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.
|