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

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. 

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

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

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

Thursday, March 09, 2023, 06:53

2 TaC coated springs and  12 Tac coated caps loaded into a target boat (in packs of 4 wrapped in graphite foil).

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

Start autoramp at 2A/min to 50A on  TGHT

 Thursday, March 09, 2023, 07:22

at 44A switched ramping rate to 1A/min to 120 A

Thursday, March 09, 2023, 09:53

ramping at 4A/min (2A/30s) to 400A

IGP1= 9.9e-07 Torr

Thursday, March 09, 2023, 11:26

1130 am  reaching 425A on TGHT 

1850 C OMEGA

Thursday, March 09, 2023, 15:37

TGHT 425 A, 7.1V

OMEGA = 1850 C

Starting rampdown @ -2A/min

endcaps and spring looked really good.

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)

Saturday, March 04, 2023, 08:29

Ta LP-FEBIAD with 369 discs plus 5 removable discs wrapped with 3 Ta heat-shields (in layers)

Evap 2 will be pumped down over previous night

Desired temperature = 1500 C as in Elog #52 , TGHT will be ramped up to 300 A and then adjusted manually to 1500C if temperature readings are ok

otherwise will use plot from coating sintering to approximate 1500C.

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

Good vacuum = 5.00 e-4 Torr

Bad vacuum = 5.00 e-2 Torr

IGP1= 3.4 e-07 Torr

Start autoramp @2A/min to 80 A then autoramp heat @1A/min to 230 A (both TGHT and TBHT)

  Then autoramp TGHT to 300 A

-

Saturday, March 04, 2023, 22:27

At 332 A, 5.6V on TGHT, 230 A, 3.3 V TBHT

OMEGA = 1370 C

Will autoramp to 375A on TGHT @0.25A/min then leave for 4 hours at 1500C

Cooling should start at 6 am march 5th

OMEGA reading 1498 @ 2 am

Sunday, March 05, 2023, 06:03

OMEGA reading 1442 C @550am

ramped up to 394 A on TGHT and OMEGA reads 1500 C

will leave for 40 minutes than test ramp up to observe outgassing

d until 715 am then begin rampdown.

Sunday, March 05, 2023, 07:22

ramped to 425 to test further outgassing temperature increase observed but only while increasing current.

OMEGA = 1590 C

TGHT= 425A, 7.6V

TBHT= 230A, 3.3V

IGP1=2.0e-06 Torr

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

Wednesday, March 01, 2023, 21:46

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= 5.7 e-07 Torr

Start autoramp @1A/min to 500 A on TGHT and 230A TBHT. 

Thursday, March 02, 2023, 10:10

ramping to 600A on TGHT @ 2A/30s, TBHT at 230A, 3.2V

Thursday, March 02, 2023, 11:22

At 11 am reached 1800s C and 1851C @1120 am. 

TGHT = 690 A, 10.5V

TBHT = 230 A, 3.3V

Cool down to start at 3 pm

Tuesday, February 28, 2023, 07:19

Ta LP-FEBIAD was coated with TaC and wrapped with Ta heat-shields (4 layers)

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= 1.2 e-06 Torr

Start autoramp @1A/min to 80 A then autoramp heat @1A/min to 150 A.  Then autoramp TGHT to 400 A and TBHT to 230A.1

Tuesday, February 28, 2023, 15:39

Will ramp to 426A to 1850C as per regression line. 

Tuesday, February 28, 2023, 15:57

Will start cooling at 8 pm

OMEGA= 1858 C

IGP1= 2.12e-06 Torr

TGHT =426 A, 7.5 V

TBHT = 230 A, 3.2 V

Tuesday, February 28, 2023, 19:58

OMEGA = 1858 C

IGP1 = 1.04e-06 Torr

TGHT =426 A, 7.6 V

TBHT = 230 A, 3.2 V

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

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, 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

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.

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

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.

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, 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

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 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

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 =