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.