Tuesday, November 01, 2022, 17:24
2 samples of np-TiO2/C fibres were produced using the e-spinner. Each sample was wrapped with a piece of graphite sheet, and then loaded into a target container.
Sample will be heated to 1700 C.
TGHT will be autoramped to 450 A; this should be close to 1600 C. (see elog#596)
Good vacuum: 3e-5 Torr
Bad vacuum: 5e-5 Torr
Omega slope: 0.99
Initiate autoramp: 1 A/min
Chamber has been pumped down below 4.2e-6 Torr.
Tuesday, November 01, 2022, 22:46
Pressure currently at 6.4e-7 Torr.
Initiated auto-ramping
Wednesday, November 02, 2022, 09:37
TGHT was ramped up to 448A (readback 445-452A / 8.05V - 8.11V). The voltage is much higher than the last process, see elog #596.
Temperature is much higher at this current, reading at 1870 - 1872 C.
Will keep at this setting for now and continue to monitor.
See attachment#1 for the TGHT-Pressure plot.
Wednesday, November 02, 2022, 21:35
Samples have been heated for over 16 hours; temp has been stabilized at 1875 C, vacuum at 7.3 e-7 Torr.
Initiated cooling at 1A/min.
Chamber will be vented tomorrow morning.
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