Monday, November 08, 2021, 09:35

Two groups of 4 caps wrapped in graphite with graphite discs in between. 

Two TaC coated springs at either end of the boat.

Target temperature = 1800 C

Expected around 430 TGHT

Good Vacuum 3e-03 Torr

Bad Vacuum 5e-02 Torr

Evap two was left pressuring down over weekend.

Monday, November 08, 2021, 09:35

Starting autoramp to 40 A at 1A/min

TGHT = 2.5e-07 Torr

Monday, November 08, 2021, 10:57

IGP1 = 8.5e -06 Torr and dropping

set autoramp to 50A at 1A/min

IGP1 1.0e-05 Torr and dropping

Set TGHT to autoramp to 90 A @ 1A/min and leave until pressure below 9e-06 Torr

Monday, November 08, 2021, 15:09

IGP1= 9.6e-06 Torr

Start autoramp to 400A at 2A/min 

Monday, November 08, 2021, 17:37

TGHT = 377 A, 6.1V

OMEGA= 1234 C

Monday, November 08, 2021, 17:58

OMEGA = 1292 (cannot trust )

400A, 6.3 V

1.4 e-05 Torr

 Autoramp @ 1A/min to 425A

Will heat to 425A and keep there for four hours

Monday, November 08, 2021, 22:02

TGHT=420A, 6.7V

IGP1= 7.0e-06 Torr

Start ramp down at -2A/min 

Wednesday, February 09, 2022, 06:55 

Target boat with a layer of niobium foil on the bottom used to heat up Nb samples to 1100 C for 4 hrs.

OMEGA slope = 0.99

The niobium samples are wrapped in a layer of  Nb foil.

Boat is wrapped with 2 layers of Nb foil.

Good vacuum 3.00e-02 Torr

Bad vacuum 5.00e-02 Torr

Autoramping TGHT at 3A/min to 180A, then monitor until desired temperature (based on eLog 550)

Initial IGP1=9.9e-07 Torr

Wednesday, February 09, 2022, 08:00

TGHT = 225 A, 3.2V

IGP1=  1.17e-06 Torr

OMEGA= 1100C +/- 12C fluctuations 

Wednesday, February 09, 2022, 11:55

TGHT=  225 A, 3.3 V

IGP1= 9.7e-07 Torr

OMEGA=1100C +/- 10C fluctuations

Wednesday, February 09, 2022, 11:56

Start cooling @-2A/min 

Wednesday, February 09, 2022, 06:55 

Target boat with a layer of niobium foil on the bottom used to heat up Nb samples to 1400 C for 4 hrs.

OMEGA slope = 0.99

The niobium samples are wrapped in a layer of  Nb foil.

Boat is wrapped with 2 layers of Nb foil.

Good vacuum 3.00e-02 Torr

Bad vacuum 5.00e-02 Torr

Autoramping TGHT at 2A/min to 200A, then monitor until desired temperature

Initial IGP1=6.0e-06 Torr

Tuesday, February 15, 2022, 12:44

Increasing ramp up to 3A/min to 220 A as pressure very stable

Tuesday, February 15, 2022, 14:04

ramped up manually to 1400C

IGP1 =3.9 e-06 Torr

TGHT = 340A, 5.5V

OMEGA = 1400 C

Tuesday, February 15, 2022, 14:21

Temperature on OMEGA up to 1413 C

Lowering current to 332A , OMEGA = 1400 +/- 5C

Wednesday, February 16, 2022, 11:43

On Tuesday February15, 2020 @18:04 started ramp down @-3A/min

 Thursday, April 14, 2022, 10:36 Setup, PEEK samples installed on heatshield with TC. Pump down over the weekend.

Sunday, April 17, 2022, 10:37 Vacuum 3e-7T, ramp up TGHT 1A/10s to 500A 

Sunday, April 17, 2022, 12:00 500A reached, waiting 1hour. TC at 42degC. 

Sunday, April 17, 2022, 12:57 after 1h, TC at 45degC. Ramping down 1A/10s. Vacuum 2.7e-6Torr.

Sunday, April 17, 2022, 14:33 ramped down to 0A. Turning off turbo and venting. 

Setup in vacuum over the weekend.

Monday, April 25, 2022, 08:31 IGP1:6.7e-7T . Ramping up 1A/10s to 500A. 

Monday, April 25, 2022, 10:05 500A reached, waiting 1h. TC at 50degC

Monday, April 25, 2022, 10:59 TC at 58degC. Ramping down 1A/10s to 0 A. 

Monday, April 25, 2022, 13:37 TGHT at 0A , venting system. 

Tuesday, June 27, 2022, early afternoon: We assembled the setup in evap2 and started the pumps leaving it running over night.

Tuesday, June 28, 2022, 09:31 Turbo pump stopped for unknown reasons a few hours after we left. Restarting the pump.

Tuesday, June 28, 2022, 10:23 Vacuum down to 1e-5T start to ramp up TGHT 1A/10s to 200A.

Tuesday, June 28, 2022, 1:20 pm, Ramped from 0-500A. thermocouple reading 900C while pyrometer reads 1600C. begin ramping down to 0A.

 11am: Setting up new target tube thermocouple test

Thursday, August 04, 2022, 09:31 Test finished August 3rd afternoon. Venting now.  

1st test polarity 1

10:12 am Begin pumping down to rough vacuum
12:50 pm begin ramping up towards 2000C. Ta tube only, welded thermocouple mount
3:08 Ta tube reached 2000C, began ramping down. The ramping up process was smooth and no hiccups happened
4:57 ramp down complete, began shutting down the evap2, will let the turbopump to slow down spin overnight.

2nd test polarity 2(swapped)

Tuesday, Aug 09 2022, 4pm begin pumping to vacuum after switching the polarity of the power supply

Wednesday, August 10, 2022, 13:09 begin ramping up

3:18 ramped to 671A. 2000C, no hiccups, everything is nominal. The thermocouple reads higher than before, about 20-30 deg C colder than pyro at high temperatures (1400C and above)

No bad connections, short circuits or unexpected overheating.

begin ramping down

ramping down was smooth, with error being the TC about 40 deg C colder than pyro at temp above 1500C

ramping done completed at Wednesday, August 10, 2022, 16:46 , shutting down evap 2 roughing and turbopump

Wednesday, September 14, 2022, 9:30

A Ta container tube was wrapped with 3 Ta heatshields.

322 graphite discs were loaded.

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

A Ta spring was also installed on the back end to maintain the discs inside the tube.

The system was left to establish vacuum over night.

Good vacuum set to5e-03Torr

Bad vacuum was set to 5e-2 Torr

Total weight of system including springs = 249.63 g

Two Ta foils were installed on the copper heatshield facing the ends of the container.

The initial weight of the front Ta foil = 22.5 g

The initial weight of the back Ta foil will be determined by difference after cleaning =

OMEGA slope = 0.99

The target will be heated to 2100 C, held there for 10 hours.  The target will be removed, the end Ta foils will be removed to analyses, new Ta end foils will be installed and the Target will be heated to 2100 plus 10 A higher than previous and left at that temperature for 2 hours.

Wednesday, September 14, 2022, 9:47

IGP1= 4.57e--7 Torr

initial Utoramp at 1A/10s to 80A and held at 80 amps until pressure good.

 Wednesday, September 14, 2022, 11:54

Start autoramp at 1A/20s to 120A

 Wednesday, September 14, 2022, 12:22

Autoramp at 1A/20s to 200A

Wednesday, September 14, 2022, 12:34

Autoramp increased to 2A/20s when TGHT = 154A

Wednesday, September 14, 2022, 13:46

 Autoramping to 512A as projected current for 2100 C

 Wednesday, September 14, 2022, 14:24

OMEGA = 1945 C @ 512A

Tapped to 540A, 10.5V and OMEGA = 2075. Will leave at this current and see Temperature behaeviour.

After 10 min OMEGA reads 2080C.  Will start cooling at 12:20 am

Wednesday, September 14, 2022, 14:29

OMEGA = 2104C will ramp down slightly to keep 2100C

Wednesday, September 14, 2022, 14:31

OMEGA = 2098 @ 530A, 10.4V

Wednesday, September 14, 2022, 14:33

OMEGA = 2100 @ 410A,9.8V

Wednesday, September 14, 2022, 14:45

OMEGA = 2093 at 500A, 9.75V

Wednesday, September 14, 2022, 15:07

497A, 9.6V, OMEGA 2100

Wednesday, September 14, 2022, 22:09

@ approximately 515 pm noticed that OMEGA was reading 1600 C while TGHT was at 497A and 10.0V

Suspect damage to the container and possible damage

Left at the same current.

Just now the OMEGA is reading 2200C at 497A and 9.7V.  Out of precaution, lowered the current to 475A and the volatage is 9.2V

OMEGA now reads 2152 C.  Will leave at this current until 12:30 am when the 10 hour heating will end and will start rampdown at -2A/min

Thursday, September 15, 2022, 00:05

TGHT= 475A, 9.2V

OMEGA= 2126 C

IGP1= 1.33e-6 Torr

lowered current to 470A, 9.1 V, IGP1= 1.3e-6 Torr, OMEGA stabilized at 2120C

Thursday, September 15, 2022, 00:09

IGP1= 1.3e-6 Torr

will increase 10A to see pressure response. OMEGA= 2130C

Increase in IGP1 to 1.4e-6 Torr observed but immediately started to trend down

Thursday, September 15, 2022, 00:16

IGP1= 1.36e-6 Torr

OMEGA = 2131A

TGHT = 480 A

Thursday, September 15, 2022, 00:18

Start ramp down at -2A/min

Thursday, September 15, 2022, 09:45

IGP1=4.35e-07 Torr

TGHT turned off

Starting dismounting of target tube

Thursday, September 22, 2022, 07:04

Container tube was crystalized and was easily cut with a small pair of nail scissors.  All but 18 discs were transferred to a new container.  WO# 44691-3

Thursday, September 22, 2022, 07:13

Each endcap is separated with a disc of graphite foil and rolled into 3 packs of 4 within a foil envelope in a target boat.

There are also 2 coated springs

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

Chamber pumped down over previous night

Good vacuum = 5.0e-04 Torr

bad vacuum = 5.e-02 Torr

OMEGA slope = 0.99

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

Final desired temperature on OMEGA (tap)= 1800C

IGP1= 3.8e-7 Torr

Thursday, September 22, 2022, 10:08

TGHT= 168A,

IGP1= 4.7E-07=6Torr

Increased  ramp to 2A/min

Thursday, September 22, 2022, 12:08

TGHT= 400A, 6.7V

OMEGA= 1604C

Continuing autoramp to 450A @2A/min

Thursday, September 22, 2022, 12:36

TGHT=450A, 7.7V

OMEGA=1700C

Tapping to 1800C manually

Thursday, September 22, 2022, 12:54

OMEGA = 1750C at 505A, 8.8 V 

Tapped to 540A, 9.5V

Will leave there for two more hours

OMEGA= 1800+/- 10 C

Thursday, September 22, 2022, 15:00

TGHT = 540A, 9.3V

OMEGA= 1713

start rampdown at-2A/min
 

Friday, September 23, 2022, 09:49

IGP1= 4.0e-7 Torr

Will dismount container

Saturday, September 24, 2022, 09:10

Endcaps looked good.  The front spring sintered onto container and not usable.  signs of overheating.

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

 Tuesday, October 18, 2022, 13:52

38 pieces of samples made of TiO2/C/PVP loaded into a target boat wrapped with 2 layers of Ta-heat shield.

Samples will be heated to 1700, 1800, 1900, and 2000 C

Some of the pieces will be removed after each target temperature 

Target chamber has been pumping down and the current pressure reading is 6.62e-6 T

 Tuesday, October 18, 2022, 14:12

TGHT will be autoramped to 250 A

Good vacuum: 3e-5 Torr

Bad vacuum: 5e-5 Torr

Omega slope: 0.99

Initiate autoramp: 1 A/min

Hannah Toy wrote:

Tuesday, October 18, 2022, 13:52 38 pieces of samples made of TiO2/C/PVP loaded into a target boat wrapped with 2 layers of Ta-heat shield. Samples will be heated to 1700, 1800, 1900, and 2000 C Some of the pieces will be removed after each target temperature  Target chamber has been pumping down and the current pressure reading is 6.62e-6 T  Tuesday, October 18, 2022, 14:12 TGHT will be autoramped to 250 A Good vacuum: 3e-5 Torr Bad vacuum: 5e-5 Torr Omega slope: 0.99 Initiate autoramp: 1 A/min

 Wednesday, October 19, 2022, 09:42

TGHT has reached to 250A/3.95V, Temp at ~1100 C.  (The archiver is currently not working; already contacted Control to look into it.)

Pressure reached below 4.9 e-7 Torr. 

Auto-ramp to 300 A at 2A/min.  Continue to monitor.

 Wednesday, October 19, 2022, 10:24

TGHT reached to 300 A/4.89V.  Temp at 1206 C. 

Pressure went up slightly and came down after the TGHT setpoint was reached, see attachment#1.

Continue to auto-ramp to 350A at 2A/min.

 Wednesday, October 19, 2022, 11:35

TGHT reached to 350A/5.8V.  Temp at 1360C.

Pressure reached above 1e-6 Torr and came down after TGHT reached the setpoint. 

Continue to auto-ramp to 400 A at 2A/min

 Wednesday, October 19, 2022, 11:57

TGHT reached to 400 A/6.89V.  Temp at 1485C.

Pressure went up to 3.3e-6 Torr and came down after TGHT reached the setpoint,  see attachment#2.

A temp vs current plot has been generated (see shared folder \Hannah\) - est TGHT 480A to reach 1700 (T1).

Auto-ramp to 420 at 1A/min.  Continue to monitor closely...

 Wednesday, October 19, 2022, 13:01

TGHT reached 420A/7.23V, Temp at 1520 C.

Continue auto-ramping to 440A at 1A/min.

 Wednesday, October 19, 2022, 13:42

TGHT reached 440A/7.65V.  Temp at 1572 C

Continue auto-ramping to 460A at 1A/min.

Wednesday, October 19, 2022, 14:10

TGHT reached to 460A/8.10 V.  Temp at 1628 C.

Tapping up TGHT to reach 1700 C

 Wednesday, October 19, 2022, 15:33

TGHT was tapped up to 474A, Temp reached to 1700 C since 14:30.

Pressure is slowing coming down, currently at 1.4 e-6 Torr.

Will hold at this target current for a few hours.

 Wednesday, October 19, 2022, 16:58

Temp went up slightly to 1713 C as the pressure is coming down. 

Lower TGHT to 468A/8.45V to maintain the temp at 1700 C.

 Wednesday, October 19, 2022, 19:55

Temp went up again to 1716 C, but this time the pressure also went up, see attachment#3.  Not sure why the target got hotter... the voltage seems normal and consistent. 

Lower TGHT to 462A/8.44V to maintain at 1700 C. 

Continue monitoring...

 Wednesday, October 19, 2022, 22:56

Temp went up another 10 C, to 1710 C, TGHT is holding at 462 A/8.48V.  Notice the TGHT current readback is fluctuating between 458A - 463 A. 

Initiated cooling.. 2A/min

 Friday, October 21, 2022, 08:55

 All the samples were taken out from the Evap on Thursday Oct 20.  We decided to do so because there was not enough sample in each batch for XRD analysis.  All the sample will be analyzed as treated at 1700 C. 

See attachement #$ for the overall TGHT/Vac plot.

Tuesday, November 01, 2022, 17:24

2 samples of np-TiO2/C fibres were produced using the e-spinner.  Each sample was wrapped with a piece of graphite sheet, and then loaded into a target container. 

Sample will be heated to 1700 C.

TGHT will be autoramped to 450 A; this should be close to 1600 C. (see elog#596)

Good vacuum: 3e-5 Torr

Bad vacuum: 5e-5 Torr

Omega slope: 0.99

Initiate autoramp: 1 A/min

Chamber has been pumped down below 4.2e-6 Torr.

 Tuesday, November 01, 2022, 22:46

 Pressure currently at 6.4e-7 Torr.

Initiated auto-ramping

 Wednesday, November 02, 2022, 09:37

TGHT was ramped up to 448A (readback 445-452A / 8.05V - 8.11V).  The voltage is much higher than the last process, see elog #596.

Temperature is much higher at this current, reading at 1870 - 1872 C. 

Will keep at this setting for now and continue to monitor.

See attachment#1 for the TGHT-Pressure plot.

 Wednesday, November 02, 2022, 21:35

Samples have been heated for over 16 hours; temp has been stabilized at 1875 C, vacuum at 7.3 e-7 Torr. 

Initiated cooling at 1A/min.

Chamber will be vented tomorrow morning.

Monday, November 07, 2022, 14:24

The coated container tube was wrapped in four Ta foil heatshields.

Target temperature on OMEGA= 1850-1900 C

OMEGA slope:= 0.990

Target time at max temperature = 4 hours

Final TGHT current= ~400A (adjustable)

Heating autoramp starged at 4A/min to 40A

Then at 1A/min on both heaters to 120A.

Good vacuum = 5.0 e-02 Torr

Bad vacuum = 5.0E-04 Torr

 IGP1 initial =

Thursday, November 17, 2022, 08:11

The coated container was wrapped in four Ta foil heatshields.

Target temperature on OMEGA= 1850-1900 C

OMEGA slope:= 0.990

Target time at max temperature = 4 hours

Final Current TBHT= N/A

Final TGHT current= ~400A (adjustable)

Heating autoramp starged at 4A/min on  TGHT  40A

Then at 2A/min on both heaters to 120A.

Good vacuum = 5.0 e-02 Torr

Bad vacuum = 5.0E-04 Torr

 IGP1 initial = 2.7e-07 Torr

Thursday, November 17, 2022, 10:41

OMEGA=1897C at 358A, 6.0V

Will ramp down at 230 pm

Thursday, November 17, 2022, 14:34

starting rampdown at -2A/min

OMEGA reads 1865C and IGP1=7.6e-07 Torr

Thursday, November 24, 2022, 11:01

Target container contains one disc of e-spun TiO2/PAN fibrous disc, (Ref sample P-134).

Sample will be heated to 1875C, similar to the previous process, see e-log ID#599.

TGHT will be autoramped to 350 A and monitor the conditions before ramping up further.

Good vacuum: 3e-5 Torr

Bad vacuum: 5e-5 Torr

Omega slope: 0.99

Initiate autoramp: 1 A/min

Chamber has been pumped down below 5.0e-6 Torr.

 Friday, November 25, 2022, 08:38

TGHT reached to 348A/5.8V; temp is holding at 1600 C since 19:00 yesterday, see attachment#1.

Stepping up TGHT to 400A and continue to monitor.

 Friday, November 25, 2022, 09:45

TGHT reached to 400A/6.8V; temp holding at 1758C.  Pressure coming down from 6.6e-7 Torr.

Ramping up to 410A.

 Friday, November 25, 2022, 12:28

TGHT reached 410A/7.08V.  temp holding at 1790 C.  Pressure coming down from 6.9e-7 Torr. 

Ramping up to 430A.

 Friday, November 25, 2022, 13:01

TGHT reached 430A/7.4V. Temp holding at 1837 C.  Pressure coming down from 7.73e-7 Torr.

Ramping up to 440A.

 Friday, November 25, 2022, 13:50

TGHT reached to 440A/7.6V.  Temp holding at 1864C.  Tapping TGHT to 444A (readback 443A - 449 A)/7.7V. 

Desired Temp has reached, 1875 C.  Will continue to hold on this temp over the weekend.

 Sunday, November 27, 2022, 21:14

TGHT has been holding at 442A (lowered by 2 A on Fri to maintain 1875C).  Temp increased to 1887C.  Pressure at 2.5e-7 Torr. 

See attachment#2 for plots/temp. 

Initiated cooling at 1A/min.

Friday, December 02, 2022, 09:46

297 graphite discs packed into a Ta tube wrapped in four heatshields.

Good vacuum 5.0e-04 Torr

Bad vacuum 5.0 e-02 Torr

Will be conditioned @ 2000 C for 5 hours and then for one hour at 10A greater than final current.  Final current will be calculated from

regression.

 IGP1= 5.7 e-07 Torr

ramping to 40A @ 2A/min TGHT

Friday, December 02, 2022, 20:59

Was ramped to 320A but the window must be coated because Temperature readings are drastically off. Will cool down and repeat on Monday after cleaning window.  Will ramp down at -2A/min

OMEGA= 1360 C, expect much higher.

Tuesday, December 06, 2022, 10:58

ramp started at 4A/min .  Initial pressure was 2.6 e-07 Torr

Tuesday, December 06, 2022, 12:45

OMEGA readings low (1290 @ 331A, 5.6V )

Will tap up until pressure bump observed.

Tuesday, December 06, 2022, 13:04

 Pressure bump observed around 440 A, 7.9 V

IGP1= 8.4 e-06 Torr. 

Current stopped and will keep at this current for 10 hours (11 pm rampdown)

Tuesday, December 06, 2022, 13:24

Ramped to 500A, Will leave at 500A for the rest of the conditioning.

Tuesday, December 06, 2022, 23:05

Starting rampdown at -2A/min

IGP1= 4.9e-07 Torr

TGHT= 500A, 9.3V

Wednesday, December 07, 2022, 09:43

Dismounting today.

IGP1 final = 9.6e-08 Torr

Wednesday, December 07, 2022, 13:29

Reinstalled in the evaporator.  Window was not shaded.  Will try heating to 500A once more.

ramp at 6A/min

4 TaC coated springs and 4 Tac coated caps loaded into a target boat.

Target boat wrapped in 4 Ta heatshields

Target boat type was with endcaps at both ends.

Left in Evap2 over previous night to depressurize.

Target temperature= 1850-1900C for 4 hours

Good vacuum = 5e-04 Torr

Bad vacuum = 5e-02 Torr

Friday, December 16, 2022, 10:01

Heated @1A/min to 100A on TGHT

Then heated 2A/min to 120A

Friday, December 16, 2022, 10:08

started autoramp @4A/min  to 300A

Friday, December 16, 2022, 11:15

TGHT=450 A, 7.6 V

OMEGA= 1863 C

IGP1= 7.2e-06 Torr

Will keep for 4 hours

Monday, December 19, 2022, 10:30

Sintering was perfect.  Repeat same configuration next time.

Thursday, February 09, 2023, 09:47

Target boat with a layer of niobium foil on the bottom is used to heat up Nb samples to 1400 C for 4 hrs.

The niobium samples are wrapped in a Nb foil.

Boat is wrapped with 2 layers of Ta foil, careful to avoid touching samples.

Samples left in Evap2 overnight (pumping down).

Good vacuum = 5.0e-04 Torr

Bad vacuum = 5.0e-02 Torr

Thursday, February 09, 2023, 09:48

IGP1= 6.19e-07 Torr

Autoramping to 100A @1A/min

Thursday, February 09, 2023, 09:57

Vacuum stable. ramp at 6A/min to 50 A instead

Thursday, February 09, 2023, 10:09

ramping at 2A/min to 100A

Thursday, February 09, 2023, 11:29

1400C on OMEGA reached @ 341A, 5.5V  Will stop and watch until stable

Thursday, February 09, 2023, 15:29

OMEGA= 1408 C

IGP1= 7.97e-07 Torr

Start rampdown @ -1A/min