Tuesday, June 07, 2022, 07:19

Total number of foils: 403 ( including 5 analysis discs on the right side of the container)

Total weight = 1535.3 g (includes heatshields, spring and T bar)

Total length packed 16.4 cm (excluding 5 analysis discs that will be removed)

container has 3 Ta heat shields.

No endcaps inserted to facilitate out-gassing

Ta coated spring at  front (right) side

Initially to ramp TGHT and TBHT to 50A at 3 A/min

then continue to 80A and slow down ramp when pressure begins to increase

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 3.00 e -4 Torr

Bad vac at 5.00 e-2 Torr

 IGP1= 7.6 e-07 Torr at start of initial ramp.

 Tuesday, June 07, 2022, 11:14

Ramping to 150A on TGHT and TBHT at 1A/min

Ramped TGHT and TBHT to 230A at 2A/min

Tuesday, June 07, 2022, 13:12

Ramping TGHT to 600A at 4A/min

TBHT at 230A, 3.0V

Tuesday, June 07, 2022, 16:41

TGHT= 740 A, 12.1V

TBHT= 232A, 3.0 V

OMEGA reading 1616C but questionable.  Will leave for 4 hours at 740A top TGHT.

Wednesday, June 08, 2022, 22:15

Early Wednesday morning the left TGHT bolt was found damaged.  The target leg was coated with bolt material rendering the Target inoperable.   

The Heatshield assembly was swapped and surfaces cleaned.  A "dummy" FEBIAD was installed to test if the system can withstand high current. 

The system was pumped down and ramped to 740A on TGHT at 4A/min.  It was then left at that current for 4 to 5 hours.

Currently starting rampdown at -2A/min to 0A. 

Photos of the incident attached in *eLog 580*.  IGP1= 5.7e-06 Torr

TGHT= 742A, 11.4V

Tuesday, March 09, 2021, 11:54 

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

Desired temperature= 1900 C, Omega Slope set = 0.990, Auto TGHT at 0.2A/min to reach 400A, TGHT will be increased  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

Wednesday, March 10, 2021, 08:32

IGP1 = 2.6 e -07 Torr

Start autoramp @ 1A/min to 40 A on both TGHT and TBHT

***Autoramp aborted due to work on EF12 affecting EVAP2***

Will have to resume Thursday or Friday

Saturday, March 13, 2021, 7:54

  IGP1= 3.8e-07 Torr

Initiate heating @ 0.5A/min TBHT and TGHT to 60 A

Saturday, March 13, 2021, 23:01

IGP1 = 2.7e-07Torr

TGHT = 60.5A, 0.7V

TBHT= 60.0A, 0.7V

Initiate ramp @ 1 a/min to 400 A on TGHT and 230A on TBHT

Sunday, March 14, 2021, 08:45

IGP1= 8.2e-07 Torr

TGHT = 400A, 5.6V

TBHT = 232.9A, 3.0V 

OMEGA = 1142 C

Continue ramping to 460 A on TGHT at 1a/min

 Sunday, March 14, 2021, 10:11

IGP1 = 1.0 e-06 Torr

TGHT= 460.4 A, 6.5 V

TBHT = 232.9 A, 3.0 V

OMEGA = 1239 C

Will ramp up to 500 A at 1a/min on TGHT

Sunday, March 14, 2021, 10:53

 IGP1 = 1.3 e-06 Torr

TGHT= 495 A, 7.2 V

TBHT = 232.9 A, 3.0 V

OMEGA = 1316 C

Will ramp up to 600 A at 1a/min on TGHT

Sunday, March 14, 2021, 12:45

IGP1 = 3.0 e-06 Torr

TGHT= 604 A, 9.1 V

TBHT = 232.9 A, 3.1 V

OMEGA = 1610 C

Will ramp up to 660 A at 1a/min on TGHT 

Sunday, March 14, 2021, 17:01

IGP1= 2.4e-06 Torr

TGHT =  664 A, 10V

TBHT = 232.9 A, 3.1V

OMEGA = 1733 C

tapping TGHT to 740 A

OMEGA = 1883 C

 Sunday, March 14, 2021, 21:45

IGP1= 3.1e-06 Torr

TGHT =  744A, 11.5V

TBHT = 232.9 A, 3.2V

OMEGA = 1875 C

Start cooling TGHT @-3A/min and TBHT @-1A/min

 Ta#56 HP-SIS target description:

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

Foil Thickness = 0.025mm

Target density = 14.01 g/cm3

Target length = 3.4 cm

Total Mass = 47.374 g [Incl foils + Ta wire on 6 packs]

Total mass w/ Target oven= 1469 g

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

Thursday, June 21, 2018, 11:430: Ta#56 loaded into Evap 2 

Thursday, June 21, 2018, 11:37: Roughing

Thursday, June 21, 2018, 11:48 : Turbo pump started.

Thursday, June 21, 2018, 11:56 : Turbo pump at speed

Monday, June 25, 2018, 08:00: Vacuum @ 3.35e-07T

Monday, June 25, 2018, 08:05: TGHT/TBHT Power supplies switched on.

Monday, June 25, 2018, 09:35: Vacuum @ 3.23e-07T. Manually bump up TGHT to 40A.

Slope found / set.

TBHT will be ramped up to 230A at 1.0A/min.

TGHT will be ramped up to 650A at 2.0A/min.

Final desired temperature = 1900C

OMEGA slope = 0.98

Monday, June 25, 2018, 11:41: Auto-ramping TGHT / TBHT @ 2 / 1 A per min to 300 / 180 A 

Monday, June 25, 2018, 13:28: Check: Vacuum @ 1.08e-06T. TGHT / TBHT @ 248 / 110 A

Monday, June 25, 2018, 13:50: TGHT ramping halted momentarily. Limit increased to 350 A, continue ramping.

Monday, June 25, 2018, 14:44: Check: Vacuum @ 1.08e-06T. TGHT / TBHT @ 350 / 180 A. (hold till am)

Omega: 1033 deg C

Tuesday, June 26, 2018, 08:37: Vacuum @ 3.03e-07T. Auto-ramping TGHT / TBHT @ 2 / 1 A per min to 600 / 230 A . Omega: 1010 deg C (approx)

Tuesday, June 26, 2018, 11:25: Vacuum @ 1.34e-06T. TGHT / TBHT @ 248 / 110 A. Omega: 1605 deg C (approx) 

Auto-ramping TGHT  @ 2 A per min to 650 A

Tuesday, June 26, 2018, 12:06: Limited at 608A ? Display still ramping past the auto-ramp limit. 

Tuesday, June 26, 2018, 12:24 : Auto ramp halted. Display brought to 610 A. Readback 603 A

Tuesday, June 26, 2018, 12:41: Voltage limit adjusted to 12.00V. Mnaualy increased TGHT to 620 A. Auto-ramping TGHT  @ 2 A per min to 650 A

Tuesday, June 26, 2018, 12:59: Check: Vacuum @ 1.53e-06T. TGHT / TBHT @ 650 / 230 A. 

Omega: 1747 deg C

Tuesday, June 26, 2018, 15:07: Check: Vacuum @ 9.73e-07T. TGHT / TBHT @ 650 / 230 A. (hold till am)

Omega: 1760 deg C

Wednesday, June 27, 2018, 07:49: Check: Vacuum @ 5.06e-07T. TGHT / TBHT @ 650 / 230 A.

Omega: 1796 deg C. Begin auto-ramping TGHT to 700 A @ 2 A per min with pause at 675 A. Monitor.

Wednesday, June 27, 2018, 08:00: Check: Vacuum @ 5.80e-07T. TGHT / TBHT @ 675 / 230 A.

Omega: 1843 deg C. Begin auto-ramping TGHT to 700 A @ 2 A per min. Monitor.

Wednesday, June 27, 2018, 08:16: Vacuum @ 7.45e-07T. TGHT / TBHT @ 700 / 230 A. Omega: 1890 deg C (approx). 

Wednesday, June 27, 2018, 08:23: Vacuum @ 8.53e-07T. TGHT / TBHT @ 707 / 230 A. TGHT Voltage= 10.783V. Omega: 1906-1913 deg C. Desired temperature = 1900C reached.

Wednesday, June 27, 2018, 13:11: Vacuum @ 6.77e-07T. Omega: 1902-1915 deg C

Wednesday, June 27, 2018, 14:53: Begin auto-cooling TGHT / TBHT @ - 2 / -1 A per min overnight. 

Thursday, June 28, 2018, 07:39: Power supplies off. Turbo pump off.  

Thursday, June 28, 2018, 09:38: Vented. Remove From Evap 2.

Friday, March 13, 2020, 13:52

Total number of foils: 493

Total length packed 17.4 cm

container has 3 Ta heat shields.

No endcaps inserted to facilitate out-gassing

Two TaC coated Ta wire springs inserted at both ends.

Initially to ramp TGHT and TBHT to 50A at 1A/min

Then heat manually to OMEGA ~1400 C , ramping TGHT manually and automatically  to reach 530A A (Omega slope set = 0.990)

Then temperature = 1800 (C using slope 1.08 at after 1700C manually and automatically ramp to 700A then  TGHT will be tapped up accordingly to reach desired Temp).

TBHT will be set fixed at 230 A (max).  TBHT heated manually and automatically to max.

Good vac at 3.00 e -5 Torr

Bad vac at 5.00 e-5 Torr

Evaluation discs not included because no space.

Total Green disc mass measured = 58.78 g

Friday, March 13, 2020, 14:22

Container loaded and pressuring down started without any pump issues.

Friday, March 13, 2020, 23:26

IGP1= 9.1e-07 Torr

Start auto tap at .25A/min to 50A on both TBHT and TGHT

Saturday, March 14, 2020, 07:09

IGP1=6.9e-6 Torr

TGHT = 49.1 A, 0.58V

TBHT = 49.2A, .49V

Continue ramp to 80 A on both heaters at .0.25A/min (good vacuum 3.0 e-04 Torr, bad vaccum 5.0 e-04 Torr

Saturday, March 14, 2020, 08:22

IGP1=6.8 e-05 Torr

Pressure spike TGHT =63.7 A, 0.77 V; TBHT = 60.0 A , 0.62 V

Aborted ramp alow to stabilize (Tapped TBHT to 63.8 A

Saturday, March 14, 2020, 12:16

IGP1= 8.1e-05 Torr

start autoramp at 0.25A/min

Saturday, March 14, 2020, 17:47

IGP1= 2.9e-05 Torr

TGHT= 78.4A, 1.0 V

TBHT = 79.4A, .88 V

manual and automatic  tap up to 740A TGHT and 230A TBHT then tap manually to 1800 C (mostly at .075 A/min and increasing to 1A /min as pressure stabilizes)

Sunday, March 15, 2020, 22:40

OMEGA = 1711 C

TGHT = 784,6 A, 12.9V (readback)

TBHT = 232 A, 3.5 V

Tap TGHT to 800 A readback set to 815A

Sunday, March 15, 2020, 23:20

OMEGA =1801 C

TGHT = 799.2 A, 13.3 V, TBHT = 232.9, 3.6V

Start gradual tap-down as temperature rising (1810 C at end of this note)

Sunday, March 15, 2020, 23:49

OMEGAA = 1818 C

TGHT = 769.9A, 12.6 V; TBHT = 232.9 A, 3.6 V

Temperature dropping tapped back up to 799 A on TGHT read back (set to 815 A)

Monday, March 16, 2020, 04:10

OMEGA = 1395 C (not reliable)

TGHT = 799.2 A, 13.2 V

TBHT = 232.9 A, 3.6 V

IGP1 = 2.2 e-06 Torr

Initiate cooling at -1.5 A/min on TGHT to 600A (at 600 A increase cooling rate to 3 A/min ; at 300 A increase cooling to 4 A/min and start TBHT cooling at 1 A/min; at `200 A on TGHT increase cooling to 4 A/min and TBHT 2 A/min)

Monday, March 16, 2020, 09:43

TGHT = 0 A , 0.02V

TBHT = 53,2 A, .56 V  (increase cooling to 4 A/min)

IGP1= 1.12e-07 Torr

Monday, March 16, 2020, 10:37

IGP1= 9.5 e -8 Torr

TGHT and TBHT = 0A, 0V

Will unload container

Monday, March 16, 2020, 12:40

Ten discs removed for evaluation (6 from left side and 4 from right side)

two graphite discs placed at each end as well as two TaC coated and sintered end-caps

total length after sintering = 17.8 cm

Monday, March 9, 2020, 03:15

Container coated with TaC and wrapped with 3 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

Tuesday, March 10, 2020, 09:17

Starting manual ramp to 50 A @ approximately 2A/min

IGP1 = 3.73e-7 Torr after opening water line pressure slowly incresed to 4.4e-7 Torr

TBHT also has Chiller interlock reached out to controls for removal.

Tuesday, March 10, 2020, 10:47

Chiller Interlock removed for TBHT.   Started manual ramp to 50A @ approximately 2A/min

Tuesday, March 10, 2020, 11:15

allowing to stabilize at 50A on TGHT and TBHT

IGP1= 7.9 e=7 Torr and trending up

Tuesday, March 10, 2020, 12:09

Pressure on IGP1 spiked.  Allowing to stabilize.

Tuesday, March 10, 2020, 14:36: Stopped By to check. Vacuum @ 3.02e-03T. Turbo pump appears to have tripped. Shut off Both PS. Prepare to vent. - Aaron S.

Tuesday, March 10, 2020, 14:48: Tightened all fittings (Just in case). HS side & HS waterline at the feed through. Roughing. 

Tuesday, March 10, 2020, 15:06: TP1 @ 38KRPM 1.34e-04T & dropping.  TGHT & TBHT PS on. Monitor before heating. -AS

Wednesday, March 11, 2020, 06:25: Vacuum @ 3.39e-07T. TGHT / TBHT PS on. - AS

Wednesday, March 11, 2020, 06:26: Manually tapped up TGHT / TBHT to 10 / 10 A. Ok.

Wednesday, March 11, 2020, 06:28: Auto-ramping TGHT / TBHT @ 4 A per min to 50 / 50 A.

Wednesday, March 11, 2020, 07:07: Vacuum @ 3.64e-07T. TGHT / TBHT @ 50 A. All appears stable. - AS

Wednesday, March 11, 2020, 07:036

Started autoramp  at 2 A/min

IGP1= 3.6e-7 Torr

Wednesday, March 11, 2020, 08:06

TGHT=10 5A, 1.3 V       TBHT = 105 A, 1.2 V

pressure rising fast; manual ramp down to 95A on both TGHT and TBHT

 Wednesday, March 11, 2020, 09:54

 IGP1= 4.7e-6 Torr; TGHT = 93.1 A, 1.2 V; TBHT = 95.1 A, 1.1 V

start autoramp at 1A/min (0.5 A/30s)

IGP1= 1.28e-5 Torr

TGHT = 108.3 A, 1.44 V

TBHT = 110 A, 1.29 V

Stop autoramp

Wednesday, March 11, 2020, 10:25

IGP1= 5.9e-5 Torr

manually tapped TGHT and TBHT set-current to  105 A respectively. 

pressure dropping.

Wednesday, March 11, 2020, 11:18

IGP1=8.0e-06 Torr

manually ramp to set-current 115 A for both TGHT and TBHT at approximately 2A/ min

allow to stabilize before proceeding

Wednesday, March 11, 2020, 12:12

IGP1=7.02e-6 Torr

TGHT = 112.7 A, 1.5 V

TBHT = 114.6 A, 1.4 V

Auto-ramping at 1A/min TGHT to 430 A and TBHT top 230A

 Wednesday, March 11, 2020, 18:45

IGP1= 1.2 e-06 Torr

TGHT=421.8 A, 6.2 V

TBHT = 231.9 A, 3.1 V

auto-ramp TGHT at 1A/min to set-current 530A

Wednesday, March 11, 2020, 23:08

IGP1= 1.3e-6 Torr

TGHT= 519.9 A, 7.87V

TBHT = 232.0 A, 3.1 V

start autoramp TGHT to 600A at  1A/min

Wednesday, March 11, 2020, 23:36

IGP1= 1.6e-6 Torr

TGHT = 542.9 A, 8.2V

TBHT = 232.9 A, 3.1V

Set autoramp to 750A on TGHT at 0.5 A/min

Thursday, March 12, 2020, 06:55

The Voltage set on TGHT was too low so current had not increased

IGP1= 1.5e-6 Torr

TGHT = 640 A, 10V

TBHT 232/9A, 3.1V

Oncrease TGHT voltage set to 14.5 and start autoramp at 3A/min to 750 A

Thursday, March 12, 2020, 7:43

TGHT = 735.7 A, 11.8V

OMEGA = 1595C

Auto -ramp set to 780 A for TGHT

Thursday, March 12, 2020, 7:58

OMEGA = 1655 C

TGHT set to 800 A at 3A/min

Thursday, March 12, 2020, 9:42

OMEGA =  1704 C

TGHT = 789.5 A, 13.0 V

Manual tap up to 837 A set on TGHT and 821 A readback

Thursday, March 12, 2020, 10:00

TGHT readback = 821.0 A, 13.7 V

OMEGA = 1744 C

TBHT same as previous entry.

 Thursday, March 12, 2020, 10:35

 Tapped up TGHT to 832.6 A, 13.8 V

OMEGA = 1759 C

TBHT = 232.9 A, 3.6 V

Will not tap further. 

Thursday, March 12, 2020, 13:22

IGP1 = 5.0 e-06 Torr (stable)

TGHT = 832.7 A readback (849 A set), 13.7V

TBHT = 232.9 A, 3.6 V

OMEGA = 1758 C

Start cooling at TGHT 3A/min

 Thursday, March 12, 2020, 14:08

IGP1= 1.32e-06 Torr

TGHT = 706 A, 11.0 V

TBHT = same as previous

OMEGA = 1583C

Start cooling TBHT at 1A/min continue cooling TGHT at 3A/min

Friday, March 13, 2020, 08:18

IGP1= 3.9e-8 Torr

Will unload sintered container

 Monday, June 15, 2020, 13:30

Container coated with TaC and wrapped with 3 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

Wednesday, April 28, 2021, 11:54

Total number of foils: 449 (not including analysis discs)

Total length packed 16.7 cm

5 extra analysis discs and 2 dr. Blade discs

container has 3 Ta heat shields.

No endcaps inserted to facilitate out-gassing

One Ta disc inserted at front end

Initially to ramp TGHT and TBHT to 50A at0.5 A/min

Then heat manually to OMEGA ~1400 C , ramping TGHT manually and automatically  to reach 530A A (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 3.00 e -5 Torr

Bad vac at 5.00 e-5 Torr

Thursday, April 29, 2021, 10:09

IGP1 = 6.5 e-07 Torr

Start heating at 0.5 A/min to 50 A on both TGHT and TBHT 

Thursday, April 29, 2021, 21:45

 IGP1= 7.7 e-06 

TGHT = 50.3A , 0.59 V

TBHT = 49.4 A, 0.56 V

Pressure is taking a while to equilibrate.  Will wait a bit more to continue heating

Thursday, April 29, 2021, 23:49

IGP1 = 7.2 e-06 Torr

will start ramping at 0.5 A/min to 100 A 

Saturday, May 01, 2021, 20:09 

Friday, April 30, 2021, 08:19

IGP1 pressure higher than bad vacuum.  Stopped autoramp.  Will allow vacuum to come back down and restart ramp. 

Saturday, May 01, 2021, 09:04

Yesterday the system had tripped.  All pumps had turned off and the pressure was found at 0.005 torr

vacuum was restarted.

 Current IGP1= 6.5e-07 Torr

Restarting heaters.  

Autoramp at 0.5A/min to 20A on both TGHT and TBHT

Saturday, May 01, 2021, 10:48

IGP1=5.9e-7 Torr

TGHT = 20.0 A, 0.24V

TBHT = 20A, 0.20V 

 Autoramp at 0.5A/min to 40A both TGHT and TBHT

Saturday, May 01, 2021, 13:26 

TGHT = 40.0 A, 0.47 V

TBHT= 39A, 0.44V

IGP1= 5.5 e-07 Torr

Autoramp at 0.5A/min to 60 A on both TGHT and TBHT

Saturday, May 01, 2021, 20:09

TGHT = 60.0 A, 0.72V

TBHT = 59.4 A, 0.69V

IGP1= 4.4e-07 Torr

Autoramp at 0.5A/min to 100 A on both TGHT and TBHT

Sunday, May 02, 2021, 18:30 

IGP1= 1.7 e-06 Torr

TGHT =100A, 1.3V

TBHT = 99.9A, 1.3V

Autoramp both heaters at 0.25A/min to 120A and monitor 

Sunday, May 02, 2021, 18:45

pressure increase to 4.1e-06 Torr.  TBHT unexpectedly rose to 120A and was manually tapped back down to 104 A.  Will keep both , TGHT and TBHT, at 104 A  for a while. 

Sunday, May 02, 2021, 19:50

Stepping at 0.5A/min to 105A then to 110 A on both TGHT and TBHT

Sunday, May 02, 2021, 22:10 

Will leave both TGHT and TBHT at 110 A until pressure comes back down

currently IGP1= 1.3e-05 Torr

Monday, May 03, 2021, 09:35 

IGP1= 2.2 e-06 Torr

Tapping TGHT and TBHT to 115A 

Monday, May 03, 2021, 11:30

 Tapping TGHT and TBHT to 120A @ 1A/min

Monday, May 03, 2021, 18:38

IGP1= 5.4e-06 Torr

TGHT = 130.3 A, 1.8 V

TBHT = 129.1 A, 1.8 V

Continue gradual ramping at 1A/min in increments of 5 A 

Tuesday, May 04, 2021, 09:27

IGP1= 3.2e-5 Torr

TGHT = 400 A, 6.0V

TBHT = 232 A, 3.6V

OMEGA = 1104 C

waiting for pressure to drop then will continue heating 

Tuesday, May 04, 2021, 17:27

TGHT = 420.1 A, 6.5V

TBHT= 232A, 3.6V

OMEGA = 1139 C

IGP1= 1.15e-5 Torr 

will increase ramp up at 0.5A/min to 430A and hold (TGHT)

Tuesday, May 04, 2021, 22:43

TGHT= 430A, 6.6V

TBHT = 232.8A, 3.6V

OMEGA= 1157 C

IGP1=6.6e-6 Torr

 Set Autoramp at 0.5A/min to 540 A (TGHT)

Wednesday, May 05, 2021, 08:09

IGP1= 7.5e-06 Torr

TGHT = 534 A, 8.5V

TBHT=232 A, 3.7 V 

OMEGA = 1485

Continue ramp at 0.5A/min to to 600 A on TGHT

Wednesday, May 05, 2021, 15:07

IGP1=1.2e-5 Torr

TGHT=601A, 9.6V

TBHT= 232A, 3.7V

OMEGA =1600 C

ramp to 650A on TGHT at 0.5A/min 

Wednesday, May 05, 2021, 20:05

Tapped TGHT to 694A, 11.4 V (manually)

TBHT= 232A, 3.7V

OMEGA =  1790 C

IGP1= 2.5e-05 Torr

Will monitor Pressure and temperature .  Will start 4 hour count.

Wednesday, May 05, 2021, 22:03

OMEGA = 1765 C 

TGHT = 694A, 11.5V

TBHT = 232A, 3.8 V

IPG1= 1.6e-05 Torr

Manually bumping TGHT to 700 A

 Tuesday, June 20, 2017, 15:58

Target consists of 470 discs.

Total packed length 3.4cm [exactly 7.8cm space on both sides]

Total mass 50.3105g [Incl foils + Ta wire on 6 packs]

Target consists of 350 single discs and 6x20 packs of Ta discs

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

1 long Ta Heat shield.

No endcaps inserted, no Rh foil inserted.

Chamber currently pumping down.

TBHT will be ramped up to 230A at 1.0A/min.

TGHT will be ramped up to 600A at 2.0A/min.

Final desired temperature = 1900C

OMEGA slope = 0.98

Vacuum limit stop at 3.0e-5 Torr, backing off at 4.0e-5 Torr.

*Note: container accidentally engraved with WO#412218-6 when it should be WO#42218-6

Wednesday, June 21, 2017, 10:05 

HS water valves opened, no leaks detected.

Tapped up manually to 40A, vacuum stable.

IGP1 = 5.53e-7 Torr

IGP2 = 4.35e-7 Torr

Initiating auto-ramp.

 Wednesday, June 21, 2017, 14:48

TGHT stopped at 575A due to voltage limit sitting at 9V

Increased max setpoint of voltage to 14V.

Re-started auto-ramp starting at 575A.

Wednesday, June 21, 2017, 15:23  

TGHT = 600A, 8.95V

TBHT = 230A, 3.72V

IGP1 = 1.55e-6 Torr

IGP2 = 1.62e-6 Torr

OMEGA = 1538C

Increasing max setpoint of TGHT to 700A

 Wednesday, June 21, 2017, 16:21

TGHT = 700A, 10.57V

TBHT = 230A, 3.75V

IGP1 = 2.2e-6 Torr

IGP2 = 2.4e-6 Torr

OMEGA = 1730C

Increasing max setpoint of TGHT to 750A

 Friday, June 23, 2017, 15:41

TGHT = 780A, 11.77V

TBHT = 230A, 3.77V

IGP1 = 4.8e-7 Torr

IGP2 = 4.8e-7 Torr

OMEGA = 1890C

Conditioning process complete.

Initiating auto-cool at 2.0A/min for the TGHT and 1.0A/min for the TBHT.

 Monday, June 26, 2017, 10:51

Target vented in air and removed from evap2 today.

Endcaps inserted.

Target looks good!

Tuesday, September 14, 2021, 09:32

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

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

Evap 2 was pumped down over previous night

Good vacuum = 3.00 e-5 Torr

Bad vacuum = 5.00 e-4 Torr

IGP1= 1.12 e-06 Torr

Initiate manual ramp to 50 A @ 1A/min

Tuesday, September 14, 2021, 14:44

 IGP1= 1.25e-06 Torr

TGHT = 50A, 0.58V  TBHT = 49A, 0.56V

Start autoramp to 400 A TGHT and 230A TBHT @ 1A/min

Heated to 1880 C and held for 4 hours.  Log info written down but could not be found in system later.

Coating proceeded without issues.

 Monday, September 10, 2018, 15:09

Container is coated with TaC and wrapped with Ta heat-shield ( 3 layers)

Desired temp = 1900 C (expected TGHT ~445A/7.5V), TBHT will be set fixed at 230A (max).

Good vac at 3.00-5 Torr

Bad vac at 5.0e-5 Torr.

Chamber is currently being pumped down

 Tuesday, September 11, 2018, 09:27

Pressure at IGP1 8.61e-7 Torr. 

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

 Tuesday, September 11, 2018, 12:05

Pressure increased to 6.9e-e5 Torr and auto-ramp reduced the current:

TGHT from 94.6 A to 84.86 A

TBHT from 87.8 A to 78.87 A

(see figure EVAP2-_01)

EPICS automatically started ramping up TBHT and TGHT current when the pressure was between the good limit.

 Tuesday, September 11, 2018, 14:29

TBHT current reached ~230 A and EPICS stopped inputting current automatically. 

TBHT current reading on:

EPICS 232.8 A

Power supply: 235 A

 Tuesday, September 11, 2018, 16:53

TGHT reached 400 A, EPICS stopped auto-ramping automatically. (Fig. Heater-ramp and Plot_400A-230A)

Temperature read by OMEGA 1837 C (Fig. Tempeature-at-400A)

 Tuesday, September 11, 2018, 17:40

TGHT current was increased manually to 419 A (power supply current 422 A, EPICS plot 421.6 A) in steps of ~5A/2min

The temperature after ~30 min of being at 419 A is 1898 C.

The container will stay 5 hours at 1898 C 

Wednesday, September 12, 2018, 09:05 

EVAP2 remained at max setpoints for 5hrs

Auto-cool was set to 2.0A/min and 1.0A/min for the TGHT and TBHT respectively.

The automatic ramp decreased the TBHT current to 0A, but not so for TGHT, 

TGHT only reduced to 22 A, the TGHT was manually tapped to 0A

 Wednesday, September 12, 2018, 18:30

Process completed (fig. TaC-coating). 

Chamber was vented.

Thursday, April 21, 2022, 09:43

TaC coated Target container was placed in Evaporator 2 yesterday and left pressuring down.

Ta Heatshields: 3

Target temperature on OMEGA = 1800-1850 C

OMEGA slope: 0.990

Target time at temperature = 4 hours

Target final TBHT current: 230A

Approximate final TGHT current: 420A (will adjust manually)

Heating autoramp started @ ~2A/min on both TGHT and TBHT

initial IGP1 = 9.3e-7 Torr

Thursday, April 21, 2022, 10:38

Pressure trending down after peak.  Start autoramp at 1A/min to 50A on both TGHT and TBHT.

Thursday, April 21, 2022, 10:56

Pressure continues to decrease.  Will ramp up faster @4A/min to 90A for both TGHT and TBHT.

Thursday, April 21, 2022, 11:07

Second peak has  begun to form .  Will keep at 90A awaiting stabilization

Thursday, April 21, 2022, 11:35

pressure stable.  Continue to autoramp at 1A/min and if pressure stable increase ramp to 4A/min

Thursday, April 21, 2022, 11:49

small peak observed and stabilizing.  Autoramp @ 6A/min to 400A on TGHT and to 230A on TBHT

Thursday, April 21, 2022, 12:35

Regression plot .  1800C should be reached ~1800C. 

Thursday, April 21, 2022, 12:44

Target current reached. 

OMEGA = 1762 C

Will manually bump current to 415 A

OMEGA = 1802 @ 415 A @ 12:51 pm

Thursday, April 21, 2022, 16:50

 OMEGA=1823 C

IGP1= 2.9e-06 Torr

TGHT= 417 A, 7.2 V

TBHT= 232A, 3.0V

Rampdown will start at -2A/min for both TGHT and -1A/min TBHT

 Monday, June 05, 2017, 15:20

Container coated with TaC using 'flushing technique' and let dry over weekend.

Cleaned ionizer tube with acetone, no coating inside ionizer tube.

Wrapped with 3 x Ta heat shields, incl center block

Currently pumping down in evap2

OMEGA slope = 0.98

Good vac at 3.0e-5, bad vac at 4.0e-5 Torr.

 Tuesday, June 06, 2017, 10:00

First time not turning water off and flushing lines after last use.

HS water valves have remained open since the last time evap2 was used [conditioning Ta#52]

No leak check done.

Tapped up manually to 35A.

Waited ~25min

Vacuum stable.

IGP1 = 2.9e-6 Torr

IGP2 = 4.8e-6 Torr

Initiating auto ramp for TGHT @ 0.2A/min to a max setpoint of 350A

Initiating auto ramp for TBHT @ 0.1A/min to a max setpoint of 230A

Once max setpoints achieved, will tap up manually to final desired temperature of 1900C

 Wednesday, June 07, 2017, 09:26

TGHT = 304A, 4.46V

TBHT = 169A, 2.769V

IGP1 = 6.1e-7 Torr

IGP2 = 7.3e-7 Torr

Vacuum stable.

Increasing ramping rate to 1.0A/min and 0.5A/min for the TGHT and TBHT respectively.

 Wednesday, June 07, 2017, 10:40

TGHT = 350A, 5.28V

TBHT = 203A, 3.39V

IGP1 = 1e-6 Torr

Increasing ramping rate for TBHT to 1.0A/min

Wednesday, June 07, 2017, 12:10 

TGHT = 350A, 5.26V

TBHT = 230A, 3.99V

IGP1 = 7.0e-7 Torr

IGP2 = 8.3e-7 Torr

OMEGA = 1600C

Vacuum stable.

Increasing max setpoint of TGHT to 400A

Re-initiating ramping rate of TGHT at 1.0A/min

 Wednesday, June 07, 2017, 15:42

Tapped up to reach final desired temperature.

TGHT = 450A, 7.28V

TBHT = 230A, 4.02V

IGP1 = 9.0e-7 Torr

IGP2 = 1.07e-6 Torr

OMEGA = 1910C

Will remain at max setpoints overnight.

 Thursday, June 08, 2017, 08:51

Remained at max setpoints for 17hrs.

TGHT = 450A, 7.28V

TBHT = 230A, 4.02V

IGP1 = 2.6e-7 Torr

IGP2 = 2.9e-7 Torr

OMEGA = 1899C

Initiating auto-cool at 2.0A/min and 1.0A/min for the TGHT and TBHT respectively.

 Thursday, June 08, 2017, 16:28

 Vented in air and taken out this afternoon.

Container looks good!

Transferred into glove box.

 Tuesday, May 30, 2017, 14:36

Target consists of 400 discs.

Total packed length 2.9cm [exactly 8.05cm space on both sides]

Total mass 42.8228g [Incl foils + Ta wire on 4 packs]

Target consists of 320 single discs and 4x20 packs of Ta discs

Discs in target are arranged as follows: 80singles / 1pack / 80singles / 2packs / 80singles / 1pack / 80singles

3x Ta Heat shields.

No endcaps inserted, no Rh foil inserted.

Chamber currently pumping down.

TBHT will be ramped up to 230A at 1.0A/min.

TGHT will be ramped up to 350A at 2.0A/min.

Final desired temperature = 1900C

OMEGA slope = 0.98

Windows cleaned.

Vacuum limit stop at 3.0e-5 Torr, backing off at 4.0e-5 Torr.

 Wednesday, May 31, 2017, 09:47

HS water valves opened, no leaks detected.

Tapped up manually to 35A.

Vacuum stable.

IGP1 = 4.58e-7 Torr

IGP2 = 3.68e-7 Torr

Initiating auto ramp.

 Wednesday, May 31, 2017, 14:07

IGP1 = 1.11e-6 Torr

IGP2 = 1.13e-6 Torr

TGHT = 354A, 5.45V

TBHT =233A, 4.01V

OMEGA = 1565C

Increasing max setpoint to 400A at same ramping rate.

 Wednesday, May 31, 2017, 14:41

IGP1 = 1.19e-6 Torr

IGP2 = 1.24e-6 Torr

TGHT = 401A, 6.37V

OMEGA = 1708C

Increasing max setpoint to 425A at same ramping rate.

Wednesday, May 31, 2017, 15:51

Tapped up to ~1900C

TGHT = 480A, 7.85V

TBHT = 230A, 4.06V

OMEGA = 1912C

IGP1 = 1.85e-6 Torr

IGP2 = 2.06e-6 Torr

Will remain at max setpoints for a couple days before cooling

 Friday, June 02, 2017, 13:19

Remained at max setpoint for 2days

TGHT = 480A, 7.85V

TBHT = 230A, 4.06V

OMEGA = 1885C

IGP1 = 2.15e-7 Torr

IGP2 = 2.07e-7 Torr

Initiating auto-cool at 2.0A/min and 1.0A/min for the TGHT and TBHT respectively.

 Monday, June 05, 2017, 15:18

Vented in air and taken out this morning.

Target looks good 

 Wednesday, June 07, 2017, 15:41

Endcaps inserted.

Ta heat shield removed.

Rh foil inserted.

Handed off to assembly.

 Wednesday, February 28, 2018, 15:16

Container coated with TaC using 'flushing technique' and let dry.

Q-tip to plug ionizer became stuck in ionizer, removed manually with small drill bit.

Inspected ionizer with microscope, ionizer still good.

Cleaned ionizer tube with acetone.

Wrapped with 3 x Ta heat shields, incl center block

Currently pumping down in evap2

OMEGA slope = 0.98

Good vac at 3.0e-5, bad vac at 8.0e-5 Torr.

 Thursday, March 01, 2018, 10:06

HW water valves opened yesterday, no leaks detected.

IGP1 = 2.8e-7 Torr

Tapped up manually to 40A.

Waited ~3hrs

Vacuum stable.

IGP1 = 5.3e-7 Torr

IGP2 = 5.4e-7 Torr

Initiating auto ramp for TGHT @ 1.0A/min to a max setpoint of 350A

Initiating auto ramp for TBHT @ 0.5A/min to a max setpoint of 230A

Once max setpoints achieved, will tap up manually to final desired temperature of 1900C

 Thursday, March 01, 2018, 14:39

Vacuum started to climb very fast - auto-ramp was stopped.

Vacuum climbed up to IGP1 = 1.3e-4 Torr

Tapped TGHT back down to 80A from 90A, TBHT down to 50A from 60A.

Waited ~40min.

Vacuum stable, IGP1 = 2.6e-6 Torr

Restarting auto-ramp.

 Thursday, March 01, 2018, 14:54

IGP1 = 2.1e-5 Torr

Vacuum climbing quite rapidly again, stopped auto-ramp and vacuum started to drop right away.

TGHT = 100A

TBHT = 56A

Waited ~10min

IGP1 = 6.0e-6 Torr

IGP2 = 5.2e-6 Torr

Decreasing ramping rate to 0.5A/min and 0.2A/min for the TGHT and TBHT respectively, and re-initiating auto-ramp.

 Friday, March 02, 2018, 10:18

TGHT = 350A, 5.61V

TBHT = 230A, 4.04V

IGP1 = 4.3e-7 Torr

IGP2 = 3.8e-7 Torr

OMEGA = 1624C

Vacuum stable.

Increasing max setpoint of TGHT to 400A

Re-initiating auto-ramp of TGHT.

 Friday, March 02, 2018, 11:04

TGHT = 372A, 6.05V

IGP1 = 5.0e-7 Torr

Increasing ramping rate for TGHT to 1.0A/min

 Friday, March 02, 2018, 11:44

TGHT = 400A, 6.60V

IGP1 = 6.9e-7 Torr

OMEGA = 1780C

Vacuum stable.

Increasing max setpoint of TGHT to 430A

Re-initiating auto-ramp of TGHT.

 Friday, March 02, 2018, 12:17

TGHT = 430A, 7.22V

OMEGA = 1866C

IGP1 = 9.5e-7 Torr

Tapped up manually to OMEGA = 1910C

TGHT = 445A, 7.57V

TBHT = 230A, 4.07V

IGP1 = 1.1e-6 Torr

IGP2 = 9.9e-7 Torr

 Monday, March 05, 2018, 08:41

Remained at max setpoints over the weekend.

TGHT = 445A, 7.47V

TBHT = 230A, 4.06V

IGP1 = 1.87e-7 Torr

IGP2 = 1.47e-7 Torr

OMEGA = 1894C

Initiating auto-cool at 2.0A/min and 1.0A/min for the TGHT and TBHT respectively.

 Tuesday, March 20, 2018, 14:53

Vented in air.

Container was transferred to glove box for loading ~1 week ago

Container looks good.

 Thursday, December 01, 2016, 16:06

Container coated with TaC using 'flushing technique' and let dry overnight.

Cleaned ionizer tube with acetone, no coating inside ionizer tube

Wrapped with 3 x Ta heat shields, incl center block

Currently pumping down in evap2

OMEGA slope = 0.98

 Friday, December 02, 2016, 11:24

Opened up HS water valves, no leaks detected.

Tapped up manually to 35A.

Waited ~25min, vacuum stable.

IGP1 = 1.65e-6 Torr

Initiating auto-ramp at 0.2A/min for the TGHT and 0.1A/min for the TBHT.

Max setpoints set for 350A and 230A for the TGHT and TBHT respectively.

Once max setpoints achieved, will tap up manually to final desired temperature of 1900C

 Monday, December 05, 2016, 09:38

TGHT = 350A, 5.38V

TBHT = 230A, 4.03V

OMEGA = 1550C

IGP1 = 3.2e-7 Torr

Tapping up to 1900C...

 Monday, December 05, 2016, 14:11

OMEGA = 1905C

TGHT = 475A, 7.63V

TBHT = 230A, 4.07V

IGP1 = 8.5e-7 Torr

 Tuesday, December 06, 2016, 08:41

TGHT = 475A, 7.76V

TBHT = 230A, 4.07V

IGP1 = 3.9e-7 Torr

Initiating auto-cool at 2.0A/min and 1.0A/min for the TGHT and TBHT respectively.

Wednesday, December 07, 2016, 08:46 

Evap2 was vented in air and opened up yesterday afternoon.

Container looks good, coating fully sintered.

 Friday, September 15, 2017, 09:44

Target consists of 470 discs.

Total packed length 3.4cm [exactly 7.8cm space on both sides]

Total mass g [Incl foils + Ta wire on 6 packs]

Target consists of 350 single discs and 6x20 packs of Ta discs

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

1 long Ta Heat shield on each side, not incl center block.

No endcaps inserted, no Rh foil inserted.

Loaded into evap2 yesterday.

Chamber pumped down overnight.

TBHT will be ramped up to 230A at 1.0A/min.

TGHT will be ramped up to 650A at 2.0A/min.

Final desired temperature = 1900C

OMEGA slope = 0.98

HS water valves were already open.

Tapped up manually to 40A, vacuum stable.

IGP1 = 1.1e-6 Torr

IGP2 = 7.8e-7 Torr

Initiating auto-ramp.

Vacuum limit stop at 3.0e-5 Torr, backing off at 4.0e-5 Torr.

 Monday, September 18, 2017, 08:38

TGHT = 647A, 10.04V

TBHT = 233A, 3.51V

IGP1 = 4.65e-7 Torr

IGP2 = 3.78e-7 Torr

OMEGA = 1700C

Increasing max setpoint of TGHT to 750A

 Monday, September 18, 2017, 14:49

TGHT = 760A, 11.96V

TBHT = 233A, 3.54V

IGP1 = 8.9e-7 Torr

IGP2 = 8.6e-7 Torr

OMEGA = 1905C

Conditioning process complete.

Initiating auto-cool at 2.0A/min for the TGHT and 1.0A/min for the TBHT.

 Tuesday, September 19, 2017, 10:38

Target was cooled down in sections so Yasser could take some temperature measurements with his thermocouples.

Vented in air and removed from evap2 this morning.

Target looks good.

Endcaps inserted and expanded.

Inserting Rh foil this afternoon.

 Tuesday, September 26, 2017, 10:53

Tapped up manually to 230A over the course of ~35min.

TBHT striptool = 228A, 0.33V

TBHT direct readout = 230.4A, 0.33V

Vacuum good/ stable.

Minor spike to IGP1 = 1.5e-5 Torr ~5min after reached max setpoint of 230A.

IGP1 striptool = 3e-6 Torr

IGP1 direct readout = 3.79e-6 mBar

Initiating auto-cool at 2.0A/min.

Tuesday, February 21, 2017, 15:19

Container coated with TaC using 'flushing technique' and let dry overnight.

Cleaned ionizer tube with acetone, no coating inside ionizer tube

Wrapped with 3 x Ta heat shields, incl center block

Currently pumping down in evap2

OMEGA slope = 0.98

Good vac at 3.0e-5, bad vac at 4.0e-5 Torr.

 Wednesday, February 22, 2017, 09:41

HS water valves opened, no leaks detected.

Tapped up manually to 35A

Waited ~45min

Vacuum stable.

IGP1 = 1.2e-6 Torr

Initiating auto ramp for TGHT @ 0.2A/min to a max setpoint of 350A

Initiating auto ramp for TBHT @ 0.1A/min to a max setpoint of 230A

Once max setpoints achieved, will tap up manually to final desired temperature of 1900C

Friday, February 24, 2017 by Anders

Continue manually to 1900 C

Friday, February 24, 2017, 16:24: TGHT at 400 A 6.35V IG1 = 4.5e-7 Torr 1660 C

Friday, February 24, 2017, 16:57: TGHT at 410 A 6.6 V IG1 = 5.0e-7 Torr 1700 C

Sunday, February 26, 2017 by Anders

Sunday, February 26, 2017, 14:13: TGHT at 425 A 6.9 V IG1 = 2.5e-7 Torr 

Lab closed for weekend. No access to temp reading.

 Monday, February 27, 2017, 16:12

Tapped up manually to 1900C this morning.

TGHT = 490A, 8.14V

TBHT = 230A, 2.98V

MIKRON = 1911C

OMEGA = 1904C

evap2 has remained at max setpoints for ~6hrs

Initiating auto-cool at 2.0A/min and 1.0A/min for the TGHT and TBHT respectively.

 Tuesday, February 28, 2017, 11:57

Container finished sintering.

Vented in air and opened up this morning.

Container looks good 

Saturday, February 13, 2021, 08:10

Ta boat loaded with 80 discs enclosed in graphite foil in pockets of 20.  Sample A at both ends and sample B in the middle spaced out. Boat wrapped in Ta heat-shields (3 layers).

(A B B A)

Desired temperature= 1800C (expected TGHT approx 410 A).

good vacuum = 3.00 e-05 Torr

bad vacuum = 5.00 e-05 Torr

Evap2 left to pump down over previous night.

IGP1= 5.4e-7 Torr and stable

Initiating TGHT ramp up at 1 A/ min to 30 A

Saturday, February 13, 2021, 12:19

IGP1= 6.9e-06 Torr

Ramp to 50 A 1A/min

Saturday, February 13, 2021, 14:35

IGP1 = 6.4e-6 Torr

Pressure trending down. 

Saturday, February 13, 2021, 14:56

IGP1= 4.9 e-6 Torr

Initiate Ramp up @ 1 A/min to 400 A

Changed ramp up to 0.5 A/min at around 11:30 pm

Sunday, February 14, 2021, 11:43

The current will be ramped up to 420 A according to the trendline approximation (see attachement 1)

Sunday, February 14, 2021, 12:26

IGP1 = 8.9 e-06 Torr and trending down

TGHT = 420 A, 7.5 V

OMEGA = 1730 C

Will ramp up to 428 A manually 

Sunday, February 14, 2021, 12:30

Reached 428 A on TGHT.  

OMEGA = 1760 C

Will bump to 430 A and hold for 4 hours

OMEGA= 1765 C

Sunday, February 14, 2021, 18:00

OMEGA = 1789 C

IGP1= 7.5 e -7 Torr

TGHT = 430.5 A , 7.8 V

Start ramping down at -1A/min to zero A

 Tuesday, November 21, 2017, 12:01

Boat coated with TaC using 'flushing technique' and let dry overnight.

Wrapped with 1 long Ta heat shield 3x

Loaded into evap2 just before lunch

IGP1 = 7.1e-6 Torr

OMEGA slope = 0.98

Good vac at 3.0e-4, bad vac at 8.0e-4 Torr.

HS water valves have remained open since the last time evap2 was used.

No leak check done.

Tapped up manually to 35A.

Waited ~25min

Vacuum stable.

IGP1 = 1.15e-5 Torr

IGP2 = 1.17e-5 Torr

Initiating auto ramp for TGHT @ 0.2A/min to a max setpoint of 300A

Once max setpoints achieved, will tap up manually to final desired temperature of 1900C

 Wednesday, November 22, 2017, 09:32

TGHT = 270A, 4.15V

OMEGA = 1285C

IGP1 = 1.23e-6 Torr

IGP2 = 1.13e-6 Torr

Vacuum stable.

Increasing ramping rate to 1.0A/min and final setpoint to 350A

 Wednesday, November 22, 2017, 10:25

TGHT = 325A, 5.15V

OMEGA = 1500C

IGP1 = 2.80e-6 Torr

IGP2 = 2.93e-6 Torr

Vacuum stable.

Increasing ramping rate to 1.5A/min and final setpoint to 400A

 Wednesday, November 22, 2017, 10:49

TGHT = 350A, 5.60V

OMEGA = 1580C

IGP1 = 4.5e-6 Torr

IGP2 = 4.9e-6 Torr

Vacuum stable.

Increasing ramping rate to 2.0A/min

 Wednesday, November 22, 2017, 11:18

TGHT = 400A, 6.64V

OMEGA = 1734C

IGP1 = 5.8e-6 Torr

IGP2 = 6.2e-6 Torr

Vacuum stable.

Increasing final setpoint to 450A.

 Wednesday, November 22, 2017, 15:59

TGHT = 460A, 8.07V

OMEGA = 1898C

IGP1 = 1.34e-6 Torr

IGP2 = 1.27e-6 Torr

Sintering process complete.

Remained at max setpoints for just over 4hrs.

Initiating auto-cool at 2.0A/min.

 Thursday, November 23, 2017, 13:09

Removed from evap2 this morning.

Coating looks good.

 Thursday, November 23, 2017, 14:54

Graphite insert loaded into previously TaC coated target boat.

One endcap removed to allow for outgassing: left side out, right side in.

Weight of graphite tube + single endcap = 10.2012g

Same Ta heats shields remain on container from sintering TaC coating.

Currently pumping down in evap2.

Friday, November 24, 2017, 11:31

IGP1 = 4.52e-7 Torr

IGP2 = 3.43e-7 Torr

OMEGA slope = 0.98

Good vac at 3.0e-4, bad vac at 8.0e-4 Torr.

HS water valves have remained open since the last time evap2 was used.

No leak check done.

Tapped up manually to 50A.

Vacuum stable.

IGP1 = 5.34e-7 Torr

IGP2 = 5.54e-7 Torr

Initiating auto ramp for TGHT @ 0.2A/min to a max setpoint of 300A

Once max setpoints achieved, will tap up manually to final desired temperature of 2000C

Uranium targets go to a max temperature of 1950C online, so graphite insert should be tested to 2000C

 Monday, November 27, 2017, 10:15

IGP1 = 2.5e-7 Torr

IGP2 = 1.9e-7 Torr

Reached 300A, 4.61V

OMEGA = 1298C

Tapped up manually to 485A, 8.46V

OMEGA = 1808C

Remained at this setpoint for a day

Tuesday, November 28, 2017, 15:41 

IGP1 = 3.88e-7 Torr

IGP2 = 3.58e-7 Torr

Tapping up to 2000C...

Tuesday, November 28, 2017, 16:10 

TGHT = 570A, 10.20V

OMEGA = 2005C

IGP1 = 9.64e-7 Torr

IGP2 = 1.05e-6 Torr

There was a minor drop in voltage at 540A, 9.58V - dropped to ~9.4V then slowly went back up to 9.58V [see photo]

Will remain at this setpoint overnight and cool down in the a.m.

 Wednesday, November 29, 2017, 08:48

Voltage increased slowly while sitting at max setpoint of 570A [see photo]

TGHT = 570A, 11.20V --> voltage increased by 1.0V over ~16.5hrs

OMEGA = 2114C

IGP1 = 6.6e-7 Torr

IGP2 = 6.5e-7 Torr

Initiating auto-cool at 2.0A/min

 Wednesday, November 29, 2017, 16:15

Vented in air and removed today.

Will update tomorrow with results and photos.