Monday, November 28, 2022, 05:58
Left weekend to pump down
current IGPI= 7.23e-7 Torr
Material will be reduced in LP-SIS wrapped with 3 Ta foils.
a cap was installed to collect material coming out from the ionizer tube
Initial weight of target material plus cartridge was recorded
All relevant data and findings will be reported and added to docushare as document :
Good vacuum = 5e-4 Torr
Bad vacuum = 5e-2 Torr
Power desired 1900W as approximate power used online.
Will autoramp @2A/min to 30A, then slow down ramp to 1A/min to 120A.
After first pressure bump cleared, will ramp up to 400 A @ 2A/20s to 425A on TGHT. TBHT will be topped off at 230A.
from 425A, TGHT will be ramped at 1A/min and monitored for pressure behaeviour.
sytem will be left at reduction current for 4 hours. Then, the current will be dropped to 425 A and allow to run for 8 hours.
The cup will be collected and the system will be run again for two hours. at the same current until no material visible on cap. Then it will be run at 450A for increments of two hours until no significant mass change of target material.
Monday, November 28, 2022, 06:05
started initial heating to 30A at 2A/min on both TGHT and TBHT.
Monday, November 28, 2022, 08:46
was ramping at 6A/min (2A/20s) on both tGHT and TBHT but aborted due to pressure spike. will allow pressure to stabilize.
TGHT = 162A, 1.35V
TBH 162A, 1.9V
Monday, November 28, 2022, 08:51
Restarting the heating at 6A/min (2A/20s)
Monday, November 28, 2022, 09:21
Pausing heating @ TGHT= 323 A 3.0V
Allow pressure to stabilize to better spot reduction current
Monday, November 28, 2022, 09:49
Started heating TGHT at 2A/min so reduction current can be better resolved
Monday, November 28, 2022, 10:12
heating aborted to allow pressure to stabilize
IGP1> 5.0e-4 Torr
Monday, November 28, 2022, 11:31
IGP1= 1.5e-4 Torr start autoramp TGHT @1A/min
Monday, November 28, 2022, 11:51
paused heating. Second peak has been passed. Will let pressure drop before starting heating again to try and better observe reduction peak.
Monday, November 28, 2022, 12:46
start autoramp at 2A/min from 389A on TGHT
IGP1- 6.4e-6 Torr
Monday, November 28, 2022, 14:21
Pressure starts to drop at around 535A, but large bump observed around 386A.
Will leave four hours.
TGHT= 539A, 4.98V
TBHT= 229A, 2.9V
Monday, November 28, 2022, 18:19
Ramping down at 4A/min to 425A
Currently IGP1= 6.2e-6 Torr
TGHT = 539A, 4.98 V
TBHT= 230A, 2.98V
Monday, November 28, 2022, 22:23
425 A on TGHT reached at 6:50 pm. Will ramp down at 2:50 am . -2A/min TGHT and -1A/min TBHT
Tuesday, November 29, 2022, 09:34
Final IGP1 when TGHT and TBHT = 0A is 5.0e-7 Torr
Tuesday, November 29, 2022, 14:08
Weighed materials and reloaded
Currently at 1.1 e-05 Torr
Will initiate heat ramp at 2A/min to 425 A
@241A increase ramp rate to 4A/min on TGHT
Wednesday, November 30, 2022, 12:44
heating B finished and cartridge loading for heating C
Current pressure = 2.09 E-05 Torr. Will ramp up to 450A at 4A/min and regulate as needed.
Will heat at 450A TGHT for 2 hours, TBHT max= 230A
Wednesday, November 30, 2022, 16:30
Starting rampdown @-2A/min TGHT and -1A/min TBHT
Final heating was @ 450A, 4.0V TGHT and 230A, 2.7V TBHT
Friday, December 02, 2022, 09:00
IGP1= 7.2 e-07 Torr
Starting ramp at 2A/min to 450A on TGHT and 230A on TBHT
Friday, December 02, 2022, 10:02
pressure stated dropping. Will increase ramp to 4A/min (2A/30s)
Friday, December 02, 2022, 15:35
Starting ramp down at -2A/min TGHT and -1A/min TBHT
IGP1= 2.6 e-06 Torr
TGHT 450A 4.2V
TBHT 230A 2.9V
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