Wednesday, December 06, 2023, 09:56

System left to drop pressure over previous night and now at 120A.  waiting for pressure drop.

Wednesday, December 06, 2023, 11:18

increased ramp rate to 2A/min

Wednesday, December 06, 2023, 14:41

increased ramp to 3A/min on TGHT and stopping to allow pressure to stabilize before taking temperature readings

Top temperature 1800C at 710 A but started dropping.  Increased current to 750A and left there for 4 hours.

Cool down at -2A/min TGHT and -1A/min TBHT

Monday, March 06, 2023, 21:29

Total number of foils:382 ( including 5 analysis discs on the right side of the container)

Total length packed 17 cm (excluding 5 analysis discs that will be removed)

container has 4 Ta heat shields (one inner only around fins)

No endcaps inserted to facilitate out-gassing

Ta coated spring at  both ends

ramp to 500A @ 1A/min TGHT and to 230A on TBHT

max approx 700A on TGHT and 230A on TBHT (Omega slope set = 0.990)

Then temperature = 1800C

TBHT will be set fixed at 230 A (max).  TBHT heated manually and automatically to max.

Good vac at 5.00 e -4 Torr

Bad vac at 5.00 e-2 Torr

 IGP1= 3e-06 Torr at start of initial ramp.

Tuesday, March 07, 2023, 07:23

IGP1= 1.2e-05 Torr

OMEGA = 1288 C

Tuesday, March 07, 2023, 10:01

Will ramp to 715 A and keep there for 4 hours.  OMEGA readings not reliable beyond this point due to coating on EVAP2 window.

Tuesday, March 07, 2023, 11:10

TGHT = 715A, 11.0V

TBHT = 230A, 3.2V

OMEGA = 1750 C (but not reliable)

Maintaining for 4 hours then will ramp down @ -2A/min TGHT and -1A/min TBHT

Wednesday, March 08, 2023, 07:27

Final IGP1= 1.3e-07 Torr (before shutting down pumps)

Thursday, September 29, 2022, 09:57

A Ta container tube was wrapped with 3 Ta heatshields.

338 graphite discs were loaded.

one Tantalum cup (modified to fit losely) was inserted on the front end along with a Ta spring.

on the backside there is no spring but four discs glued together with PVA

The system was left to establish vacuum over night.

Good vacuum set to5e-04Torr

Bad vacuum was set to 5e-2 Torr

Total weight of system including springs = 249.07 g

OMEGA slope = 0.99

The target will be heated to 2100 C, held there for 10 hours.  The target Temperature vs Power will be tabulated and the current required to reach 2100 will  be extrapolated to avoid using OMEGA at higher temperatures.

a)  The target will be removed, weighed and inspected

b) If the target boat is still good, run again at 10A higher than previous for 2 hours.

c) The target will be removed, weighed and inspected

d) i) If the weight is the same or negligible, experiment ends

  ii) if the weight has decreased and target still intact, repeat from step b and document all measurements and settings

 Thursday, September 29, 2022, 10:04

IGP1= 1.4e-04 Torr

TGHT= 80.0 A, 1.0V

Will allow pressure to drop and then continue heating

Thursday, September 29, 2022, 10:20

IGP1= 7.9e-05 Torr pressure on downward trend

Start heating at 2A/min to 200A

The target started dropping in temperature as current increased.  Suspected OMEGA issue.

Started cooling at -2A/min

Will continue next week.

Monday, October 03, 2022, 11:05

Upon inspection, the window though which the OMEGA laser travels was coated with dark precipitate (mostly a spot in the direct path of the laser).

Cleaned the window and started pumpdown.

Monday, October 03, 2022, 12:57

start heating @2A/20s = 6A/min because the target had previously been heated past additive evaporation point.

IGP1= 3.8e-06 Torr

Monday, October 03, 2022, 18:41

Will heat to 500A and leave for 10 hours.  The regression shows too high current to reach 2100.  Not reasonable.  So will work with 500A as a baseline.

Tuesday, October 04, 2022, 06:52

Temperature @500 A read 1742C

maintained for 10 hours

start rampdown at -2A/min 

OMEGA currently 1099C

Current = 500 A

Voltage =9.9 V

IGP1= 5.9e-7 Torr

Tuesday, October 04, 2022, 21:32

Quartz window was completely covered with graphite like dust.  final weight after heating = 244.57 g (a couple of discs came loose and they were weighed separately and not included in the next heating).

weighted target and added one extra heatshield because it looked like a lot of heat was escaping.  Will treat at 500A again for 2 hours.  The extra heat-shield should provide hotter environment.

new initial weight = 254.24 g (don't have a balance with greater precision .

Wednesday, October 05, 2022, 07:42

IGP1= 3.8e-07 Torr

ramping to 280A @ 3A/min

Wednesday, October 05, 2022, 11:40

ramping to 350 @ 3A/min

Then ramp to 500A

500A at 12:50

Wednesday, October 05, 2022, 15:52

ramping down at -2A/min

Thursday, October 06, 2022, 09:27

IGP1= 1.8e-07 Torr

Will dismount and weigh, then decide how to proceed

according to second regression, second heating was ~2000 C.  OMEGA not reliable after 1700 C in this case. 

Thursday, October 06, 2022, 12:34

The final weight after the second heating was = 254.19 g

reinstalled target and cleaned quartz window. 

will heat up to 510 A

Friday, October 07, 2022, 07:46

IGP1=  3.0 e-07 Torr

ramp at 2A/min to 500A.  will pause to take data points for regression.

Friday, October 07, 2022, 13:05

Start rampdown after two hours at 500A, 10.3V

-2A/min

Thursday, July 12, 2012, 17:29

NiO was sprayed on Ni foil.

Average/discs: mass= 0.075g, thickness=0.076mm, density = 7.023g/cm3.

4 set of samples were loaded onto the targetboat (coated/sintered with TaC).  A piece of Ta foil was used as the under layer (see attachment #1).

A 0.002" thick Ta foil was wrapped around the container as the heat-shield.

The chamber was pumped down to 5.0e-6 Torr before the cooling water valve was opened; no leaks was detected.

For this process, the target heater will only go up to 250A (~1100C), with auto-ramping rate at 0.5A/min.

The heater has been stepped up to 50A, local 32A/ 0.23V.  The vacuum reached to max 1.6e-5 Torr, and it's coming down.

Thursday, July 12, 2012, 17:51

Auto-ramping initiated...

 Friday, July 13, 2012, 09:42

TGHT reached to 250A and stayed for 6 hrs (see attachment #2).  At that current, the target wasn't glowing so the temperature could not be measured. 

Initiated auto-cooling at 2A/min. 

Friday, July 13, 2012, 11:00  

TGHT reached to 65A.  Stopped the auto-cooling process and manually tapped down the p/s to 0A.  

Vacuum is stable at 5.7e-7 Torr.  

In the next 30 min or so, the chamber will be vented and the NiO target material will be taken out for inspection. 

Saturday, February 13, 2021, 08:10

Ta boat loaded with 80 discs enclosed in graphite foil in pockets of 20.  Sample A at both ends and sample B in the middle spaced out. Boat wrapped in Ta heat-shields (3 layers).

(A B B A)

Desired temperature= 1800C (expected TGHT approx 410 A).

good vacuum = 3.00 e-05 Torr

bad vacuum = 5.00 e-05 Torr

Evap2 left to pump down over previous night.

IGP1= 5.4e-7 Torr and stable

Initiating TGHT ramp up at 1 A/ min to 30 A

Saturday, February 13, 2021, 12:19

IGP1= 6.9e-06 Torr

Ramp to 50 A 1A/min

Saturday, February 13, 2021, 14:35

IGP1 = 6.4e-6 Torr

Pressure trending down. 

Saturday, February 13, 2021, 14:56

IGP1= 4.9 e-6 Torr

Initiate Ramp up @ 1 A/min to 400 A

Changed ramp up to 0.5 A/min at around 11:30 pm

Sunday, February 14, 2021, 11:43

The current will be ramped up to 420 A according to the trendline approximation (see attachement 1)

Sunday, February 14, 2021, 12:26

IGP1 = 8.9 e-06 Torr and trending down

TGHT = 420 A, 7.5 V

OMEGA = 1730 C

Will ramp up to 428 A manually 

Sunday, February 14, 2021, 12:30

Reached 428 A on TGHT.  

OMEGA = 1760 C

Will bump to 430 A and hold for 4 hours

OMEGA= 1765 C

Sunday, February 14, 2021, 18:00

OMEGA = 1789 C

IGP1= 7.5 e -7 Torr

TGHT = 430.5 A , 7.8 V

Start ramping down at -1A/min to zero A

Friday, March 13, 2020, 13:52

Total number of foils: 493

Total length packed 17.4 cm

container has 3 Ta heat shields.

No endcaps inserted to facilitate out-gassing

Two TaC coated Ta wire springs inserted at both ends.

Initially to ramp TGHT and TBHT to 50A at 1A/min

Then heat manually to OMEGA ~1400 C , ramping TGHT manually and automatically  to reach 530A A (Omega slope set = 0.990)

Then temperature = 1800 (C using slope 1.08 at after 1700C manually and automatically ramp to 700A then  TGHT will be tapped up accordingly to reach desired Temp).

TBHT will be set fixed at 230 A (max).  TBHT heated manually and automatically to max.

Good vac at 3.00 e -5 Torr

Bad vac at 5.00 e-5 Torr

Evaluation discs not included because no space.

Total Green disc mass measured = 58.78 g

Friday, March 13, 2020, 14:22

Container loaded and pressuring down started without any pump issues.

Friday, March 13, 2020, 23:26

IGP1= 9.1e-07 Torr

Start auto tap at .25A/min to 50A on both TBHT and TGHT

Saturday, March 14, 2020, 07:09

IGP1=6.9e-6 Torr

TGHT = 49.1 A, 0.58V

TBHT = 49.2A, .49V

Continue ramp to 80 A on both heaters at .0.25A/min (good vacuum 3.0 e-04 Torr, bad vaccum 5.0 e-04 Torr

Saturday, March 14, 2020, 08:22

IGP1=6.8 e-05 Torr

Pressure spike TGHT =63.7 A, 0.77 V; TBHT = 60.0 A , 0.62 V

Aborted ramp alow to stabilize (Tapped TBHT to 63.8 A

Saturday, March 14, 2020, 12:16

IGP1= 8.1e-05 Torr

start autoramp at 0.25A/min

Saturday, March 14, 2020, 17:47

IGP1= 2.9e-05 Torr

TGHT= 78.4A, 1.0 V

TBHT = 79.4A, .88 V

manual and automatic  tap up to 740A TGHT and 230A TBHT then tap manually to 1800 C (mostly at .075 A/min and increasing to 1A /min as pressure stabilizes)

Sunday, March 15, 2020, 22:40

OMEGA = 1711 C

TGHT = 784,6 A, 12.9V (readback)

TBHT = 232 A, 3.5 V

Tap TGHT to 800 A readback set to 815A

Sunday, March 15, 2020, 23:20

OMEGA =1801 C

TGHT = 799.2 A, 13.3 V, TBHT = 232.9, 3.6V

Start gradual tap-down as temperature rising (1810 C at end of this note)

Sunday, March 15, 2020, 23:49

OMEGAA = 1818 C

TGHT = 769.9A, 12.6 V; TBHT = 232.9 A, 3.6 V

Temperature dropping tapped back up to 799 A on TGHT read back (set to 815 A)

Monday, March 16, 2020, 04:10

OMEGA = 1395 C (not reliable)

TGHT = 799.2 A, 13.2 V

TBHT = 232.9 A, 3.6 V

IGP1 = 2.2 e-06 Torr

Initiate cooling at -1.5 A/min on TGHT to 600A (at 600 A increase cooling rate to 3 A/min ; at 300 A increase cooling to 4 A/min and start TBHT cooling at 1 A/min; at `200 A on TGHT increase cooling to 4 A/min and TBHT 2 A/min)

Monday, March 16, 2020, 09:43

TGHT = 0 A , 0.02V

TBHT = 53,2 A, .56 V  (increase cooling to 4 A/min)

IGP1= 1.12e-07 Torr

Monday, March 16, 2020, 10:37

IGP1= 9.5 e -8 Torr

TGHT and TBHT = 0A, 0V

Will unload container

Monday, March 16, 2020, 12:40

Ten discs removed for evaluation (6 from left side and 4 from right side)

two graphite discs placed at each end as well as two TaC coated and sintered end-caps

total length after sintering = 17.8 cm

Rick mentioned to me that the evaporator is ready for the next steps of the commissioning process.
In the chamber only the target leg heaters have current by-pass clamps on them. 
The ionizer tube heaters do not have them because these lines do not have the same configuration as the others. The current by-pass clamps will 
not fit these lines.

We may not need this for the commissioning, Rick will design and manufacture something  for this when I get back from holiday.

The water is on in all circuits except for the power supply cooling circuit.

Pierre

Thursday, February 21, 2019, 09:01

Container coated with TaC and wrapped with 2 Ta heat shields.

Desired temperature= 1900 C, Omega Slope set = 0.990, Auto TGHT at 0.2A/min to reach 400A, TGHT will be tapped up accordingly to reach desired Temp.

TBHT will be set fixed at 230 A (max). 

Good vac at 3.00e -5 Torr

Bad vac at 5.00e-5 Torr

Chamber pump down was started on Wednesday February 20th; however, this morning IEVAP2:TP1 and IEVAP2:BV1 were found in the OFF position.

There are no abnormal sounds from the roughing pump.

IGP1= 5.6e-2 Torr

Will turn on IEVAP2:BV1 and IEVAP:TP1 from the hot lab and listen for anything out of the ordinary.

 Friday, February 22, 2019, 09:56

Pumped down to IGP1=2.1 e-07

Will tap up TGHT and TBHTmanually and monitor the pressure.

Friday, February 22, 2019, 11:20

Manually tapped up TGHT (V~ 0.90) and TBHT(V ~0.99) to 90A

maximum pressure reached ~7.4e-06 Torr and trended down

Friday, February 22, 2019, 11:25

Initiating Autoramp @ 0.2 A/min for TGHT to reach 450A and TBHT to reach 230A

Estimated temperature for TGHT ~1200 C
 

 Friday, February 22, 2019, 15:42

TGHT @ 145 A and TBHT @ 138A

Changed Autoramp to 0.1 A/min  so that it will take over the weekend to reach 450A and 230A for TGHT and TBHT respectively.

Monday, February 25, 2019, 08:29

IGP1=1.1e-07 Torr, TGHT= 451.4 A, 6.7 V, TBHT = 233.1 A, 3.1 V

Omega T = 1197 C

Will manually tap up by increasing TGHT current by ~1A/min monitoring pressure.   Will allow system to stabilize ~1400 C.

 Monday, February 25, 2019, 11:14

 Trend forcast 1400 C at TGHT= 566.75 A (Line plot attached)

Actual but not stable ~1445-1452 C at 566 A

Will continue to manually increase current monitoring pressure

 Monday, February 25, 2019, 12:33

Omega T= 1679 C , TGHT = 657.7A, 10.52 V, TBHT = 233.2 A, 3.2 V

IGP1 = 1.4e-05 Torr slightly trending up.

Autoramp @ 1 A/min to a maximum of TGHT 780 A. 

Monday, February 25, 2019, 14:43

IGP1= 3.7e-06 Torr trending down slightly, TGHT = 780.3 A, 12.9 V

Omega T = 1931 C

Monday, February 25, 2019, 15:14

manually tap up to TGHT to 790 A

Monday, February 25, 2019, 15:36

IGP1= 2.9e-6 Torr trending down

TGHT = 784.3 A, 13.01 V

TGHT current set to 790 A

Omega T = 1940 C

Will leave over-night

 Tuesday, February 26, 2019, 08:23

IGP1= 7.85e-07 Torr Stable

TGHT = 784.32 A, 12.54 V

TBHT = 233.3 A, 3.2 V

OMEGA T = 1948 C

Initiating Auto-cool ramp at 2.0A/min and 1.0A/min for TGHT and TBHT respectively.

Wednesday, February 27, 2019, 08:10

IGP1 = 3.3 e-08 Torr Stable

TGHT = 0A, 0.05V

TBHT = 0.02A, 0. V

Will begin vacuum release

Monday, November 04, 2019, 14:19 

Each endcap is separated with a disc of graphite foil and rolled into packs one pack of 4 and one pack of 8 within a foil envelope in a target boat.

There are also 3 coated springs interspersed.

The boat is wrapped with 3-layers of Ta heatshields.

Chamber pumped down overnight.

OMEGA slope = 0.99

Will Tap TGHT up to 40 A then autoramp to 400A at 1A/min.

Final desired temperature on OMEGA (tap)= 1800C

 Tuesday, November 05, 2019, 11:30

IGP1 = 9.6e-7 Torr

Autoramp TGHT to 40A at 1A/min

Tuesday, November 05, 2019, 11:44

IGP1= 2.6e-06 Torr

TGHT = 40.8 A, 0.37V

Will leave at 40 A for 1 hour

 Tuesday, November 05, 2019, 12:39

 IGP1=2.5e-6 Torr

TGHT =40.0A, .33V

Start ramping TGHT to 400A at 0.1A/min

Wednesday, November 06, 2019, 09:32

IGP1=7.8e-7 Torr

TGHT = 168.4A, 2.38V

increase ramp speed to 1A/min

 Wednesday, November 06, 2019, 14:07

IGP1= 2.34e-6 Torr

TGHT=400.0 A, 6.98V

set TGHT autoramp to 460A @ 1A/min aiming for 1850C (see attached plot)

Wednesday, November 06, 2019, 15:18

OMEGA = 1776 C

TGHT = 460.0A, 8.52V

IGP1= 4.7e-6 Torr

Starting manual tap up to 1810C

Wednesday, November 06, 2019, 15:36

OMEGA=1810 C

TGHT = 468.8A, 8.74V

IGP1=4.14e-6

Wednesday, November 06, 2019, 19:04

OMEGA=1822 C (has been between 1817-1824 C over 3.5 hours )

TGHT=468.8A, 8.67V

IGP1=1.9498e-06 Torr

Start TGHT ramp down at -2A/min

Thursday, November 07, 2019, 09:55

THGT = 0A, 0V overnight

IGP1= 3.2 e-07 Torr

Proceeding with unloading.

End caps looked good for online use.

 Thursday, June 11, 2020, 09:56

Previous day (Wednesday June 10, 2020) 

Container coated with TaC and wrapped with 3 Ta heat shields.

Desired temperature= 1900 C, Omega Slope set = 0.990, Auto TGHT at 0.2A/min to reach 400A, TGHT will be tapped up accordingly to reach desired Temp.

TBHT will be set fixed at 230 A (max).

Good vac at 3.00e -5 Torr

Bad vac at 5.00e-5 Torr

Chamber pump down

Thursday, June 11, 2020, 10:19

IEVAP2:IGP1=1.06e-6 Torr

ramping to 40A (TGHT and TBHT) at 1A/min

Thursday, June 11, 2020, 12:35

IEVAP2:IGP1=1.8e-6 Torr

TGHT = 39.8 A, 0.45V

TBHT=38.5 A, 0.48V

Manually rampted to 45A on both TGHT and TBHT 

Thursday, June 11, 2020, 12:58

IEVAP2:IGP1=1.6e-6 Torr

TGHT = 34.8 A, 0.52V

TBHT=44.2A, 0.55V 

Start Autoramp at .5A/min to 400A on TGHT and 230A on TBHT

Thursday, June 11, 2020, 17:14

Irregular pressure profile.  Cooling .  Need to check for leak.

TGHT = 99 A 1.3 V

TBHT = 99 A 1.4 V

Friday, June 12, 2020, 12:59

Restarting ramping

IGP1= 4.98e7 Torr

Autoramp at 1A/min to 400A on TGHT and 230A on TBHT

(pressure and TGHT current and voltage profile seem normal compared to previous coating sintering with the same power supply)

Friday, June 12, 2020, 14:40

Paused ramping

TGHT = 90A

After a few minutes the profile (noise) was still there.  Continue autoramp at 0.5A/min to 400 A on TGHT and 230A on TBHT

Friday, June 12, 2020, 15:21

IGP1= 1.97e-06 Torr trending down

TGHT = 111.5 A , 1.5 V

TBHT = 112.9 A, 1.9 V

Increase ramping speed to 1A/min to 400A on TGHT and 230A on TBHT

Friday, June 12, 2020, 20:50

OMEGA = 1754 C

IGP1= 2.5e-6 Torr

TGHT = 394.1 A, 6.6 V

TBHT = 232.8 A, 4.0 V 

Tapping to 1900 C

Friday, June 12, 2020, 21:00

OMEGA =1901 C

IGP1= 5.6e-6 Torr

TGHT = 448.3 A, 7.5 V

TBHT = 232.8 A, 4.1 V

Saturday, June 13, 2020, 00:51 

 OMEGA = 1898 C

IGP1 = 2.0e-6 Torr

TGHT = 447.2 A, 7.5 V

TBHT = 232.9 A, 4.1 V

Start cooling at -2A/ min for TGHT and -1A/min for TBHT

Thursday, February 10, 2022, 08:52 

Total number of foils: 528 ( including 10 analysis discs)

Weight without springs = 1521.9 g (includes heatshields and T bar)

Total length packed 18.1 cm (including 10 analysis discs that will be removed)

container has 3 Ta heat shields.

No endcaps inserted to facilitate out-gassing

Ta coated spring at  ends

Initially to ramp TGHT and TBHT to 50A at0.5 A/min

Then heat automatically heat to OMEGA ~1400 C , then continue to max 530A on TGHT and 230A on TBHT (Omega slope set = 0.990)

Then temperature = 1800C

TBHT will be set fixed at 230 A (max).  TBHT heated manually and automatically to max.

Good vac at 3.00 e -4 Torr

Bad vac at 5.00 e-2 Torr

 IGP1= 1.0 e-06 Torr at start of initial ramp

IGP1 = 5.7 e-06 Torr

TGHT = 50.0 A, 0.6 V

TBHT = 50.0A, 0.5 V

continue to ramp up at 0.5A/min to 200A

Friday, February 11, 2022, 07:59 

IGP1=3.0e-07 Torr and stable

TGHT= 201A, 2.8V

TBHT = 201A, 2.6V

continue autoramp at 1A/min to 230A on TBHT and 450A on TGHT

Friday, February 11, 2022, 12:41

IGP1= 6.6e-05 Torr

TGHT= 450A, 6.5V

TBHT= 232A, 3.1V

OMEGA = 1258C

Allowing pressure to drop.  Will continue ramp up when [pressure around 9-e-6 Torr

Friday, February 11, 2022, 13:59

IGP1= 2.4e-05 Torr

Will ramp up at 1A/min to 550A on TGHT

Friday, February 11, 2022, 15:54  

IGP1= 2.4e-05 Torr

TGHT= 551.0A, 8.3V

TBHT=232A, 3.2V

OMEGA= 1426 C

ramp to 600 A @ 2A/min

Friday, February 11, 2022, 16:23

TGHT= 600.1A, 9.3V

TBHT= 232A, 3.2V

OMEGA = 1612C

ramp to 689 @2A/min to 1800 C as projected in regression plot attached 

Friday, February 11, 2022, 21:20 

Evap has been at 1800 +/- 20 C for 4 hours and 10 minutes

OMEGA 1802 C

TGHT = 689 A, 11.0V

TBHT=232.8 A, 3.26V

IGP1= 1.3e-05 Torr and stabilizing.  

will start cool down at -2A/min TGHT and -1A/min TBHT