Friday, October 20, 2023, 07:20

The coated container was wrapped in 4 Ta foil heatshields.

Vacuum IGP1 initial = 9.9 e-07 Torr

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

Friday, October 20, 2023, 07:24

Starting initial ramp

Vacuum IGP1 initial = 9.9 e-07 Torr

Friday, October 20, 2023, 08:55

After initial pressure bump continued heating at 1A/min to 120A to observe any other possible pressure bump.

Friday, October 20, 2023, 09:05

increased ramp to 4A/min to 400 TGHT and 230 TBHT

Friday, October 20, 2023, 09:35

OMEGA=1280 C

TGHT= 221.5 A, 3.24V 

TBHT=228.9, 3.9V

Friday, October 20, 2023, 10:22

OMEGA 1852 C at TGHT = 390A, 6.5 V ; TBHT = 232 A, 4.0 V

Will leave for 4 hours

Friday, October 20, 2023, 14:16

About to start rampdown

TGHT @ -2A/min

TBHT@ -1A/min

Final OMEGA = 1840 C

IGP1 = 1.83e-06 Torr

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

Friday, January 26, 2024, 07:05

The coated container was wrapped in 4 Ta foil heatshield and left in evap2 over night to attain vacuum.

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= ~700A (adjustable)

Heating autoramp starged at 1A/min on  TGHT  and TBHT to 120A

Then at 2 A/min  to =400 A TGHT and 230A TBHT

Good vacuum = 5.0 e-04 Torr

Bad vacuum = 5.0E-02 Torr

Initial IGP1= 5.7e-05 Torr

Friday, January 26, 2024, 09:20

Pressure starts increasing at 125 A on TGHT and TBHT.  Leaving it to equilibrate then will start ramping at 3A/min (1.5A/30s) to 700A on TGHT and 230A on TBHT

Friday, January 26, 2024, 13:18

leave sintering at 1838C .  Will start rampdown at 5 pm.

IGP1= 6.10e-06 Torr

TGHT=680A, 10.14V

TBHT = 230A, 3.13V

Friday, January 26, 2024, 16:52

IGP1 = 3.0e10-6 Torr

OMEGA=1821 C

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

Thursday, February 23, 2023, 18:20

Ta HP-FEBIAD was coated with TaC and wrapped with Ta heat-shields (3 layers) and 1 under layer that doesn't cover the middle section.

Desired temperature = 1800 C , TBHT will be set fixed at 230A (max).

Evap 2 will be pumped down to 5e-06 Torr range

OMEGA slope= 0.990

Good vacuum = 5.00 e-4 Torr

Bad vacuum = 5.00 e-2 Torr

IGP1=2.5 e-06 Torr

Start autoramp @1A/min to 80 A then autoramp heat @1A/min to 150 A.  Then autoramp TGHT to approx 675A and TBHT to 230A.1

Friday, February 24, 2023, 09:10

heated overnight @0.5 A/min to 400 A.  Then started heating at 1A/min to 600 A while taking readings for current/Temp regression.

regression so far points to 682A to get to 1800C.  Will continue taking readings and possible heat to 1850 C. 

Friday, February 24, 2023, 09:43

autoramping to 690A at 1A/min

Friday, February 24, 2023, 11:24

ramping manually to 690A from 650A

Friday, February 24, 2023, 11:32

4 hours at 330pm

TGHT 492A, 10.6V

TBHT = 230A, 3.2V

IGP1=5.11e-06 Torr

OMEGA =1840 C

Friday, February 24, 2023, 15:36

TGHT = 692A, 10.6V

TBHT = 230 A, 3.2V

OMEGA = 1835 C

IGP1= 2.4e-06 Torr

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

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

Thursday, March 30, 2023, 12:27: 

Ta#65 LP-SIS target description: 

Total Ta foils = 470 [6x20 packs + 350 single discs]

Foil Thickness = 0.033mm (0.0013") avg Measured. 

Target material batch: Ta 2023-1  Mt'l PO# TR-2022-03028

Target density = 18.2685 g/cm3

Target length = 3.40 cm

Total Mass = 62.113 g [Incl foils + Ta wire on 6 packs]

Total mass w/ Target oven= 460.8 g (w/ end caps)

Discs in target are arranged as follows: 1pack / 75 singles / 1pack / 100 singles / 2packs / 100 singles / 1pack / 75 singles / 1pack

Dimpling direction on foils/ Packs.                                                               --> Center <--

End caps installed (Not expanded). No Ta foil heat shield added

Tuesday, May 16, 2023, 10:44: End cap removed post conditioning to remove the rhenium foil. End cap replaced, & weight updated. Length remains the same.

Final desired temperature = 1900C.

Thursday, March 30, 2023, 12:41: RP on. 

Thursday, March 30, 2023, 12:42: Roughing 

Thursday, March 30, 2023, 12:44: OMEGA slope = 0.98. 

Thursday, March 30, 2023, 12:59: TP1 on. 

Thursday, March 30, 2023, 13:00: TP1 off.

Thursday, March 30, 2023, 13:03: Venting. (Steel pair of shields req'd - Install)

Thursday, March 30, 2023, 13:05: Roughing.

Thursday, March 30, 2023, 13:20: TP1 on. 

Thursday, March 30, 2023, 13:29: TP1 trip @ 38 krpm. Quick Reset. Fully "green". OK.

Thursday, March 30, 2023, 13:31: Vacuum @ 5.84e-05T. TGHT / TBHT PS on.

Thursday, March 30, 2023, 13:32: Operation Check. TGHT / TBHT tapped up to 5 / 5 A. Ok. Back to 0A. 

Friday, March 31, 2023, 06:32: Auto-ramping TGHT / TBHT to 500 / 200 A @ 2 A per minute. Vacuum @ 6.52e-07T.

Friday, March 31, 2023, 12:08: TGHT / TBHT @ 500 / 200 A. Vacuum @ 2.24e-06T. Temperature @ 1575 C. Auto-ramping TGHT / TBHT to 580 / 230 A @ 2 A per min

Friday, March 31, 2023, 13:05: TGHT / TBHT @ 580 / 230 A. Vacuum @ 3.69e-06T. Temperature @ 1748 C. Auto-ramping TGHT to 600 @ 2 A per min

Friday, March 31, 2023, 13:27: TGHT / TBHT @ 600 / 230 A. Vacuum @ 3.83e-06T. Temperature @ 1790 C. Auto-ramping TGHT to 620 @ 2 A per min

Friday, March 31, 2023, 13:42: TGHT / TBHT @ 620 / 230 A. Vacuum @ 4.34e-06T. Temperature @ 1820 C. Auto-ramping TGHT to 640 @ 2 A per min    

Friday, March 31, 2023, 13:51: TGHT / TBHT @ 640 / 230 A. Vacuum @ 5.51e-06T. Temperature @ 1858 C. Tap up TGHT to 650 A

Friday, March 31, 2023, 13:54: Vacuum @ 6.03e-06T. Temp @ 1902 C. Tapped up TGHT to 660 manually. Desired temperature reached. 

Friday, March 31, 2023, 13:57: Auto-cooling @ 2 A per minute.

Friday, March 31, 2023, 17:31:

Monday, April 03, 2023, 07:35: PS off. TP off. 

Friday, October 28, 2022, 07:58

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= 230A

Final TGHT current= ~420A (adjustable)

Heating autoramp starged at 4A/min on both TGHT and TBHT 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 = 4.5e-07 Torr

Friday, October 28, 2022, 10:50

after reaching 120A and leaving until pressure drop, autoramp at 2.5A/30s (5A/min) towards 400A TGHT and 230A TBHT.

Friday, October 28, 2022, 11:22

OMEGA= 1890 @ 412A, 7.1 V on TGHT

Leaving for 4 hours

 Ta#66 LP-SIS target description: 

Total Ta foils = 470 [6x20 packs + 350 single discs]

Foil Thickness = 0.033mm (0.0013") avg Measured. 

Target material batch: Ta 2023-1  Mt'l PO# TR-2022-03028

Target density = 12.446 g/cm3

Target length = 5.0 cm

Total Mass = 62.230 g [Incl foils + Ta wire on 6 packs]

Total mass w/ Target oven=  g (w/ end caps)

Discs in target are arranged as follows: 1pack / 75 singles / 1pack / 100 singles / 2packs / 100 singles / 1pack / 75 singles / 1pack

Dimpling direction on foils/ Packs.                                                               --> Center <--

End caps installed (Not expanded). No Ta foil heat shield added

Desired temperature 1900C

Wednesday, September 20, 2023, 14:18: Roughing. 

Wednesday, September 20, 2023, 14:35: TP Started. 

Wednesday, September 20, 2023, 14:43: TP on. 

Wednesday, September 20, 2023, 14:45: TGHT / TBHT raised to 5 / 5 A & lowered. Quick check ok. 

Thursday, September 21, 2023, 07:47: Auto-ramping TGHT / TBHT to 580 / 230 A @ 2 A per min. Vacuum @ 8.30e-07T.

Thursday, September 21, 2023, 09:54: Slope set to 0.98 

Thursday, September 21, 2023, 13:42: TGHT / TBHT @ 580 / 230 A (568 / 233 A). Auto-ramping TGHT to 630 A @ 2 A per min (640 A w/ offset). Temperature @ 1748 C. Vacuum @ 2.47e-06T.

Thursday, September 21, 2023, 14:10: TGHT / TBHT @ 630 / 230 A (618 / 233 A). Auto-ramping TGHT to 650 A @ 2 A per min (640 A w/ offset). Temperature @ 1843 C. Vacuum @ 3.30e-06T.

Thursday, September 21, 2023, 14:23: TGHT / TBHT @ 650 / 230 A (638 / 233 A). Auto-ramping TGHT to 660 A @ 2 A per min (648 A w/ offset). Temperature @ 1879 C. Vacuum @ 3.77e-06T.

Thursday, September 21, 2023, 14:29: Tapped TGHT to 662.  TGHT / TBHT @ 662 / 230 A (649 / 233 A). Temperature @ 1903 C. Vacuum @ 4.08e-06T. Desired Temperature reached.

Thursday, September 21, 2023, 14:33: Auto-cooling started @ 1 A per min.

Monday, September 25, 2023, 08:09: Turbo pump off. 

Monday, November 06, 2023, 09:59

The coated container was wrapped in 4 Ta foil heatshields.

Vacuum IGP1 initial =3.1 e-07 Torr

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 2A/min  to =400 A TGHT and 230A TBHT

Good vacuum = 5.0 e-04 Torr

Bad vacuum = 5.0E-02 Torr

 Monday, November 06, 2023, 14:07

OMEGA =1852 C

IGP1= 3.14e-06 Torr

TGHT= 399A, 6.6V

TBHT= 233A, 4.1V

Tuesday, November 07, 2023, 12:28

Cooled down previous evening and took out today.

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

Ta#(Spare) LP-SIS target description: 

Total Ta foils = 470 [6x20 packs + 350 single discs]

Foil Thickness = 0.033mm (0.0013") avg Measured. 

Target material batch: Ta 2023-1  Mt'l PO# TR-2022-03028

Target density = 12.515 g/cm3

Target length = 4.97 cm

Total Mass = 62.202 g [Incl foils + Ta wire on 6 packs]

Total mass w/ Target oven =  461g (w/ end caps)

Discs in target are arranged as follows: 1pack / 75 singles / 1pack / 100 singles / 2packs / 100 singles / 1pack / 75 singles / 1pack

Dimpling direction on foils/ Packs.                                                               --> Center <--

End caps installed (Not expanded). No Ta foil heat shield added

Was labelled Ta#67 until the Thin foil target 45447-14 became so.

Thursday, October 05, 2023, 12:44: Roughing. 

Thursday, October 05, 2023, 13:10; TP1 on.  

Thursday, October 05, 2023, 13:11: TGHT / TBHT test. Tap up to 5 / 5 A & back to 0 A. Ok.

Thursday, October 05, 2023, 13:13: Slope Set @ 0.98 

Friday, October 06, 2023, 05:54: Auto-ramping TGHT / TBHT to 580 / 230 A @ 2 A per min. 

Friday, October 06, 2023, 11:50: TGHT / TBHT @ 580 / 230 A (568 / 233 A). Auto-ramping TGHT to 630 A @ 2 A per min (640 A w/ offset). Temperature @ 1716 C. Vacuum @ 2.76e-06T.

Friday, October 06, 2023, 12:20: TGHT / TBHT @ 630 / 230 A (618 / 233 A). Auto-ramping TGHT to 650 A @ 2 A per min (640 A w/ offset). Temperature @ 1809 C. Vacuum @ 3.77e-06T.

Friday, October 06, 2023, 12:37: TGHT / TBHT @ 650 / 230 A (638 / 233 A). Auto-ramping TGHT to 665 A @ 2 A per min (650 A w/ offset). Temperature @ 1844 C. 

Friday, October 06, 2023, 12:53: Tapped up to TGHT / TBHT @ 670/ 230 A (657 / 233 A). Temperature @ 1880 C. Vacuum @ 4.94e-06T. 

Friday, October 06, 2023, 12:57: Tapped TGHT to 675.  TGHT / TBHT @ 675 / 230 A (662 / 233 A). Temperature @ 1889 C. Vacuum @ 5.03e-06T. 

Friday, October 06, 2023, 13:00: Tapped TGHT to 682.  TGHT / TBHT @ 682 / 230 A (669 / 233 A). Temperature @ 1901 C. Vacuum @ 5.46e-06T. Desired Temperature reached.

Friday, October 06, 2023, 13:01: Auto-cooling @ 2 A per min.

Tuesday, October 10, 2023, 08:37: PS & TP off. 

Monday, October 17, 2022, 10:03

The coated container was wrapped in 4 Ta foil heatshields. (The 4 shields appear to work well)

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= ~420A (adjustable)

Heating autoramp started at 2A/min on both TGHT and TBHT to40A

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

Good vacuum = 5.0 e-04 Torr

Bad vacuum = 5.0E-02 Torr

Monday, October 17, 2022, 12:45

Autoramping @4A/min on both TGHT and TBHT to 400 and 30A respectively

Monday, October 17, 2022, 12:56

slowed ramp to 2A/min on both heaters as pressure was increasing too fast.  (1A/30s).

Monday, October 17, 2022, 13:30

increased ramp rate to 4A/min on TGHT as TBHT is already at 230A

Monday, October 17, 2022, 14:16

leaving at TGHT : 393A, 6.5V ; TBHT  233A, 4.2V

OMEGA reads 1864C.  Will start rampdown at 6:17 pm

Monday, October 17, 2022, 18:16

OMEGA read 1875C at max and now reads 1856C

starting ramp down at -2A/min TGHT and -1A/min TBHT

Final IGP1= 1.4e-06 Torr

Tuesday, October 18, 2022, 09:37

IGP1= 2.72e-7 Torr

Turning heaters off on epics and turning vacuums off. 

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

Thursday, November 10, 2022, 07:40

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= 230A

Final TGHT current= ~400A (adjustable)

Heating autoramp starged at 4A/min on both TGHT and TBHT 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 = 2.8e-07 Torr

Thursday, November 10, 2022, 10:31

 TGHT 230A 3.4V and TBHT at 230A , 3.9V

Continue ramp up for TGHT at 4A/min (2A/30s) to 380A

Thursday, November 10, 2022, 11:30

OMEGA =1886 C @ 430A, 7.1V TGHT; will leave for 4 hours

Thursday, November 10, 2022, 15:43

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

Tuesday, November 22, 2022, 14:58

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)

Heating autoramp starged at 4A/min on both TGHT and TBHT to 40A

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

Good vacuum = 5.0 e-02 Torr

Bad vacuum = 5.0E-04 Torr

leaving to pressure down. 

 Wednesday, November 22, 2022, 19:10 

OMEGA = 1942 C @ 396A on TGHT

lowered to 386A to 1900 and left for 4 hours.

After four hours, started rampdown at-2A/min TGHT and -1A/min TBHT

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

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

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

Friday, November 18, 2022, 15:08

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)

Heating autoramp starged at 4A/min on both TGHT and TBHT to 40A

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

Good vacuum = 5.0 e-02 Torr

Bad vacuum = 5.0E-04 Torr

leaving to pressure down over weekend

Sunday, November 20, 2022, 12:11

start heatup IGP1=1.63e-07 Torr

Sunday, November 20, 2022, 14:21

OMEGA= 1900 at 395A, 6.6V on TGHT

Will leave until 6;20 pm

Wednesday, March 23, 2022, 10:49

Ta HP-FEBIAD was coated with TaC and wrapped with Ta heat-shields (3.5 layers) (two pieces around the fins only and 3 layers around the whole )

Desired temperature = 1800 C , TBHT will be set fixed at 230A (max).  TGHT expected to reach desired Temperature @~700A

Evap 2 was pumped down over previous night

Good vacuum = 3.00 e-4 Torr

Bad vacuum = 5.00 e-2 Torr

IGP1= 1.2 e-06 Torr

Start autoramp @0.5 A/min to 60 A

 Wednesday, March 23, 2022, 11:37

Increase autoramp to 1A/min to 60A for both TGHT and TBHT

Wednesday, March 23, 2022, 12:24

Pressure increasing at 60A so will leave at this current until pressure drops

Wednesday, March 23, 2022, 13:32

IGP1 = 2.9e-06 Torr

Will autoramp at 0.5A/min to 90A both TGHT and TBHT

Thursday, March 24, 2022, 16:35

1800C reached at 724A TGHT .  TBHT @ 230A.  Will keep at this temperature for 4 hours. 

Thursday, March 24, 2022, 20:20

 IGP1 = 6.9 e-06 Torr

OMEGA= 1828 C

TGHT = 724 A, 11.6 V

TBHT = 232.8 A, 3.1 V

Will start ramp-down at 2035 @ -2A/min TGHT and -1A/min TBHT