Friday, August 30, 2024, 11:31

The coated container was wrapped in 4 Ta foil heatshields.

Vacuum IGP1 initial =3.1 e-07 Torr

Target temperature on OMEGA= 1850-1900 C

OMEGA slope:= 0.990

Target time at max temperature = 4 hours

Final Current TBHT= 230 A

Final TGHT current= ~400A (adjustable)

Heating autoramp starged at 1A/min on  TGHT  100A and TBHT

Then at 1A/min  to =400 A TGHT and 230A TBHT

Good vacuum = 5.0 e-04 Torr

Bad vacuum = 5.0E-02 Torr

note: Left TBHT hole is off from center by a good margin

Sunday, September 01, 2024, 07:32

Starting initial ramp at 1A/min to 50A

Sunday, September 01, 2024, 15:20

have ramped ;up at 1A/min on both TGHT and TBHT but had two issues.

1) Set current and readback current have discrepancies but the TBHT discrepancy is significant (TBHT Set at 188 while RD is 231.9 A @ 1.9V)

   TGHT also has odd behavior with set point 405 giving 392A RD and 0.067V.  Will hold until 430pm before starting ramp down

Sunday, September 01, 2024, 16:30

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

Note: OMEGA not able to give any reasonable readings

Tuesday, September 03, 2024, 13:51

After troubleshooting EVAP2 it was found that a copper line was touching the metal encasement grid most likely resulting in a short.  A short was seeing and it disappeared after moving the copper line away from the grid.  

Upon restarting on epics the PS went to maximum current and it was shut off after 30seconds to a minute.  The system was checked again by Arthur and TGHT was manually increased to 5A and then set to Zero again.  Arthur thinks that the PS probably requires this step after switching from local controls to remote.  Will start the sintering again as the container is coated but not sintered.

Tuesday, September 03, 2024, 14:03

ramping at 1A/min on both TGHT and TBHT to 90A. 

Tuesday, September 03, 2024, 22:25  

Started rampdown at -2A/min TGHT and -1A/min TBHT.  HIgh temperature from OMEGA was 1825 C at 430A readback on TGHT.