2021-07-21 4:44pm Vacumm at 1e-5Torr. Water cooling leak check ok.

 2021-07-21 4:54pm ramping up TGHT to 200A 1A/10s.

2021-07-21 5:31pm 200A TGHT, TC 94degC pyro 1100degC. TC very low, ramping down and venting.

2021-07-22 5:00pm Parasitic prototype target installed, Vacuum 3e-5T, leak check ok. Power on HE of parasitic target.

2021-07-22 5:14pm vacuum 2e-5T. Ramping up container to 100A , 1A/10s.

2021-07-22 5:33pm vacuum 1e-5T. All good at 100A. Ramping up container to 200A , 1A/10s.

2021-07-22 5:54pm vacuum 8.2e-6T. All good at 200A pyro at 1100degC. Ramping up container to 300A , 1A/10s.

2021-07-22 6:15pm vacuum 7.6e-6T. All good at 300A pyro at 1420degC. Ramping up container to 400A , 1A/10s.

2021-07-22 6:36pm vacuum 8e-6T. All good at 400A pyro at 1700degC. Ramping up container to 500A , 1A/10s.

2021-07-22 6:57pm vacuum 1e-5T. All good at 500A pyro at 1960degC. Ramping up container to 553A , 1A/10s.

2021-07-22 7:13pm vacuum 1e-5T. All good at 553A pyro at 2100degC.

2021-07-22 7:36pm Ramping down 1A/10s.

2021-07-23 10:00am Venting.

 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.  

 Friday, November 22, 2019, 18:18:

Friday, November 22, 2019, 18:18: Roughing

Friday, November 22, 2019, 18:23: Turbo on .

Friday, November 22, 2019, 18:32: Turbo at speed 

Friday, January 18, 2019, 15:00

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

Desired temp = 1900 C, Omega slope set = 0.990, Auto ramping TGHT at 1A/min to reach 400A, TGHT will be tapped up accordingly to reach desired Temp.

TBHT will be set fixed at 230A (max). TBHT at 1A/min to reach 230A.

Good vac at 3.00-5 Torr

Bad vac at 5.0e-5 Torr.

Chamber is currently being pumped down.  Sintering will proceed next week.

 Monday, January 21, 2019, 10:17

Current pressure at IGP1 = 1.31e-7 Torr

Manual tapping to 50A on TBHT and TGHT

TBHT 38.75A, 0.41V

TGHT 37.5A, 0.07V

waiting for pressure to stabilize.

pressure  IGP1 8.0 e-7 Torr

Auto ramping TGHT at 1A/min to reach 400A, and TBHT at 1A/min to reach 230A.

 Tuesday, January 22, 2019, 09:34

TGHT reached 400A , 1800 C, however temperature dropped to 1785 C.

TGHT increased to 444A manually.  Temperature stabilized at 1880 C.  

After 10 hours, TGHT was ramped down @ 2A/min and TBHT @1A/min

Tuesday, January 22, 2019, 14:36: Evap 2 PS off. Turbo off (Around 14:10) Vented Evap 2 and removed the target container with Darwin. - AS.  

Thursday, February 07, 2019, 14:12

Tantalum tube coated with TaC and wrapped with 3 layers of Ta heat-shielding.

Desired temperature= 1900 Celsius (expected TGHT ~445A/7.5V)

EVAP2 Currently pumped down, heating will be initiated tomorrow.

Friday, February 08, 2019, 08:46

Current pressure IGP1 = 3.46e-07 Torr

Manual tapping to 50A on TGHT

TGHT 47.43A, 0.26V

Waiting for pressure to stabilize.

Pressure was going down so current was increased manually to 65 A to induce the outgassing.

TGHT 73.9A, 0.67V

MAx pressure IGP1 = 4.41e-6 Torr

After approx 1 hour

TGHT = 0.70 V  74.1 A

IGP1 = 1.63 e-6 Torr

Autoramp was set to 2 A/min for final current of 350 A

 Friday, February 08, 2019, 13:43

Autoramp TGHT reached 350 A /5.47 V, current temperature at 1660 Celsius

IGP1 = 3.0e-06 Torr/coming down

Increase TGHT to 400 A autoramp at 2A/min

 Friday, February 08, 2019, 14:39

TGHT reached 413 A, 6.8 V, pressure at 1.9 e-06 Torr coming down

Continue to tap up TGHT to reach 1900 C

Friday, February 08, 2019, 14:56

TGHT manually increased to 428 A, 7.18V, pressure at 2.0e-06 Torr coming down slowly

Temperature at 1903 C

Will continue to heat at ~1900 C for four hours before cooling down

 Friday, February 08, 2019, 21:00

TGHT 7.21 V, 429.75 A, 1873 C

IGP1 6.77e-7 Torr

The heater ramp is set to -2 A/min to 0 A.

 Wednesday, February 13, 2019, 10:04

A previously coated tantalum tube with 3 layers of shielding (Details in e-log 426) was loaded with a graphite insert. 

The tube was loaded in evaporator 2 and pumped down

The graphite insert will be heated to 2000 C for 1 week

IGP1=1.37e-07 Torr

 Wednesday, February 13, 2019, 10:27

IGP1= 1.46e-07 Torr

Manual tapping to 40A on TGHT

TGHT 40.7A, 0.104V

Autoramp started at 1A/min up to 400 A

Good Vacuum = 3.00e-05, Bad Vacuum = 5.00e-05

 Thursday, February 14, 2019, 08:42

IGP1= 2.2e-07 Torr, T=1705 C, TGHT 401A, 6.7 V

Manually tapping to 2000 C (Slow ~1 A/min) in 5 A increments followed by waiting for equillibrium

Thursday, February 14, 2019, 10:54

IGP1 = 1.4e-06 Torr, T = 2003 C, TGHT 500A, 9.1 V

Waiting for equillibrium

manually tapped TGHT to 503A,  T = 2003 C

Will leave for 1 week

Wednesday, February 20, 2019, 08:44

 IGP1= 1.37e-07 Torr, T=1943 C, THGT= 503 A, 8.9 V

Ramp-down @ 2A/min

Wednesday, February 20, 2019, 14:02  

1 hour since TGHT = 0 A

Venting will proceed.

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

Thursday, March 07, 2019, 09:09

Transfer tube from Legnaro was coated with TaC.

The transfer tube was set in a tantalum boat and wrapped with 3 heat shields,

the legs of the transfer tube were let out of the shielding sheets.

Chamber pump down was started on Wednesday March 06, 2019.

Desired temperature TGHT = 1800 C, Omega slope set = 0.990.

IGP1= 4.48e-07 Torr

Will tap up TGHT manually to 40-50 A and monitor pressure.

 Thursday, March 07, 2019, 10:57

The TGHT current was left at 40 A for 50 min, the pressure achieved was 6.15e-7 Torr

The TGHT was rised to 45 A 11:00 am the pressure rised to 6.18e-7 Torr (11:10am)

The TGHT was rised to 50 A 11:10 am the pressure rised to 6.81e-7 Torr (11:32am)

auto ramp was set to 1 A/min to 300 A

Good vacuum 3e-5 Torr

Bad vaccum 5e-5 Torr

auto ramp was set to 1 A/min to 400 A

auto ramp was set to 1 A/min to 470 A

Final conditions TGHT = 485 A, 8.25V Temperature = 1800 C

The transfer tube stayed at 1800 C for 4 hours

auto ramp was set to -1 A/min to 0 A. 

Friday, March 08, 2019, 16:53 

EVAP2 was vented with air and the transfer tube was unloaded

Monday, March 18, 2019, 15:51

Total number of foils: 555

Total mass of material including graphite foils: 478 grams

Total length packed 14.2 cm

container has 3 Ta heat shields.

No endcaps inserted to facilitate outgassing

Two TaC coated Ta wire springs inserted at either end to allow for ZrC expansion.

5 extra foils tucked beneath each spring for QC; total mass (10 discs) =1.0160 g

Desired temp = 1900 C, Auto ramping TGHT at  0.1 A/min to reach 280A A (Omega slope set = 0.990, approx 1400 C, Elog#427),  TGHT will be tapped up accordingly to reach desired temperature. 

TBHT will be set fixed at 230A (max). TBHT at 0.1 A/min to reach 230A.

Good vac at 3.00-5 Torr

Bad vac at 5.0e-5 Torr.

Currently being pumped down.

 Tuesday, March 19, 2019, 08:57

Current pressure IGP1 = 5.24e-07 Torr

Manually tapping to 40A on TBHT and TGHT

At 20 A IGP1 pressure trending up.  Will leave at 20A until trending down.

Pressure @ 20 A set, peaked ~1.8e-06 Torr after 1 hour

Tuesday, March 19, 2019, 10:32

Tapping manually to 50 A on TBHT and TGHT while monitoring IGP1 pressure

Tapped to 25 A and IGP1 pressure trending up.  Will allow to stabilize.

Tuesday, March 19, 2019, 11:34

Pressure stabilized at ~3.25e-06 Torr

Tapped up to 30 A on both TGHT and TBHT

Pressure stabilized at ~6.6e-06

Tapped up to 34A on both TGHT and TBHT

Pressure stabilized at ~1.2e-05 Will allow to drop before proceeding

 Tuesday, March 19, 2019, 13:43

Tapped up to 40A waiting for pressure to stabilize

Pressure shot up ~8.5e-05, therefore tapped down TGHT to 35A (At 35A TGHT current value fluctuates, probably better to ramp up to 36A)

Will let pressure drop before proceeding with TGHT heating

Ramped TGHT to 36A, IGP1 pressure still trending down and current measurements stable.

 Starting autoramp at 0.3A/min for both TGHT and TBHT until 280A and 230A respectively

Initial TGHT Current: 33.6A, 0.05V

Initial TBHT Current: 38.6A, 0.48V

IGP1 = 4.9e-05 Torr

Wednesday, March 20, 2019, 09:41

 TGHT has only ramped to 45.7 A, 0.085V

TBHT has only ramped to 50.2A, 0.62V

IGPI pressure ~4.0 e-5 Torr

Stopping ramp and monitoring pressure to see if it drops appropriate levels.

Wednesday, March 20, 2019, 14:10  

IGP1 pressure = 7.6e-06 Torr

TGHT 47.7Z, 0.16V

TBHT 50.1A, 0.63V

Autoramp at 0.1A/min both TGHT and TBHT to 280A and 230A respectively.

 Thursday, March 21, 2019, 08:12

IGP1 = 3.1e-05 Torr

TGHT = 51.4 A, 0.18V

TBHT=61.9A, 0.87V

Stopped autoramp

Manually ramping TGHT and TBHT while monitoring pressure

 Rampted up TGHT to 54A (reading 65 A), 0.5V and TBHT to 68A, 0.9V

Allowing pressure to stabilize

Manually tapped TGHT to 80A, .81V

Manually tapped TBHT to 90A, 1.3V

IGP1 = .0002 Torr

Will leave over night to allow pressure to drop

Friday, March 22, 2019, 08:17

IGP1 = 6.6e-06

TGHT = 88.8A, 0.81V

TBHT = 90.1A, 1.3V

Will manually tap ~100A on both TBHT and TGHT

Friday, March 22, 2019, 12:18

IGP1 = 1.28e-05 Torr

TGHT = 100.9A, 1.0V

TBHT = 101.2A, 1.5V

will allow pressure to drop slightly the autoramp at 0.1A/min for both TGHT and TBHT until 280A and 230A respectively

Friday, March 22, 2019, 14:51

IGP1= 7.4 e-06 Torr

TGHT = 100.8A, 1.0V

TBHT= 101.5A, 1.5V

Started autoramp at 0.1A/min for both TGHT and TBHT until 280A and 230A respectively

Tuesday, March 26, 2019, 08:18

IGP1 oscillated around ramping trip point 3.0e-05 while current slowly ramped to 280A (reached sometime during the night).

IGP1= 7.8e-06 Torr

TGHT= 283.4A, 4.2V

TBHT= 233.1A, 4.1V

Will continue ramp TGHT @0.2A/min up to 400A  (Omega slope set = 0.990, approx 1800 C, Elog#427)

Wednesday, March 27, 2019, 09:39

Target has been at 400A, OMEGA ~1400C since ~7pm of previous evening

TGHT = 400.2A, 6.45V

TBHT= 233.1A, 4.16V

IGP1= 3.1e-07 Torr

Autoramp TGHT to440A @0.2A/min

 Stopped autoramp at TGHT = 427.4 A and 7.00V, OMEGA= 1492 C

Wednesday, March 27, 2019, 14:14

Restarted TGHT autoramp @.2A/min up to 440A

Friday, March 29, 2019, 12:06

Changed OMEGA slope to 1.09 after checking with the analog pyrometer

IGP1 = 1.65e-07 Torr

TGHT = 441.3A, 7.5V

TBHT= 233.0A, 4.2V

Tapping TGHT to 450A @ ~1A/min while monitoring pressure

TGHT remained at 451A, 7.8 V  and  TBHT at 233.2A, 4.2 V,  for 10.5 hours while OMEGA Temperature ~1810 C.

Ramp-down was initiated with IGP1 = 1.7e-07 Torr

Ramp rate = 2A/min for TGHT and 1/min for TBHT

 Monday, April 01, 2019, 08:53

TGHT = 0A, 0.05V

TBHT= 0.01A, 0V

IGP1= 4.05e-08 Torr

Unloading Target

Target Final weight = 473 g

% Mass of ZrC+C+organics lost = 14.20 % compared to 13.95% theoretical organics content.

Final weight of 10 discs = 0.9250 g

% mass lost on this discs = 13.66%

The tube was slightly bent along the short axis

The discs expanded but more towards one side (possibly due to discrepancy in spring strength).

 One protective graphite disc added to each end

One end cap on each end

Monday, April 01, 2019, 16:35

Container was coated with TaC and a roll of graphite inserted inside the tube.   A couple of TaC coated Ta springs inside to keep graphite pressed against walls of cylinder.

Container wrapped with 2 Ta heat shields.

Desired temp = 1900 C, Omega slope set = 0.990, Auto ramping TGHT at 1A/min to reach 400A, TGHT will be tapped up accordingly to reach desired Temp.

Good vac at 3.00-5 Torr

Bad vac at 5.0e-5 Torr.

Chamber is currently being pumped down.  Sintering will proceed tomorrow.

Tuesday, April 02, 2019, 06:27

IGP1 = 4.37e-7 Torr

Current is manually tapped to 40 A

Tuesday, April 02, 2019, 08:12 

Pressure increased to IGP1 = 1.15e-5 Torr

and it stabilized to IGP1 = 2.32e-6 Torr after ~1.5 hrs

Autoramp is set to 1 A/min to 400 A

Tuesday, April 02, 2019, 08:45

Autoramp stopped momentarily, to stop current reduction

When pressure reduced to ~4e-5Torr, current was tapped manually to 50 A

Autoramp is set again, the conditions are

IGP1 = 2.5e-5 Torr

TGHT = 58.87 A, 0.36 V

Tuesday, April 02, 2019, 09:31

Autoramp stopped momentarily, to avoid current reduction

When pressure reduced, autoramp is set again,

the conditions are:

IGP1 = 2.9e-5 Torr, TGHT = 0.52 V, 71.5 A 

 Tuesday, April 02, 2019, 15:32

 Autoramp stopped momentarily, to avoid current reduction

conditions: IGP1=4.99e-5 Torr, TGHT = 0.78 V, 85.9 A

When pressure reduced, autoramp is set again,

 Tuesday, April 02, 2019, 22:37

Camera conexion was lost

Autoramp reached 400 A

the current was manually raise to 425 A to allow the completation of the process

Wednesday, April 03, 2019, 00:27

Camera connection still off

The current was reduced to 410 A to match with the estimated temperature 

Wednesday, April 03, 2019, 06:56

Camera connection is back, temperature reading is 1786 C

IGP1  5.01e- Torr

TGHT = 6.93 V, 412.22 A

Autoramp was set to -1A/min to 0A

Wednesday, April 03, 2019, 11:01

IGP1 = 1.67e-7 Torr

TGHT = 2.25 V, 179.53 A

Autoramp changed to -2 A/min 

Wednesday, April 03, 2019, 16:54

The tube was removed from the EVAP2,

The coating has a different color than regular coatings, but it doe not seem like the graphite adhered as expected. 

Tuesday, April 30, 2019, 09:33

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

Desired temp = 1900 C, Omega slope set = 0.990, Auto ramping TGHT at 1A/min to reach 400A, TGHT will be tapped up accordingly to reach desired Temp.

TBHT will be set fixed at 230A (max). TBHT at 1A/min to reach 230A.

Good vac at 3.0e-5 Torr

Bad vac at 5.0e-5 Torr.

Chamber is currently being pumped down (since yesterday evening).

Tuesday, April 30, 2019, 10:25 

Current pressure at IGP1 = 5.17e-7 Torr

Manual tapping to 40A on TBHT and TGHT

TBHT 38.59A, 0.43V

TGHT43.69, 0.23V

waiting for pressure to stabilize.

 Tuesday, April 30, 2019, 15:15

Current pressure IGP1= 5.29e-07 Torr

Auto ramping TGHT at 1A/min to reach 400A, and TBHT at 1A/min to reach 230A.

Wednesday, May 01, 2019, 08:41

Target current of 400A reached around 00:19 am

Will tap up to 444A on TGHT as projected from plot of temperature vs current (attachment 1)

Current IGP1=5.91e-07 Torr

Wednesday, May 01, 2019, 09:54

At 444A 1900C not reached.  Continue tapping to 1900C (attachment 2)

1900 C reached at 459 A on THGT.

will leave at 1900C for 4 hours.

 Wednesday, May 01, 2019, 14:21

IGP1= 6.7e-7 Torr

After 4.5  hours, TGHT was ramped down @ 2A/min and TBHT @1A/min overnight

Thursday, May 02, 2019, 10:46

 Vented Evap 2 and removed the target container.

Tuesday, June 04, 2019, 08:36

Each endcap is separated with a disc of graphite foil and rolled into packs of 5 within a foil envelope in a target boat.

There are also 4 coated springs, 2 on each side of the stack of endcaps.

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

Chamber pumped down overnight.

OMEGA slope = 0.99

IGP1 = 3.5e-7 Torr

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

Final desired temperature on OMEGA (tap)= 1800C

Tuesday, June 04, 2019, 11:54

IGP1= 6.1e-06 Torr

TGHT= 40 A

Begin autoramp to 400A at 1A/min

Out-gassing cycles observed.  Reduced autoramp to 0.5A/min

Currently TGHT=65A, 0.60 V

Wednesday, June 05, 2019, 08:27

TGHT = 321A, 4.9V @1149C

IGP1= 8.49 e-6 Torr

Set autoramp to 1A/min to530 A

Wednesday, June 05, 2019, 13:26

TGHT 530A, 9.2V

IGP1= 3.01e-05 Torr

OMEGA Temperature = 1689 Celsius

Set autoramp to 570A at 1A/min

 Wednesday, June 05, 2019, 15:51

Tapped manually to 1800 Celsius

TGHT 579A, 10.1V

IGP1= 2.06e-05 Torr

TGHT tapped down to 575A when OMEGA T ~1810 C

Thursday, June 06, 2019, 08:13

TGHT = 575A, 9.95V

OMEGA = 1809 C

IGP1 = 4.1e-7 Torr

Initiating auto-cool at -2.0A/min

Thursday, June 06, 2019, 16:00

After 1 hour  of TGHT at 0A and 0V, unloaded the Target boat.

Monday, June 24, 2019, 08:24

Total number of foils: 484

Total mass in  including container = 1495 grams

Total length packed 17.28 cm

container has 3 Ta heat shields.

No endcaps inserted to facilitate outgassing

Two TaC coated Ta wire springs inserted at either end.

Initially will heat via autoramp to OMEGA 1400 C , ramping TGHT at  0.1 A/min to reach 530A A (Omega slope set = 0.990)

Then temperature= (Correction to 1800C) 1900 C, Omega Slope set = 0.990, Auto TGHT at 0.2A/min to reach 700A, TGHT will be tapped up accordingly to reach desired Temp.

TBHT will be set fixed at 230 A (max).  TBHT at 0.1 A/min.

Good vac at 3.00 e -5 Torr

Bad vac at 5.00 e-5 Torr

System was pumped down on Friday June 24th, 2019.

IGP1= 3.3 e-07 Torr

(EPICS was down this morning and came back up around 930 a.m.)

Will proceed to manually tap up TGHT and TBHT to 40A as soon as EPICS stability confirmed

Mondayy, June 24, 2019, 15:30

TBHT = 39 A, 0.4V

TGHT=40 A, 0.1V

IGP1= 4.3 e-06 Torr and trending down

Autoramp increments to 0.1 A/min , to 400A on TGHT and 230A on TBHT

Tuesday, June 25, 2019, 08:40

Current has only increased to 53 A and pressure limit reached.  Lowered current back to 51 A on TGHT and TBHT.  Waiting for pressure to stabilize.

Tuesday, June 25, 2019, 12:16

TGHT 51.3 A, 0.39 V

TBHT 51.1 A, 0.58 V

IGP1 = 1.91 e-05 Torr

Starting autoramp with  increments to 0.1 A/min , to 400A on TGHT and 230A on TBHT

 Saturday, June 29, 2019, 22:45

Autoramp increments for TGHT set to 0.2 A/min

 IGP1=2.4 e-06 Torr

 Sunday, June 30, 2019, 07:46

Autoramp incrementsTGHT set to 0.1 A/min to prevent pressure spike. 

IGP1= 1.5 e-05 Torr

 Sunday, June 30, 2019, 08:26

Set autoramp increments on TGHT back to 0.2 A/min

Sunday, June 30, 2019, 15:47

Set autoramp max on TGHT to 500 A

Sunday, June 30, 2019, 21:15

OMEGA = 1240C

TGHT= 465A, 7.0V

TBHT = 233A, 3.2V

IGP1= 1.6 e-05 Torr

Set autoramp max on TGHT to 600A

Monday, July 01, 2019, 09:48

OMEGA = 1605 C

TGHT = 599A, 9.7V

TBHT = 233A, 3.2V

IGP1= 1.3 e-06 Torr

Set autoramp max on TGHT to 650A

Monday, July 01, 2019, 18:21

OMEGA = 1630 C

TGHT = 650 A, 10.6V

TBHT = 233A, 3.2V

IGP1 = 9.7 e-07 Torr

Set utoramp max on TGHT to 700A

Monday, July 01, 2019, 22:07

OMEGA = 1663 C

TGHT = 682A, 11.4V

TBHT = 233A, 3.2V

IGP1= 1.5 e-06 Torr

Set autoramp max on TGHT to 730A

Tuesday, July 02, 2019, 08:15

OMEGA =1700 C

TGHT = 730A, 12.0V

TBHT = 233A, 3.2V

IGP1= 1.1 e-06 Torr

Set autoramp max on TGHT to 750A and increments to 0.4A/min

Tuesday, July 02, 2019, 09:49

Temperature on OMEGA began dropping.  Changed OMEGA slope to 1.09 (Elog 371) and temperature reading = 1884 C.  Aborted autoramp and lowered TGHT current to 740A.

Tuesday, July 02, 2019, 12:14

Temperature and pressure have dropped at a consistent rate. 

IGP1= 9.6 e-07 Torr

OMEGA = 1715 C

Will tap up manually to 750A on TGHT

No appreciable increase in pressure will tap back down to 745A on TGHT

Tuesday, July 02, 2019, 13:11

OMEGA = 1675 C

TGHT = 745A, 12.4V

TBHT = 233A, 3.2V

IGP1 = 1.03 e-06Torr

 Will start to ramp- down TGHT @ -2.0A/min

OMEGA = 1354 C

TGHT = 495A, 7.01V

TBHT = 233.2A, 3.2V

IGP1= 2.2 e-07 Torr

Continue ramp-down TGHT @ -2.0A/min

Tuesday, July 02, 2019, 17:14

TGHT = 285.5A, 3.4V

TBHT = 232A, 3.1V

IGP1= 1.4 e-07 Torr

Start TBHT ramp-down at -1.0 A/min

Wednesday, July 03, 2019, 08:37

Turned off TGHT and TBHT

IGP1 = 7.8 e-08 Torr

Wednesday, July 03, 2019, 13:18

Final total weight of Target = 1489.5 g

Removed 18 discs after weighing.

Tuesday, July 30, 2019, 15:33

ZrC backup Target 12.6 cm disc length, 465 g total weight (no springs and no analysis discs).

Total weight= 470 g.

20 Analysis discs weighing 2.368 g (10 at each end).

Two springs (one at each end).

OMEGA slope initially = 0.990  (was changed to 1.09 at higher Temperature as per eLog #434

Target is being pumped down.

Wednesday, July 31, 2019, 09:31

Desired temp = 1900 C, Auto ramping TGHT at  0.1 A/min to reach 400A then  TGHT will be tapped up accordingly to reach desired temperature. (eLog 434)

TBHT will be set fixed at 230A (max). TBHT at 0.1 A/min to reach 230A.

Note: Initially both TGHT and TBHT will be ramped up at 0.3A/min up to 30A each.

IGP1= 1.35e-06 Torr

Good vac at 3.00-5 Torr

Bad vac at 5.0e-5 Torr.

Wednesday, July 31, 2019, 12:02

At 30A pressure was increasing a bit fast, therefore, the ramp was changed to increments of .1A every 120s (.05A/min). 

Thursday, August 01, 2019, 08:42

TGHT = 54.7

TBHT = 54.3

IGP1 = 3.86e-5 Torr

Will changer heat ramp to .1A/min by changing wait interval to 60s

Tuesday, August 06, 2019, 07:14

OMEGA = 1212 C

TGHT = 344.7 A, 5.79 V

TBHT = 233 A, 4.17 V

IGP1 = 1.05 e-06 Torr

Autoramping to 400A at increments of 0.1A/min

Tuesday, August 06, 2019, 09:50

OMEGA = 1233 C

TGHT = 360 A, 6.05 V

TBHT = 233 A, 4.18 V

IGP1 = 1.21 e-06 Torr

increasing autoramp increments to .5A/min

Tuesday, August 06, 2019, 12:27

OMEGA = 1356 C

TGHT = 400.6 A, 6.92 V

TBHT = 233.8 A, 4.20 V

IGP1 = 1.95 e-06 Torr

Autoramping to 430 A on TGHT at 0.5 A/min

Tuesday, August 06, 2019, 14:02

OMEGA = 1447 C

TGHT= 430.9 A, 7.66V

TBHT = 233.2A, 4.2 V

IGP1= 2.01e-06 Torr

Autoramping to 440 A on TGHT at 0.5 A/min

Wednesday, August 07, 2019, 09:10

OMEGA = 1548

TGHT = 441.56 A, 8.2 V

TBHT = 233.3 A, 4.2 V

IGP1 = 6.21e-07 Torr

Manually ramping up to 1900C @ 1A/min

Wednesday, August 07, 2019, 09:43

Changed OMEGA slope to 1.09 as per eLog #434

OMEGA reads 1773 C @ TGHT 451A, 8.4V

IGP1 = 7.02 e-07

Wednesday, August 07, 2019, 10:56

OMEGA = 1903 C

TGHT = 483.5 A, 9.2V

TBHT = 233.3 A, 4.3V

IGP1 = 1.7 e-06 Torr trending down

Wednesday, August 07, 2019, 11:40

OMEGA = 1914 C

TGHT = 483.5 A, 9.3V

TBHT = 233.3 A, 4.3V

IGP1 = 1.5 e-06 Torr trending down

Decrease TGHT current to 480.4 A

Wednesday, August 07, 2019, 13:04

OMEGA = 1918 C

TGHT = 480.3 A, 9.4V

TBHT = 233.3 A, 4.3V

IGP1 = 1.28e-06 Torr

Decrease TGHT current to 474.5 A

Wednesday, August 07, 2019, 13:26

OMEGA = 1904 C

TGHT = 474.8 A, 9.3V

TBHT = 233.3 A, 4.3V

IGP1 = 1.11e-06 Torr

Wednesday, August 07, 2019, 13:47

OMEGA = 1912 C

TGHT = 474.8 A, 9.3V

TBHT = 233.3 A, 4.3V

IGP1 = 1.10e-06 Torr

Decrease TGHT to 471.8 A

OMEGA temperature went down to 1904 C

Wednesday, August 07, 2019, 14:26

OMEGA = 1911 C

TGHT = 471.8 A, 9.3V

TBHT = 233.3 A, 4.3V

IGP1 = 1.00e-06 Torr

Decrease TGHT to 469.0 A

OMEGA temperature down to 1904C

Wednesday, August 07, 2019, 15:45

OMEGA = 1912 C

TGHT = 468.8.8 A, 9.2V

TBHT = 233.3 A, 4.3V

IGP1 = 9.2e-07 Torr

Decrease TGHT to 466.0 A

OMEGA temperature down to 1903C

Wednesday, August 07, 2019, 22:09

OMEGA = 1924 C

TGHT = 466.8. A, 9.3V

TBHT = 233.3 A, 4.3V

IGP1 = 7.6e-07 Torr

Cooling at 2A/min TGHT to 456.0 A, 9.0 V and 1A/min TBHT to 230.1 A, 4.2 V

OMEGA = 1900 C

Will allow Pressure to stabilize

 Thursday, August 08, 2019, 06:54

OMEGA = 1919 C

TGHT = 456.9 A, 9.1V

TBHT = 230.3 A, 4.2 V

IGP1 =5.7e-07 Torr

Cooling at 2A/min TGHT and 1A/min TBHT

Thursday, August 08, 2019, 13:30

Target removed from Evap2.  Awaiting inspection by John.

Friday, September 06, 2019, 11:20

Container was coated with Tac and wrapped with 2 Ta heat shields.

Desired temp=1900 C, Omega slope set =0.990

Chamber pumped down over night and will be initially tapped manually to 40A for both TGHT and TBHT.

Subsequently, current will be automatically ramped up in increments of 1A/min to reach 400A for TGHT and 230A for TBHT.

Then TGHT will be manually tapped to target temperature and allow to stabilize for a minimum of 3 hours.

Good vac at 3.0e-5 Torr

Bad vac at 5.0e-5 Torr

Friday, September 06, 2019, 11:32

IEVAP2:IGP1=9.6e-7 Torr

Tapping to 40A (TGHT and TBHT).

Friday, September 06, 2019, 12:54

Start autoramp

1A/min TGHT and TBHT

IGP1=4.0e-06 Torr

Friday, September 06, 2019, 13:29

TGHT = 70A, TBHT=70A, pressure started to spike rapidly so aborted autoramp and lowered the current to 66A for both TGHT and TBHT.

pressure continued to rise so tapped current to 60A.  A drop observed.  Will allow to stabilize.

Friday, September 06, 2019, 14:06

IGP1=5.3e-06 Torr.  Restart previous ramping. 

At 66A paused ramping.  IPG1= 1.0e-5 Torr

Friday, September 06, 2019, 15:44

IGP1=6.0e-6 Torr

Start modified autoramping: 0.4A/min for TGHT and TBHT.  Will manually tap up in the morning, over ham and eggs. 

Saturday, September 07, 2019, 10:52

 Will tap up to 423 A on TGHT as per attachment #1 regression

IGP1= 1.13e-6 Torr

OMEGA = 1802 C

TGHT= 401.0 A, 6.84V

TBHT=233.6A, 4.1V

Saturday, September 07, 2019, 11:06

Tapped up TGHT to 438A

OMEGA= 1903C

Will monitor and adjust if necessary.

Saturday, September 07, 2019, 15:06

IGP1 =  1.17e-6 Torr

TGHT = 7.46 V, 439.3 A

TBHT = 4.13 V, 233.4 A

Autoramps

TGHT = -2 A/min, TBHT = -1 A/min

Monday, September 09, 2019, 16:34

The EVAP2 was vented and the target container was removed. 

Thursday, October 03, 2019, 08:58

Ta tube was coated with TaC and wrapped with Ta heat-shields (3 layers)

Initial weight including heat-shields = 427 g

Desired temperature = 1900 C (expected TGHT ~430 A), TBHT will be set fixed at 230A (max).

Evap 2 was pumped down previous night.

IGP1= 7.81e-07 Torr

Manually tapping up to ~40A on both TGHT and TBHT at ~1A/min

Good vacuum = 3.00 e-5 Torr

Bad vacuum = 5.00 e-5 Torr

Thursday, October 03, 2019, 09:21

Manually tapped to 50A on TGHT and TBHT

Will allow pressure to stabilize and begin autoramp TGHT and TBHT at 1A/min to 400A and 230A respectively.

autoramp increments might be increased to 2A/min depending on stability of system.

Thursday, October 03, 2019, 10:00

TGHT = 51.6A, 0.36V

TBHT = 49.5A, 0.62V

IGP1=9.6e-7 Torr

Starting autoramp at 1A/min to a max of 400A for TGHT and 230A for TBHT.  Will monitor and increase ramp increments to 2A/min if stable.

Thursday, October 03, 2019, 11:09

TGHT = 103A, TBHT=97A

IGP1=9.1e-06 Torr and dropping

Will increase autoramp increments to 2A/min

Thursday, October 03, 2019, 11:41

With TGHT = 148A, 1.9V and TBHT = 141A, 2.3V

IGP1= 7.9e-6 Torr

Autoramp was increased to 3A/min

Thursday, October 03, 2019, 13:45

TGHT=401A, 6.9V

TBHT=233A, 4.2V

IGP1= 1.14e-05Torr

OMEGA = 1874

begin manual ramp to 1900C

(Temperature dropping as pressure drops)

 Thursday, October 03, 2019, 14:11

 TGHT= 416A, 7.1V

TBHT=233A, 4.2V

OMEGA = 1900 C

IGP1= 6.9e-06 Torr and trending down

Thursday, October 03, 2019, 15:24

TGHT manually bumped to 421A,  7.2 V because temperature dropped slightly.

Thursday, October 03, 2019, 19:00

TGHT manually increased to 425A, 7.3V

Thursday, October 03, 2019, 19:12

TGHT = 424.9A, 7.3V

TBHT=233.2A, 4.1V

OMEGA= 1897 C

IGPA=1.45e-06 Torr

Starting ramp-down at -1A/min on TGHT and 0.5A/min on TBHT

Friday, October 04, 2019, 11:34

Container taken out.

Friday, October 04, 2019, 11:37

Each endcap is separated with a disc of graphite foil and rolled into packs of 5 within a foil envelope in a target boat.

There are also 3 coated springs, one in between endcaps and two on either end

The boat is wrapped with 2-layers of Ta heatshields.

Chamber pumping down

OMEGA slope = 0.99

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

Final desired temperature on OMEGA (tap)= 1800C

Monday, October 07, 2019, 09:08

Sunday night heating started at 1A/ min on TGHT to 54 A

heating paused for 1 hour to allow IGP1 to equillibrate.  Then restarted at 1A/min to 400A as planned. 

This morning IGP1 = 1.3e-06 Torr

TGHT = 401A, 4.2V

OMEGA = 1550 C

Monday, October 07, 2019, 09:36

manually tapping to 1800 C

Monday, October 07, 2019, 14:09

Temperature @ ~1800 for 3.5 hours

TGHT= 495.4, 9.2 V

IGP1= 1.1e-06 Torr Pressure Steady there begin cooling

Cooling @ -2A/min