Sunday, March 12, 2023, 08:04

Ta HP-SIS was coated with TaC and wrapped with Ta heat-shields (3 layers + 1 inner layer around fins)

Desired temperature = 1850 C , TBHT will be set fixed at 230A (max).

Evap 2 will be pumped down over previous night

OMEGA slope= 0.990

Good vacuum = 5.00 e-4 Torr

Bad vacuum = 5.00 e-2 Torr

IGP1=1.9 e-07 Torr

Start autoramp @2A/min to120 A on TGHT and TBHT.

OMEGA target temp = 1850 C

Sunday, March 12, 2023, 13:08

start autoramp to 500A on TGHT @ 4A/min (2A/30s)

from 320A, 4.5 V on TGHT

IGP1= 6.8e-07 Torr

Sunday, March 12, 2023, 19:09

Starting ramp down @ -2A/min TGHT, and -1A/min TBHT

@687A, 10.7 V TGHT OMEGA = 1850 C

final pressure IGP1= 2.4e-06 Torr

Monday, March 13, 2023, 22:28

Total number of foils:380 ( including 5 analysis discs on the front 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 = 1800 C.  Will ramp to 1820 C

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= 2.8e-06 Torr at start of initial ramp.

Tuesday, March 14, 2023, 07:26  

Increased autoramp to 2A/min to 700 A on TGHT while keeping TBHT to 230A, 3.3V

Tuesday, March 14, 2023, 09:53

At 743A, 11.8V TGHT

OMEGA = 1780 C.  (not entirely reliable, will leave at this current for 4 hours)

Tuesday, March 14, 2023, 14:00

Starting rampdown at -2A/min on TGHT and -1A/min TBHT

Final IGP1= 5.5e-06 Torr

OMEGA= 1750C

TBHT= 230A, 3.3V

Thursday, March 16, 2023, 13:38

The coated container was wrapped in four Ta foil heatshields.

Target temperature on OMEGA= 1860-1900 C

OMEGA slope:= 0.990

Target time at max temperature = 4 hours

Final Current TBHT= 230A

Final TGHT current= ~400A (adjustable)

Good vacuum = 5.0 e-02 Torr

Bad vacuum = 5.0E-04 Torr

 Thursday, March 16, 2023, 22:21

Started ramping TGHT and TBHT @ 1.5A/min to 387 A and 230A respectively.

IGP1 initial = 9.6 e-07 Torr

Cooling projected at 6:48 am tomorrow. 

Friday, March 17, 2023, 06:59

Final IGP1= 1.6e-o6 Torr

Started rampdown @-2A/min TGHT and -1A/min TBHT

Coating looks good uniformely.

OMEGA 1850 C (was 1868 initially)

TGHT was 387A, 6.6 V and TBHT was 230A, 4.1 V

Coating very nice

Tuesday, April 04, 2023, 12:48

Ta HP-FEBIAD was coated with TaC and wrapped with Ta heat-shields (3 layers + 1 inner layer around fins including center fins)

Desired temperature = 1850 C , TBHT will be set fixed at 230A (max).

Evap 2 will be pumped down over previous night

OMEGA slope= 0.990

Good vacuum = 5.00 e-4 Torr

Bad vacuum = 5.00 e-2 Torr

OMEGA target temp = 1850 C

Wednesday, April 05, 2023, 07:37

IGP1= 4.3e-07 Torr

starting autoramp @ 1A/min to 230A on both TGHT and TBHT

Wednesday, April 05, 2023, 10:56

Starting Autoramp at 4A/min to 400 A on TGHT

Wednesday, April 05, 2023, 14:14

OMEGA Reached 1877C  @ 743A, 11.3V TGHT

rampdown  @ 6:00 pm

Wednesday, April 05, 2023, 14:38

Decreased TGHT current to 736A because temperature was creeping up

rampdown was started at 6:05 pm

Final pressure at 0 V - 1.7e-07 Torr

Wednesday, April 12, 2023, 09:53

The coated container was wrapped in 3 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  to 90 A.

Good vacuum = 5.0 e-04 Torr

Bad vacuum = 5.0E-02 Torr

 IGP1 initial = 4.7e-07 Torr

Wednesday, April 12, 2023, 10:46

heating at 2A/min to 90A

Wednesday, April 12, 2023, 11:18

Autoramping at 2A/min to 230A

Wednesday, April 12, 2023, 11:53

Autoramping at 4A/min to 230 A

Wednesday, April 12, 2023, 13:57

Autoramping to 380A

Wednesday, April 12, 2023, 14:07

manually adjusted TGHT to 384A. 6.6 V

OMEGA reads 1859 C.   Leaving for 4 hours. 

Wednesday, April 12, 2023, 18:36

Started rampdown at -2A/min

Sunday, April 16, 2023, 14:08

The coated container was wrapped in four Ta foil heatshields.

Target temperature on OMEGA= 1860-1900 C

OMEGA slope:= 0.990

Target time at max temperature = 4 hours

Final Current TBHT= 230A

Final TGHT current= ~400A (adjustable)

Good vacuum = 5.0 e-04 Torr

Bad vacuum = 5.0E-02 Torr

Ramped at 2A/min to 230 A on both TGHT and TBHT.

Then ramped @4A/min to 385 A on TGHT.  Then ramped manually to 1850 C

Sunday, April 16, 2023, 18:31

At 428A reached 1830C on OMEGA

Sunday, April 16, 2023, 22:24

Start ramp down @ -2A/min TGHT and -1A/min TBHT

Tuesday, April 18, 2023, 06:46

The coated container was wrapped in four Ta foil heatshields.

Target temperature on OMEGA= 1830-1900 C

OMEGA slope:= 0.990

Target time at max temperature = 4 hours

Final Current TBHT= 230A

Final TGHT current= ~400A (adjustable)

Good vacuum = 5.0 e-04 Torr

Bad vacuum = 5.0E-02Torr

Tuesday, April 18, 2023, 06:47

IGP1 initial = 3.80e-07 Torr

Start ramp up at 2A min to 230 on both TBHT and TGHT

Tuesday, April 18, 2023, 09:43

Autoramping TGHT to 380 A @4/min (2/A 30s)

Tuesday, April 18, 2023, 10:36

manually ramped to 416A, 6.8 V on TGHT

TBHT = 230 A, 4.0V

Holding here for 4 hours.

OMEGA = 1863 c

Tuesday, April 18, 2023, 11:26

increased current on TGHT to 418 because temperature had slipped below 1850 C

Tuesday, April 18, 2023, 14:52

ramping down @-2A/min TGHT and -1A/min TBHT

Thursday, April 20, 2023, 06:59

The coated container was wrapped in 3 Ta foil heatshields.

Target temperature on OMEGA= 1830-1900 C

OMEGA slope:= 0.990

Target time at max temperature = 4 hours

Final Current TBHT= 230A

Final TGHT current= ~400A (adjustable)

Good vacuum = 5.0 e-04 Torr

Bad vacuum = 5.0E-02 Torr

Thursday, April 20, 2023, 07:02

Started TBHT and TBHT ramp at 1A/min to 230A

Thursday, April 20, 2023, 09:55

From 170 A started ramping at 2A/min to 230 A on both TGHT and TBHT

Thursday, April 20, 2023, 10:27

Starting ramp on TGHT to 300A, TBHT kept at 230A, 3.0 V

Thursday, April 20, 2023, 11:19

ramping at 4A/min (2A/30s) to 340 A on TGHT

Thursday, April 20, 2023, 11:40

After plot, ramping @ 2A/min to 460A on TGHT expected to reeach at 1245.  4 hours at 4:45 pm

Thursday, April 20, 2023, 13:44

Note that top temperature was 1835C @  480 A, 7.9V

Thursday, April 20, 2023, 17:00

Start rampdown at -2A/min TGHT and -1A/min TBHT

Monday, April 24, 2023, 13:35

The coating is not as good as expected.  Maybe too much time between coating and sintering.  Will not use for TiC target.

Sunday, April 23, 2023, 07:23

The coated container was wrapped in 3 Ta foil heatshields.

Target temperature on OMEGA= 1850-1900 C

OMEGA slope:= 0.990

Target time at max temperature = 4 hours

Final Current TBHT= 230A

Final TGHT current= ~450A (adjustable)

Good vacuum = 5.0 e-04Torr

Bad vacuum = 5.0E-02 Torr

Interlock tripped (HS water flow, SP6, GE, CHIL <--supposed to be bypassed)

 Monday, April 24, 2023, 13:24

In the morning Carla found some loose wires behind EVAP 2. Wires connecting the flow-meter.  The interlock problem was fixed as it was noted there was normal HS water flow.

Started ramp up at 1A/min to 230 A.  The first outgassing bump observed and wil start autoramp @ 2A/min on both TGHT and TBHT (target is 400A on TGHT and 230A on TBHT).

Monday, April 24, 2023, 16:24

Reached 480A on TGHT at 4 pm.  Manually tapped to 500 A on TGHT , OMEGA=1853C.  Will keep until 8 pm.

Monday, April 24, 2023, 19:56

OMEGA= 1853 C

IGP1= 1.5e-06 Torr

TGHT = 500A, 8.5V

TBHT= 230A, 3.1V

rampdown TGHT @-2A/min and TBHT @ -1A/min

Wednesday, April 26, 2023, 09:32

LP FEBIAD loaded with 367 TiC discs and 4 TiC removable discs for analyses

50 packs of 5 and the rest are singles

TaC coated (sintered) springs placed at both ends

Initial total Weight = 521.83 g

Initial heating @ 1A/min to 400 A on TGHT and 280A on TBHT

OMEGA slope = 0.99

Vacuum limits up to 200A:  3.0e-05 Torr -- 5.0e-04 Torr

Vacuum limit up after 200A: 3.0e-05 Torr -- 5.0e-05 Torr

No Ta heat-shields used

Initial IGP1 = 4.1e-07 Torr

Wednesday, April 26, 2023, 09:49

Starting initial ramp up to 200A on both TGHT and TBHT @ 1A/min

Wednesday, April 26, 2023, 12:50

Around 120A on TGHT, the pressure started to slowly drop.  First outgassing done.

Wednesday, April 26, 2023, 14:03

IGP1 = 6.0 e-05 Torr

TGHT = 200 A, 2.7V

TBHT = 200 A, 2.6 v

OMEGA = Below lower limit

Waiting for pressure to fall below 5e0-5 Torr.  Will change bad vacuum to 5.0e-05 Torr and then continue ramping @1A/min to 400 A on TGHT and 280 A on TBHT.

Wednesday, April 26, 2023, 14:13

IGPI= 4.2 e-05 Torr

starting ramping to 400 A on TGHT and 280A on TBHT 

Wednesday, April 26, 2023, 14:26

The IGP1 pressure just fell below 3.0e-05 Torr and ramping has resumed

Wednesday, April 26, 2023, 14:42

pressure hovering around good vacuum so very slow progress.

Wednesday, April 26, 2023, 15:12

TGHT= 223 A, 3.1 V

TBHT = 226 A, 3.0 V

Set ramp rate is 1A/min but real rate is slightly less than 0.5A/min due to pressure fluctuation.

John Wong wrote:

Carla Babcock wrote: Darwin Ortiz Rosales wrote: Wednesday, April 26, 2023, 09:32 LP FEBIAD loaded with 367 TiC discs and 4 TiC removable discs for analyses 50 packs of 5 and the rest are singles TaC coated (sintered) springs placed at both ends Initial total Weight = 521.83 g Initial heating @ 1A/min to 400 A on TGHT and 280A on TBHT OMEGA slope = 0.99 Vacuum limits up to 200A:  3.0e-05 Torr -- 5.0e-04 Torr Vacuum limit up after 200A: 3.0e-05 Torr -- 5.5e-05 Torr No Ta heat-shields used Initial IGP1 = 4.1e-07 Torr Wednesday, April 26, 2023, 09:49 Starting initial ramp up to 200A on both TGHT and TBHT @ 1A/min Wednesday, April 26, 2023, 12:50 Around 120A on TGHT, the pressure started to slowly drop.  First outgassing done. Wednesday, April 26, 2023, 14:03 IGP1 = 6.0 e-05 Torr TGHT = 200 A, 2.7V TBHT = 200 A, 2.6 v OMEGA = Below lower limit Waiting for pressure to fall below 5e0-5 Torr.  Will change bad vacuum to 5.0e-05 Torr and then continue ramping @1A/min to 400 A on TGHT and 280 A on TBHT. Wednesday, April 26, 2023, 14:13 IGPI= 4.2 e-05 Torr starting ramping to 400 A on TGHT and 280A on TBHT  Wednesday, April 26, 2023, 14:26 The IGP1 pressure just fell below 3.0e-05 Torr and ramping has resumed Wednesday, April 26, 2023, 14:42 pressure hovering around good vacuum so very slow progress. Wednesday, April 26, 2023, 15:12 TGHT= 223 A, 3.1 V TBHT = 226 A, 3.0 V Set ramp rate is 1A/min but real rate is slightly less than 0.5A/min due to pressure fluctuation.  Vacuum spike at 300A. Currently: TGHT= 316A, 4.6V TBHT=283A, 3.9V Wednesday, April 26, 2023, 18:18 Ramping TBHT down from 280A to 270A  Wednesday, April 26, 2023, 22:12 TGHT = 400A, 6.1V; TBHT = 274A/3.7V. Temp is holding sturdy ~1100 C and will leave it overnight. Pressure is coming down, currently at 8.8 e-6 Torr.  See attachment for the overview.  TGHT will continue to ramp up tomorrow morning; check the pressure to ensure it has come down below 5e-6 Torr before proceeding.  Refer to the instructions for details.

 Thursday, April 27, 2023, 06:27

IGP1= 1.7e-06 Torr

OMEGA= 1097 C

TGHT= 400A, 6.2V

TBHT= 273A, 3.7 V

Starting ramp up of TGHT @0.2A/min set to 550A

John Wong wrote:

Darwin Ortiz Rosales wrote: John Wong wrote: Carla Babcock wrote: Darwin Ortiz Rosales wrote: Wednesday, April 26, 2023, 09:32 LP FEBIAD loaded with 367 TiC discs and 4 TiC removable discs for analyses 50 packs of 5 and the rest are singles TaC coated (sintered) springs placed at both ends Initial total Weight = 521.83 g Initial heating @ 1A/min to 400 A on TGHT and 280A on TBHT OMEGA slope = 0.99 Vacuum limits up to 200A:  3.0e-05 Torr -- 5.0e-04 Torr Vacuum limit up after 200A: 3.0e-05 Torr -- 5.5e-05 Torr No Ta heat-shields used Initial IGP1 = 4.1e-07 Torr Wednesday, April 26, 2023, 09:49 Starting initial ramp up to 200A on both TGHT and TBHT @ 1A/min Wednesday, April 26, 2023, 12:50 Around 120A on TGHT, the pressure started to slowly drop.  First outgassing done. Wednesday, April 26, 2023, 14:03 IGP1 = 6.0 e-05 Torr TGHT = 200 A, 2.7V TBHT = 200 A, 2.6 v OMEGA = Below lower limit Waiting for pressure to fall below 5e0-5 Torr.  Will change bad vacuum to 5.0e-05 Torr and then continue ramping @1A/min to 400 A on TGHT and 280 A on TBHT. Wednesday, April 26, 2023, 14:13 IGPI= 4.2 e-05 Torr starting ramping to 400 A on TGHT and 280A on TBHT  Wednesday, April 26, 2023, 14:26 The IGP1 pressure just fell below 3.0e-05 Torr and ramping has resumed Wednesday, April 26, 2023, 14:42 pressure hovering around good vacuum so very slow progress. Wednesday, April 26, 2023, 15:12 TGHT= 223 A, 3.1 V TBHT = 226 A, 3.0 V Set ramp rate is 1A/min but real rate is slightly less than 0.5A/min due to pressure fluctuation.  Vacuum spike at 300A. Currently: TGHT= 316A, 4.6V TBHT=283A, 3.9V Wednesday, April 26, 2023, 18:18 Ramping TBHT down from 280A to 270A  Wednesday, April 26, 2023, 22:12 TGHT = 400A, 6.1V; TBHT = 274A/3.7V. Temp is holding sturdy ~1100 C and will leave it overnight. Pressure is coming down, currently at 8.8 e-6 Torr.  See attachment for the overview.  TGHT will continue to ramp up tomorrow morning; check the pressure to ensure it has come down below 5e-6 Torr before proceeding.  Refer to the instructions for details.         Thursday, April 27, 2023, 06:27 IGP1= 1.7e-06 Torr OMEGA= 1097 C TGHT= 400A, 6.2V TBHT= 273A, 3.7 V Starting ramp up of TGHT @0.2A/min set to 550A  Thursday, April 27, 2023, 22:04 TGHT has reached 580A/10.33V. Temp = 1540C.  The two out-gassing peaks were observed: 1st peak around 1300C and 2nd peak 1370C.  See attachments 1 & 2. A few minutes after TGHT reached to 580A, there was a small jump in TGHT current/voltage and also the pressure, but didn't notice any change in the temp, see attachment 3&4.  Pressure is currently at 3.4e-6 Torr; will hold TGHT until pressure reaches close to 1e-6 Torr before cooling down.   Friday, April 28, 2023, 01:06 Pressure has reached 1.8 e-6 Torr; TGHT has been holding at 580A for 3.5 hrs, a slight increase in voltage, reading at 10.45V and temperature, 1548C.  See attachment #5 for overview. Initiating auto-cooling TGHT at -2A/min, TBHT at -1A/min.

 Friday, April 28, 2023, 09:27

IGP1= 1.20e-07 Torr

Will dismount target around 10:15 am

Heating curve below.  Non-linear behavior

 Final weight = 517.08 g

Target looks good see attached picture

Friday, April 28, 2023, 11:29

loaded 14 TaC coated end caps and 2 TaC coated springs.

OMEGA Slope 0.99

Will heat to 1850-1900 C and hold for 4 hours

Good Vac = 5.0e-4 Torr

Bad Vac= 5.0 e-02 Torr

 2 end caps had slight damage and were disposed of.  12 good caps and 2 good springs.

Wednesday, May 24, 2023, 15:22

A Ta container tube was wrapped with 4 Ta heatshields.  Note final container is 45220-11

219 graphite discs were loaded.

a TaC coated Ta spring at the front end.

The system was left to establish vacuum over previous night.

Good vacuum set to5e-04Torr

Bad vacuum was set to 5e-2 Torr

Total weight of system including spring= 250.1 g

OMEGA slope = 0.99

The target will be heated to 2000 C, held there for 10 hours. 

Initial ramp at 1A/min to 200A

Then ramp at 0.5A/min while taking temperature readings periodically unti l250A.

At 250 A will let pressure stabilize and then ramp at 1A/min to 2000C or 450A.  

Will hold at target Temperature or Current for 10 hours before starting ramp-down.

 Wednesday, May 24, 2023, 15:50

Currently heating at 0.5A/min to250A.  Taking temperature/current measurements

IGP1= 1.06e-06 Torr

Wednesday, May 24, 2023, 18:28

heating at 1A/min to 275A to collect more temperature data

Wednesday, May 24, 2023, 19:22

Slight offset between set and RD current observed. 

Ramping at 1A/min to 440A according to the regression below

Should be around 2000 C.

Wednesday, May 24, 2023, 20:22

Currently at 339 A, 4.8V

OMEGA = 1614 C, IGP1= 2.04e-06 Torr

Will ramp up at 2A/min to 450A as new data point suggests

Wednesday, May 24, 2023, 21:05

heating curve has new slope suggesting 500A as minimum to reach 2000 C

Increasing ramp to 1A/10s to reach 450A

Wednesday, May 24, 2023, 21:17

TGHT

IGP1= 3.9e-06 Torr

Continue ramping to 480A

Wednesday, May 24, 2023, 22:11

Offset between setpoint of current and readback.  readback 10A below. 

Will keep at this setting until 7:30 am tomorrow then start ramp down @-2A/min

Thursday, May 25, 2023, 07:25

OMEGA=1912C, IGP1 =1.29e-06 Torr, TGHT = 480A, 9.0V

begin ramp down at -2A/min

Thursday, May 25, 2023, 09:52

Some odd current readback behaeviour noticed.  Have contacted Gelo from controls.  He will look at it next week.  Discrepancy between read back and set point and drop in read back currrent. See picture

Tuesday, June 06, 2023, 09:11

A Ta container tube was wrapped with 4 Ta heatshields.  Note final container is 45220-6

272 graphite discs were loaded.

a TaC coated Ta spring at the front end.

The system was left to establish vacuum over previous night.

Good vacuum set to5e-04Torr

Bad vacuum was set to 5e-2 Torr

Total weight of system including spring= 253.94 g

OMEGA slope = 0.99

The target will be heated to ~2000 C, held there for 10 hours. 

Initial ramp at 1A/min to 200A

Then ramp at 0.5A/min while taking temperature readings periodically unti l250A.

At 250 A will let pressure stabilize and then ramp at 1A/min to 2000C or 480A.  Will use read back current

Will hold at target Temperature or Current for 10 hours before starting ramp-down.

Tuesday, June 06, 2023, 09:14

 Starting ramt at 1A/min

initial IGP1= 8.2e-07

Tuesday, June 06, 2023, 21:25

@480 A on readback, 1823C on OMEGA.  ramping to 510A set point which should be around 490 RD.  (see heating profile for details)

Tuesday, June 06, 2023, 22:02

ramped to 516 on RD 527 on set.  Will leave for 10 hours

OMEGA =1930 C

Wednesday, June 07, 2023, 06:32

OMEGA at 1950 C this morning.  Will continue heating.  Lowered to 1940 C as in experiment 1 this was the top temperature.

Wednesday, June 07, 2023, 07:40

OMEGA= 1940 C

IGP1=1.7-6 Torr

TGHT= 513A, 9.4V

starting ramp down at -2A/min

Thursday, June 08, 2023, 09:28

Using smaller particle size TaC no ball mill procedure.

Loaded 2 TaC coated end caps and 1 TaC coated springs.

OMEGA Slope 0.99

Will heat to 1850-1900 C and hold for 4 hours

Good Vac = 5.0e-4 Torr

Bad Vac= 5.0 e-02 Torr

 Initial IGP1= 4.07E-06 Torr

Thursday, June 08, 2023, 10:36

ramped @ 2A/min to 100A.  Then after pressure stabilized starting ramp at 4A/min (2A/30s) to 400A

Thursday, June 08, 2023, 12:24

reached 1850 C with Set current = 480 and RD current = 470.6A, V = 7.7

Will leave for 4 hours.

Thursday, June 08, 2023, 15:31

ramping down at -2A/min (-1A/30s)

Tuesday, August 15, 2023, 10:48

The coated container was wrapped in 4 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 2A/min(1A/30s) on  TGHT  100A

Then at 4A/min  to 100 A.

Good vacuum = 5.0 e-04 Torr

Bad vacuum = 5.0E-02 Torr

 IGP1 initial =8.9e-06 Torr

 Tuesday, August 15, 2023, 13:00

Tuesday, August 15, 2023, 13:00

Pressure stabilizing @8.8e-06 Torr

starting 2A/30s ramp to 400 A

Tuesday, August 15, 2023, 14:02

TGHT RD CURRENT = 331.4A, 5.8V, SET CURRENT=338 A. 

OMEGA = 1855

IGP1= 1.5e-05 Torr

Leave for 4 hours

Tuesday, August 15, 2023, 15:05

Temperature dropped slightly to 1820C so increased current set point to 345A, and RD was at 338A, 5.9V

OMEGA increased to 1842C

Tuesday, August 15, 2023, 17:59

OMEGA = 1823C

TGHT= RD 338A, 5.9V   SET= 345A

IGP1= 4.0e-06 Torr

Start rampdown at -2A/min

Tuesday, August 22, 2023, 09:29

The coated container was wrapped in 4 Ta foil heatshields.

Target temperature on OMEGA= 1850-1900 C

OMEGA slope:= 0.990

Target time at max temperature = 2 hours

Final Current TBHT= N/A

Final TGHT current= ~400A (adjustable)

Heating autoramp starged at 2A/min(1A/30s) on  TGHT  100A

Then at 4A/min  to =400 A.

Good vacuum = 5.0 e-04 Torr

Bad vacuum = 5.0E-02 Torr

 IGP1 initial =2.2e-06 Torr

 Tuesday, August 22, 2023, 10:25

IGP1= 2.31e-06 Torr

TGHT 98.0 A (RD), 1.35 V

Start ramping at 2A/min to 400A

Tuesday, August 22, 2023, 11:54

Reached 1860 @ TGHT = 353A, 6.16V (RD)  Will leave for 2 hours

Tuesday, August 22, 2023, 14:07

1853C OMEGA

TGHT = 353 A, 6.2 V (RD)

IGP1= 2.88E-06 Torr

Starting ramp-down at -2A/min

Saturday, August 26, 2023, 09:37

Note: the coating looks really good .  The second sintering on the second coating was 2 hours.  Will test the coating during graphite material conditioning.

Saturday, August 26, 2023, 09:39

The coated container was wrapped in 4 Ta foil heatshields.

Target temperature on OMEGA= 1850-1900 C

OMEGA slope:= 0.990

Target time at max temperature = 4 hours

Final Current TBHT= 230 A

Final TGHT current= ~400A (adjustable)

Heating autoramp starged at 2A/min(1A/30s) on  TGHT  100A

Then at 4A/min  to =400 A TGHT and 230A TBHT

Good vacuum = 5.0 e-04 Torr

Bad vacuum = 5.0E-02 Torr

Initial IGP1= 8.7e-07 Torr

Saturday, August 26, 2023, 10:54

IGP1= 1.2e-06 Torr

Start ramp up at 4A/min on both heaters (2A/30s) until TGHT = 400A and TBHT=230A

Saturday, August 26, 2023, 11:32

Paused ramp to allow temperature to stabilize and record data

OMEGA= 1396 C

IGP1= 2.47e-06 Torr

Saturday, August 26, 2023, 11:52

Paused ramp to record data

OMEGA = 1544 C

IGP1=3.4e-06 Torr

Saturday, August 26, 2023, 12:09

Paused ramp to record data

OMEGA = 1653

IGP1 = 4.5e-06 Torr

Saturday, August 26, 2023, 12:33

Omega went up to 1878C.  Lowered the current on TGHT to reach OMEGA = 1857 C

Will keep until 430 pm

IGP1- 3.4e-06 Torr

Saturday, August 26, 2023, 16:10

ramping down at -2A/min tght 1A/min tbht

1837 C OMEGA

Tuesday, August 29, 2023, 12:46

The coated container was wrapped in 4 Ta foil heatshields.

Target temperature on OMEGA= 1850-1900 C

OMEGA slope:= 0.990

Target time at max temperature = 4 hours

Final Current TBHT= 230 A

Final TGHT current= ~400A (adjustable)

Heating autoramp starged at 2A/min(1A/30s) on  TGHT  100A

Then at 4A/min  to =400 A TGHT and 230A TBHT

Good vacuum = 5.0 e-04 Torr

Bad vacuum = 5.0E-02 Torr

Tuesday, August 29, 2023, 12:49

Initial heating start

IGP1= 6.0 e-06 Torr

Tuesday, August 29, 2023, 14:31

Paused ramping to take reading

IGP1= 5.98e-06 Torr

OMEGA = 1500 C

Tuesday, August 29, 2023, 15:24

OMEGA 1866 C

IGP1= 6.6e-6 Torr