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

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)

Sunday, March 12, 2023, 08:04

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

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

Evap 2 will be pumped down over previous night

OMEGA slope= 0.990

Good vacuum = 5.00 e-4 Torr

Bad vacuum = 5.00 e-2 Torr

IGP1=1.9 e-07 Torr

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

OMEGA target temp = 1850 C

Sunday, March 12, 2023, 13:08

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

from 320A, 4.5 V on TGHT

IGP1= 6.8e-07 Torr

Sunday, March 12, 2023, 19:09

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

@687A, 10.7 V TGHT OMEGA = 1850 C

final pressure IGP1= 2.4e-06 Torr

Monday, March 13, 2023, 22:28

Total number of foils:380 ( including 5 analysis discs on the front side of the container)

Total length packed 17 cm (excluding 5 analysis discs that will be removed)

container has 4 Ta heat shields (one inner only around fins)

No endcaps inserted to facilitate out-gassing

Ta coated spring at  both ends

ramp to 500A @ 1A/min TGHT and to 230A on TBHT

max approx 700A on TGHT and 230A on TBHT (Omega slope set = 0.990)

Then temperature = 1800 C.  Will ramp to 1820 C

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

Good vac at 5.00 e -4 Torr

Bad vac at 5.00 e-2 Torr

 IGP1= 2.8e-06 Torr at start of initial ramp.

Tuesday, March 14, 2023, 07:26  

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

Tuesday, March 14, 2023, 09:53

At 743A, 11.8V TGHT

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

Tuesday, March 14, 2023, 14:00

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

Final IGP1= 5.5e-06 Torr

OMEGA= 1750C

TBHT= 230A, 3.3V

Thursday, 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

Tuesday, August 15, 2023, 10:48

The coated container was wrapped in 4 Ta foil heatshields.

Target temperature on OMEGA= 1850-1900 C

OMEGA slope:= 0.990

Target time at max temperature = 4 hours

Final Current TBHT= N/A

Final TGHT current= ~400A (adjustable)

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

Then at 4A/min  to 100 A.

Good vacuum = 5.0 e-04 Torr

Bad vacuum = 5.0E-02 Torr

 IGP1 initial =8.9e-06 Torr

 Tuesday, August 15, 2023, 13:00

Tuesday, August 15, 2023, 13:00

Pressure stabilizing @8.8e-06 Torr

starting 2A/30s ramp to 400 A

Tuesday, August 15, 2023, 14:02

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

OMEGA = 1855

IGP1= 1.5e-05 Torr

Leave for 4 hours

Tuesday, August 15, 2023, 15:05

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

OMEGA increased to 1842C

Tuesday, August 15, 2023, 17:59

OMEGA = 1823C

TGHT= RD 338A, 5.9V   SET= 345A

IGP1= 4.0e-06 Torr

Start rampdown at -2A/min

Tuesday, August 22, 2023, 09:29

The coated container was wrapped in 4 Ta foil heatshields.

Target temperature on OMEGA= 1850-1900 C

OMEGA slope:= 0.990

Target time at max temperature = 2 hours

Final Current TBHT= N/A

Final TGHT current= ~400A (adjustable)

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

Then at 4A/min  to =400 A.

Good vacuum = 5.0 e-04 Torr

Bad vacuum = 5.0E-02 Torr

 IGP1 initial =2.2e-06 Torr

 Tuesday, August 22, 2023, 10:25

IGP1= 2.31e-06 Torr

TGHT 98.0 A (RD), 1.35 V

Start ramping at 2A/min to 400A

Tuesday, August 22, 2023, 11:54

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

Tuesday, August 22, 2023, 14:07

1853C OMEGA

TGHT = 353 A, 6.2 V (RD)

IGP1= 2.88E-06 Torr

Starting ramp-down at -2A/min

Saturday, August 26, 2023, 09:37

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

Wednesday, February 07, 2024, 22:36

Ta container tube TaC coated, wrapped in 4 Ta foil heat-shields, and loaded with 320 D shaped discs in a 12mm graphite cartridge with usable 11mm

Endcaps on the graphite cartridge have holes for outgassing

initial heating @ 2A/min to 90 A then 1A/min to 120A TGHT

OMEGA slope = 0.99

Vacuum limits up to 400A: 5.0e-04 Torr -- 1.0e-02 Torr

Thursday, February 08, 2024, 06:18

Starting heat ramp tght

initial pressure = 8.1e-07 Torr IGP1

Thursday, February 08, 2024, 06:54

start of gasoff observed. paused ramp and will continue at 1A/min

Thursday, February 08, 2024, 07:24

lowered TGHT current to 75 A as pressure increasing too rapidly.  will leave at this current until pressure drops

Thursday, February 08, 2024, 09:11

continuing ramp to 120A on TGHT

Thursday, February 08, 2024, 09:24

Increasing ramp to 2A/min to 250A on TGHT

Thursday, February 08, 2024, 10:52

Increased ramp to 3A/min to 250A on TGHT

Thursday, February 08, 2024, 11:10

Everything looks good will continue to 300 A at 3A/min TGHT

Thursday, February 08, 2024, 11:33

Pausing heating at 285A, 4.8V TGHT

OMEGA reads 1430C

Will let pressure drop and then proceed ramping slowly @ 0.2A/min

Thursday, February 08, 2024, 13:53

IGP1= 2.4e-06 Torr

OMEGA = 1432 C

ramp at 0.2A/min towards 1550C

Thursday, February 08, 2024, 14:07

pressure very stable.  will increase to 0.4 A/min

Thursday, February 08, 2024, 15:24

increasing ramp rate to 1A/min

IGP1 = 2.5e-06 Torr

Thursday, February 08, 2024, 18:05

1900 C on OMEGA

will leave 3-4 hours depending on pressure

Thursday, February 08, 2024, 21:10

No additional pressure peaks observed and pressure on IGP1=  1.9e-06 Torr

TGHT= 460 A, 8.1V

OMEGA= 1860 C

ramp down at -2A/min

Wednesday, June 29, 2022, 10:07

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

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

Evap 2 will be pumped down over previous night

OMEGA slope= 0.990

Good vacuum = 3.00 e-4 Torr

Bad vacuum = 5.00 e-2 Torr

IGP1= 1.2 e-06 Torr

Start autoramp @2A/min to 80 A then autoramp heat @1A/min to 150 A.  Then autoramp TGHT to 675A and TBHT to 230A.1

Wednesday, June 29, 2022, 10:13

Chamber isolation performed and no change of pressure observed.

Water leak test performed and no pressure change detected.

Starting ramp up

Wednesday, June 29, 2022, 13:23

Ramping to 675A on TGHT and 230A on TBHT @ 2A/min

Ramped TGHT to 680A, 10.6V  and held for 4 hours

Wednesday, June 29, 2022, 21:52

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

Thursday, August 25, 2022, 10:06

Target container is loaded with 379 Discs of TiC for Target and 5 extra discs for analysis on left end

Target length = 12.5

3 Ta foil heatshields and on TaC coated Ta spring on right side

Total weight including heatshields and spring = 1551.4 g   Final total weight = 1545.5 g

Final power should be ~10988 Watt

TGHT ramp up to 820A, and TGHT to 300A at 0.1A/min.

IGP1= 7.7e-7 Torr

Good vacuum =3.0e-05 Torr

Bad vacuum = 5e-04 Torr

Initial TGHT and TBHT autoramped @1A/min to 50A

TBHT mas 230A

TGHT max depends on final power

Thursday, August 25, 2022, 11:17 

Start autoramp at 1A/min to 80A on both TGHT and TBHT

Thursday, August 25, 2022, 11:54 

leaving at 80A until pressure stops rising

Thursday, August 25, 2022, 22:29

left to autoramp to 230A TBHT and 750 A TGHT since approximately 2:00 pm

Will leave ramping @1A/min to 750 A on TGHT

TBHT currently at 230A

 Friday, August 26, 2022, 07:27

TGHT = 850A, 9.3V

Started autoramp to 850A at 1A/min for TGHT

TBHT held at 230A

OMEGA = 1584C

Friday, August 26, 2022, 09:34

Target running at ~820A, 13.1 V since 9

Cooling to start between 1:15 to 1:30 pm

OMEGA reads 1668 C at top current

current reading oscillates between 812A and 828A and 13.1V  to 13.2V.

Monday, August 29, 2022, 12:21

Cooling at -2A/min for TGHT and -1A/min TBHT started on time on Friday August 26th.

Target remained under vacuum after cooling, over the weekend.

Target removed this morning and looks good. 5 discs removed for analysis

 Thursday, September 02, 2021, 06:36

Ta 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=7.7e-07 Torr

Initiate autoramp to 50 A @ 1A/min

Thursday, September 02, 2021, 06:54 

Stopped autoramp after reading email about EF-12 trip and compressed air issue.  Reset to 0 A both TGHT and TBHT

Thursday, September 02, 2021, 12:01

Ispite of site compressed air issues, EVAP 2 has not tripped.  Will manually increase current to40A for both TGHT and TBHT.

IGP1= 1.06 E-06 Torr. 

Friday, September 03, 2021, 08:06

 IGP1= 7.2e-07 Torr

TGHT= 43A, 0.5 V

TBHT= 41A, 0.48 V

Start autoramp at 1A/min to 90A on both TGHT and TBHT

Friday, September 03, 2021, 10:22

IGP1= 1.55 e-06 Torr

TGHT = 90.1 A, 1.1 V

TBHT= 90.0 A, 1.2 V

Continue ramp up at 1A/min to 400 A for TGHT and 230A for TBHT 

Friday, September 03, 2021, 16:05

430A on TGHT will keep for four hours.  OMEGA = 1856 C but according to regression should be 1900.  will keep at this temp. 

Friday, September 03, 2021, 21:11

OMEGA has been at 1875C for 4 hours.  Will start ramp down @ -2A per minute for TGHT and -1A min for TBHT

TGHT = 430 A, 7.3 V   (current actually fluctuates between 428 and 433 A since new power supply

TBHT = 233A, 4.0V  (set to 230 but displays 233) 

Tuesday, March 02, 2021, 11:26 

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

Initial weight including heat-shields = 433.8 g

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

Evap 2 will be pumped down over night.

Good vacuum = 3.00 e-5 Torr

Bad vacuum = 5.00 e-5 Torr

Wednesday, March 03, 2021, 13:28

IGP1 = 4.0 e-7 Torr

Start ramping @ 1A/min to 20A on both TGHT and TBHT

Wednesday, March 03, 2021, 15:03

Start ramping @1/min to 60A on Both TGHT and TBHT

Wednesday, March 03, 2021, 22:42

TGHT = 60A, TBHT = 60A

IGP1= 4.2 e-7 stable

Start ramping to 400A @ .5A/min for TGHT and @0.5A/min for TBHT to 230A

Thursday, March 04, 2021, 11:56

TGHT = 400 A, TBHT =230A

IGP1= 1.9e-6 Torr

OMEGA = 1695 C

Continue ramp up @0.5A/min to 430A on TGHT

Thursday, March 04, 2021, 14:02

IGP1 = 1.87e-6 Torr

TGHT = 434 A , 7.2 V

OMEGA = 1787 C

Will tap up manually 450A @ on TGHT and leave at that current for ~4 hours

Thursday, March 04, 2021, 19:35

After ~ 5 hours at 1829 C max OMEGA reading

OMEGA = 815 C 

Start ramp down at 1A/min on TGHT and 0.8A/min for TBHT

IGP1= 1.2e-6 Torr

 Ta#62 LP-SIS target description: (REPLACEMENT FOR 44139-10)

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

Foil Thickness = 0.025mm

Target density = 14.29 g/cm3

Target length = 3.4 cm

Total Mass = 48.602 g [Incl foils + Ta wire on 6 packs]

Total mass w/ Target oven= 456 g (w/ end caps)

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

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

Wednesday, June 23, 2021, 17:46: Roughing.

Wednesday, June 23, 2021, 18:03: TP1 on.

Wednesday, June 23, 2021, 18:09: TP1 @ speed. Vacuum @ 1.53e-04T & dropping.

TBHT will be ramped up to 230A 

TGHT will be ramped up to 600A +

Final desired temperature = 1900C.

OMEGA slope = 0.98.

Thursday, June 24, 2021, 07:38: PS on.  

Thursday, June 24, 2021, 07:45: TGHT / TBHT tapped up to 10 A. Slope @ 0.98

Thursday, June 24, 2021, 07:46: Auto Ramping TGHT / TBHT to 350 / 150 A @ @ A per min.

Thursday, June 24, 2021, 10:47: TGHT / TBHT @ 350 / 150 A. Auto Ramping TGHT / TBHT to 580 / 230 A @ @ A per min. Temp @ 1120 C

Thursday, June 24, 2021, 12:59: TGHT / TBHT @ 580 / 230 A. Vacuum @ 8.24e-06T. Temp @ 1717 C. Auto-ramping TGHT to 600 A @ 2 A per min.   

Thursday, June 24, 2021, 13:10: Vacuum @ 8.83e-06T. Temp @ 1758 C. Auto-ramping TGHT to 620 A @ 2 A per min. 

Thursday, June 24, 2021, 13:21: Vacuum @ 1.0e-05T. Temp @ 1798 C. Auto-ramping TGHT to 645 A @ 2 A per min.  

Thursday, June 24, 2021, 13:37: Vacuum @ 1.15e-05T. Temp @ 1845 C. Tap up TGHT to 650 manually.

Thursday, June 24, 2021, 13:45: Vacuum @ 1.21e-05T. Temp @ 1875 C. Tap up TGHT to 665+ manually.

Thursday, June 24, 2021, 13:47: Vacuum @ 1.34e-05T. Temp @ 1901 C. Tapped up TGHT to 677 manually. Desired temperature reached.

Thursday, June 24, 2021, 13:51: Auto-cooling @ 2A per min 

Friday, June 25, 2021, 05:30: TP1 off. BP1 off.    

Friday, June 25, 2021, 07:36: Venting. 

 Wednesday, October 27, 2021, 11:07

Monday, October 25, 2021, 11:52

Ta LPSIS 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 will be pumped down over previous night

Good vacuum = 3.00 e-3 Torr

Bad vacuum = 5.00 e-2 Torr

Initial total weight = 464.8 g

Final weight after sintering = 

 Thursday, October 28, 2021, 07:46

IGP1= 7.4e-07 Torr

Initiating autoramp to 40 A on both TGHT and TBHT

ramp rate = 1 A/min

Will keep at 40A for approximately 1 hour or until pressure below 1e-05 Torr

 Thursday, October 28, 2021, 09:41

IGP1= 1.9e-06 Torr TGHT = 40.3 A, 0.48 V TBHT = 39.0 A, 0.48V

Autoramp @ 1A/min to 100A on both TGHT and TBHT

 Thursday, October 28, 2021, 12:57

IGP1= 1.1e-06 Torr

TGHT = 100 A, 1.3 V

TBHT = 100 A, 1.2 V

Start autoramp at 2A/min to 400 for TGHT and 230 for TBHT

The current from the plot (below) required to reach 1900 C seems too high.

Will take to 430 A as previous.  The slope was chequed previously.  Need to check OMEGA.

Thursday, October 28, 2021, 20:08

IGP1=  3.34 e-06 Torr

TGHT = 430A , 7.2 V

TBHT = 233A, 4.1V

OMEGA  = 1628C

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

	44691-3 TaC coating
		TGHT		TBHT			Temperature (C)	Current (A)
	Temperature ( C )	Voltage (V)	Current (A)	Voltage (V)	Current  (A)		1900	512.88
	1250	3.90	255.0				1700	434.06
	1302	4.30	279.0				1800	473.47
	1343	4.60	294.0
	1423	5.10	325.0
	1484	5.7	348.0
	1555	6.2	377.0
										Slope	2.537
										Y intercept	598.66
										R2	0.999

Thursday, August 05, 2021, 11:10

Total number of foils: 380

Total length packed 13.5 cm

container has 3 Ta heat shields.

No endcaps inserted to facilitate out-gassing

Two Ta discs at either end and three graphite discs as separators 

[Left end [ blade--no blade--blade---no blade]  Right 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 430A 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

Total weight into Evap2 =503.8 g

Friday, August 06, 2021, 11:33

IGP1= 8.3e-07 Torr

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

Friday, August 06, 2021, 22:34

 IGP1= 7.0e-06 Torr

TGHT= 50.1 A, 0.6 V    TBHT = 50.0A, 0.6V

Continue heating at 0.5A/min to 400A on TGHT and 230A on TBHT

Saturday, August 07, 2021, 10:11

Stopped autoramping.  Will allow some time at 63 A on both TGHT and TBHT

Saturday, August 07, 2021, 12:19

IGP1= 1.9e-05 Torr

Manually increase TGHT and TBHT to 65 A 

Saturday, August 07, 2021, 23:01

IGP1= 5.8e-06 Torr

TGHT= 64.5 A, 08V  TBHT=64.6A, 0.8V

Ramp up manually while monitoring pressure 

Sunday, August 08, 2021, 08:46

IGP1= 6.0e-06 Torr

TGHT = 69A, 0.85V  TBHT = 69A, 0.90V

ramp up manually  

Monday, August 09, 2021, 08:54 

IGP1= 1.38e-05 Torr

TGHT= 90.0 A, 1.1V, TBHT= 90.0A 1.3V

Start autoramp at 0.5 A/min on both TGHT and TBHT to 400A and 230A respectively.

Changed bad vacuum to 5e-04 Torr

Monday, August 09, 2021, 21:37

IGP1= 6.6e-06 Torr

TGHT= 300.3 A, 5.0 V, TBHT = 233.0 A, 4.1V

 Increase ramp rate to 2A/min for TGHT to 400 A,

OMEGA = 1430 C

Monday, August 09, 2021, 22:09

Will autoramp at 2A/min up to 424A as per regression line on attached file 

Monday, August 09, 2021, 22:58

Temperature drop on OMEGA.  Unexpected.  Will lower current on TGHT to 418A and keep there for 4 hours.  OMEGA may not be reliable 

Tuesday, August 10, 2021, 3:16

IGP1=8.8e-07 Torr

TGHT = 414A, 7.5V TBHT = 233A, 4.1V

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

Tuesday, August 10, 2021, 10:35

IGP1= 3.6e-07 Torr

Dismount

Some discs, especially end sections were coated with a golden layer.  

Thursday, September 01, 2022, 10:34

The coated container was wrapped in three 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 2A/min on both TGHT and TBHT to 40A

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

Good vacuum = 5.0 e-05 Torr

Bad vacuum = 5.0E-04 Torr

Thursday, September 01, 2022, 12:39

Has been stabilizing at 40A on both heaters.

Starting 1A/min autoramp to 80A

A discrepancy between setpoint and readback currents was observed for both TGHT and TBHT.  The difference is substancial and warrants investigation.  This process will be paused until further notice

Tuesday, September 06, 2022, 14:45

Controls has been troubleshooting EVAP2.  In the process TBHT has been damaged. Arthur will take a look at it ASAP and his group will try and fix it tomorrow. 

Regarding our initial problem, it appears that when an electrical safety box was installed, the copper water lines connected to output terminals of the power supply, were moved so that they were in contact with the evaporator cage.  See the figure below.

Thursday, September 08, 2022, 12:47

 Target has been removed and a new test target (HP-FEBIAD) has been placed inside.  System left to generate enough vacuum and then testing will be performed.

Friday, September 09, 2022, 15:58

System was tested and all seems good.  This coat/sintering will continue after conditioning of graphite material

Saturday, September 24, 2022, 09:13

Continuation of process. 

IGP1= 4.3e-07 Torr

ramping @ 1A/min to 230 A on both TGHt and TBHT

Saturday, September 24, 2022, 16:28

ramped to 430A, 7.2V on TGHT and 233A, 4.2V on TBHT.  Will leave until 7 pm.

Saturday, September 24, 2022, 19:44

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

camera offline

IGP1= 1.2e-6 Torr

Monday, September 26, 2022, 09:41

IGP1=2.2e-07 Torr.  Shutting off TBHT and TGHT.

Thursday, September 29, 2022, 09:53

Final notes: coating looks good .  Probably 3 hours at final temperature is better to prevent material degradation.

 Ta#64 LP-SIS target description: 

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

Foil Thickness = 0.0254mm (0.0010") Measured.

Target density = 12.005 g/cm3

Target length = 3.35 cm

Total Mass = 40.2166 g [Incl foils + Ta wire on 6 packs]

Total mass w/ Target oven= 446 g (w/ end caps)

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

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

Final desired temperature = 1900C.

Thursday, June 02, 2022, 16:49: Roughing 

Thursday, June 02, 2022, 17:02: OMEGA slope = 0.98. 

Thursday, June 02, 2022, 17:10: TP1 on.

Thursday, June 02, 2022, 17:21: TP1 is up to speed. PS on. 

Friday, June 03, 2022, 05:22: Auto-ramping TGHT / TBHT to 500 / 200 A @ 2 A per min. Vacuum @ 1.78e-06T.

Friday, June 03, 2022, 08:59: TGHT / TBHT @ 424 / 200 A. Vacuum @ 3.42e-06T. Temperature @ 1318 C. Auto ramp ongoing.

Friday, June 03, 2022, 09:40: TGHT / TBHT @ 500 / 200 A. Vacuum @ 4.47e-06T. Temperature @ 1469 C. Auto-ramping TGHT / TBHT to 580 / 230 A @ 2 A per min

Friday, June 03, 2022, 10:47: TGHT / TBHT @ 580 / 230 A. Vacuum @ 6.26e-06T. Temperature @ 1620 C. Auto-ramping TGHT to 600 @ 2 A per min 

Friday, June 03, 2022, 11:08: TGHT / TBHT @ 600 / 230 A. Vacuum @ 6.54e-06T. Temperature @ 1655 C. Auto-ramping TGHT to 630 @ 2 A per min  

Friday, June 03, 2022, 11:30: TGHT / TBHT @ 630 / 230 A. Vacuum @ 7.73e-06T. Temperature @ 1708 C. Auto-ramping TGHT to 650 @ 2 A per min

Friday, June 03, 2022, 11:45: TGHT / TBHT @ 650 / 230 A. Vacuum @ 8.32e-06T. Temperature @ 1748 C. Auto-ramping TGHT to 660 @ 2 A per min

Friday, June 03, 2022, 11:53: TGHT / TBHT @ 660 / 230 A. Vacuum @ 8.83e-06T. Temperature @ 1755 C. Auto-ramping TGHT to 670 @ 2 A per min

Friday, June 03, 2022, 12:05: TGHT / TBHT @ 670 / 230 A. Vacuum @ 9.03e-06T. Temperature @ 1780 C. Auto-ramping TGHT to 680 @ 2 A per min

Friday, June 03, 2022, 12:11: TGHT / TBHT @ 680 / 230 A. Vacuum @ 9.14e-06T. Temperature @ 1795 C. Auto-ramping TGHT to 700 @ 2 A per min 

Friday, June 03, 2022, 12:23: TGHT / TBHT @ 700 / 230 A. Vacuum @ 9.50e-06T. Temperature @ 1822 C. Auto-ramping TGHT to 720 @ 2 A per min

Friday, June 03, 2022, 12:29: TGHT / TBHT @ 720 / 230 A. Vacuum @ 1.00e-05T. Temperature @ 1853 C. Auto-ramping TGHT to 730 @ 2 A per min

Friday, June 03, 2022, 12:36: TGHT / TBHT @ 725 / 230 A. Vacuum @ 1.04e-05T. Temperature @ 1860 C. Manually tap up TGHT to reach desired temperature

Friday, June 03, 2022, 13:04: TGHT / TBHT @ 760 / 230 A. Vacuum @ 1.07e-05T. Temperature @ 1901 C. Desired temperature reached

Friday, June 03, 2022, 13:13: Auto-cooling at 2 A per min. 

Monday, June 06, 2022, 07:07: PS off. BV1 closed & TP1 off.

Monday, June 06, 2022, 08:47: Venting. 

Ta#63 LP-SIS target description: 

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

Foil Thickness = 0.025mm

Target density = 15.38 g/cm3

Target length = 3.4 cm

Total Mass = 52.296 g [Incl foils + Ta wire on 6 packs]

Total mass w/ Target oven= 457 g (w/ end caps)

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

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

https://elog.triumf.ca/TIS/Target+Production/114

TBHT will be ramped up to 230A 

TGHT will be ramped up to 600A +

Final desired temperature = 1900C.

OMEGA slope = 0.98.

Wednesday, November 10, 2021, 18:05: Roughing. 

Wednesday, November 10, 2021, 18:14: Omega Laser set. On end cap / ok. Slope = 0.980 

Wednesday, November 10, 2021, 18:24: Turbo pump on.

Wednesday, November 10, 2021, 18:25: RV1 valve hissing. Stop TP. Reset, open / close RV1 multiple times. Hissing stopped on its own. Won't affect the pump down, letting pressure out, not in. Will need to replace later.

Wednesday, November 10, 2021, 18:27: Turbo pump on. 

Wednesday, November 10, 2021, 18:32: TP ok. PS on. 

Thursday, November 11, 2021, 11:08: Vacuum @ 4.56e-07T. Auto ramping TGHT / TBHT to 580 / 230 A @ 2A per minute.

Thursday, November 11, 2021, 13:49: TGHT / TBHT @ 313 / 230 A. Vacuum @ 1.46e-06T. Temperature @ 1051 C. Auto ramp continues.

Thursday, November 11, 2021, 16:55: TGHT / TBHT @ 580 / 230 A. Vacuum @ 5.11e-06T. Temperature @ 1621 C. Auto ramp TGHT to 610 A @ 2 A per min.

Thursday, November 11, 2021, 17:13: TGHT / TBHT @ 610 / 230 A. Vacuum @ 6.54e-06T. Temperature @ 1670 C. Auto ramp TGHT to 630 A @ 2 A per min.

Thursday, November 11, 2021, 17:32: TGHT / TBHT @ 630 / 230 A. Vacuum @ 7.82e-06T. Temperature @ 1709 C. Auto ramp TGHT to 650 A @ 2 A per min. 

Thursday, November 11, 2021, 18:49: TGHT / TBHT @ 650 / 230 A. Vacuum @ 7.40e-06T. Temperature @ 1758 C. Auto ramp TGHT to 665 A @ 2 A per min. 

Thursday, November 11, 2021, 19:02: TGHT / TBHT @ 665 / 230 A. Vacuum @ 8.37e-06T. Temperature @ 1790 C. Auto ramp TGHT to 685 A @ 2 A per min. 

Thursday, November 11, 2021, 19:22: TGHT / TBHT @ 685 / 230 A. Vacuum @ 9.56e-06T. Temperature @ 1830 C. Auto ramp TGHT to 700 A @ 2 A per min. 

Thursday, November 11, 2021, 19:41: TGHT / TBHT @ 700 / 230 A. Vacuum @ 1.18e-05T. Temperature @ 1870 C. Manually tap up to 705 A

Thursday, November 11, 2021, 19:43: TGHT / TBHT @ 705 / 230 A. Vacuum @ 1.25e-05T. Temperature @ 1885 C. Manually tap up to 710 A

Thursday, November 11, 2021, 19:44: TGHT / TBHT @ 710 / 230 A. Vacuum @ 1.34e-05T. Temperature @ 1890 C. Manually tap up to 715 A 

Thursday, November 11, 2021, 19:46: TGHT / TBHT @ 715 / 230 A. Vacuum @ 1.75e-05T. Temperature @ 1898 C. Manually tap up to 717 A

Thursday, November 11, 2021, 19:46: TGHT @ 717 A. Temperature @ 1901 C. Temperature reached.

Thursday, November 11, 2021, 19:48: Begin auto-cooling @ 2 A per min.

Friday, November 12, 2021, 06:13: PS off. TP1 off. 

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

Note:  placed tantalum foil heatshield on both sides of the copper heatshield assembly.

Desired temperature = 1800 C (expected TGHT ~430 A), TBHT will be set fixed at 230A (max).

Evap 2 was pumped down yesterday

Good vacuum = 3.00 e-03Torr

Bad vacuum = 5.00 e-02 Torr

Wednesday, November 03, 2021, 09:27

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

IGP1 initial:  5.3 e-07 Torr

Wednesday, November 03, 2021, 10:22

IGP1= 1.1 e-05 Torr

TGHT = 40 A, 0.5 V 

TBHT= 38.5 A, 0.41 V

Will keep while monitoring pressure at 0.5 A/min to 60A

Wednesday, November 03, 2021, 10:35

IGP1 pressure trending down

IGP1= 6.7 e-06 Torr 

Start ramp up to 60A at 0.5A/min

Wednesday, November 03, 2021, 11:24

IGP1 2.6 e-06 Torr and trending down

Start ramp up to 400A on TGHT and 230A on TBHT at 1A/min

Wednesday, November 03, 2021, 13:28 

 IGP1= 1.4e-05 Torr and trending down slowly.  Will increase ramp speed to 1.5A/min on both TGHT and TBHT to the same final current as before.

Wednesday, November 03, 2021, 15:56 

 IGP1= 2.1 e-05 Torr

TGHT = 400 A,  6.9 V

TBHT = 233 A, 4.1 V

 OMEGA = 1645 C

Will manually ramp up to 1800 C

Wednesday, November 03, 2021, 16:43 

 TGHT = 450 A, 7.9 V

TBHT = 233 A, 4.1 V

OMEGA = 1770 C

IGP1 increasing in Pressure.  Will leave for 4 hours at this current.

Wednesday, November 03, 2021, 20:48

IGP1= 1.0 e-05 Torr

TBHT= 233A, 4.1 V

TGHT = 450 A, 7.9 V

OMEGA = 1751 C

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

 Friday, March 05, 2021, 10:47

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

Initial weight including heat-shields = 431.0 g

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

Evap 2 will be pumped down over night.

Good vacuum = 3.00 e-5 Torr

Bad vacuum = 5.00 e-5 Torr

 Saturday, March 06, 2021, 10:29

IGP1= 2.7 e-07 Torr and stable

AutoRamp at 1A/min to 40 A on TGHT and TBHT

Saturday, March 06, 2021, 22:36

IGP1= 2.2e-07 Torr

TGHT = 40.3 A, .46V

TBHT = 38.48 A, .48 V  (set to 40 A)

Start Autoramp at 0.5A/min to 400 A on TGHT and 230A on TBHT

Sunday, March 07, 2021, 07:48

IGP1=8.5e-7 Torr

TGHT = 287 A, 4.6V

TBHT = 232 A, 4.0 V

OMEGA = 1493C

 Increase ramp speed on TGHT to 2A/min to 400A

Sunday, March 07, 2021, 08:36 

 IGP1=1.7 e-06 Torr

TGHT = 373.7 A, 6.3V

TBHT = 232.9 A, 4.1 V

OMEGA = 1752 C

Sunday, March 07, 2021, 08:53

 IGP1= 1.7e-06 Torr

TGHT = 400 A, 6.8 V

TBHT = 232.8 A, 4.1 V

OMEGA= 1842

Ramp TGHT @ 2A/min to 420 A as per attached current approximation

Sunday, March 07, 2021, 09:25

OMEGA=1915 C

TGHT = 420A, 7.2V

TBHT= 232.8 A, 4.1V

IGP1= 1.6 e-06 Torr

Tap down manually to approx 1900 C

TGHT = 412.9 A, 7.0 V and OMEGA=1900 C

Will leave for about 4 hours at this temperature

Sunday, March 07, 2021, 13:05

IGP1= 1.1 e-06 Torr

TGHT = 415 A, 7.2 V

TBHT = 232.8 A, 4.1 V

OMEGA = 1880C

Start cool down at -2A/min on TGHT and -1A/min TBHT