Re-salted. PE removed. EE Cleaned
Monday, February 08, 2021, 09:17: Roughing.
Monday, February 08, 2021, 09:46: TP1B on
Monday, February 08, 2021, 11:45: Vacuum @ 6.70e-06T. Open waterlines
Monday, February 08, 2021, 11:49: Vacuum spike. Turn off IG1 & turbo pumps. Will vent to swap gaskets.
Monday, February 08, 2021, 12:45: Venting.
Swap & tighten.
Monday, February 08, 2021, 13:33: Roughing
Monday, February 08, 2021, 14:01: TP1B on.
Monday, February 08, 2021, 14:18: TP1A on.
Monday, February 08, 2021, 14:22: Opened waterline. Vacuum was in the e-05T range and dropping however it slowed and a spike was noted on CG1A & CG1B. Turbo pumps off to vent. Will inspect the seal face.
Monday, February 08, 2021, 15:08: Venting.
Monday, February 08, 2021, 15:57: Swapped out gaskets. Checked gasket faces & Re-installed HS. Roughing.
Monday, February 08, 2021, 16:44: TP1B on.
Monday, February 08, 2021, 16:51: TP1A on.
Monday, February 08, 2021, 16:58: IG1 on
Monday, February 08, 2021, 17:00: Opened waterlines. Backing pressure ok, Vacuum continuing to improve@ 7.90e-05T.
Monday, February 08, 2021, 17:03: Power/sources on. vacuum @ 5.19e-05T
FM
Tuesday, February 09, 2021, 00:46: IG1 @ 2.14e-6T. Auto-ramping to 580/230 @ 2A/min
Tuesday, February 09, 2021, 07:17. Anode got current limited again when TBHT/TGHGT were @ 215/215 A.
AS
Tuesday, February 09, 2021, 08:32: BIAS / EE / EZL @ 20 / -1.5 / 10 kV
Tuesday, February 09, 2021, 09:02: BIAS / EE / EZL @ 30 / -2.0 / 13 kV
Tuesday, February 09, 2021, 09:16: BIAS remains @ 30 kV. Adjusting Optics, EE, & EZL to tune. Minimal beam on FC0 noted.
Tuesday, February 09, 2021, 10:02: HV off. Check Anode & down stream.
Tuesday, February 09, 2021, 10:36: Auto-cooling @ 4 A per min
Tuesday, February 09, 2021, 10:40: Aborted. TGHT / TBHT back to 580 / 230 A. A few more checks.
Tuesday, February 09, 2021, 10:58: Auto-cooling @ 4 A per min
Tuesday, February 09, 2021, 11:08: HV off.
Tuesday, February 09, 2021, 13:41: Power / sources off. FS#5 closed off. Turbo pumps off.
FM.
After inspecting the ion source, and revising the electrical connections, I suspect that the TBHT was floating all the time and only when it was in contact with the plasma electrode it held HV.
When the plasma electrode was removed, there was no reference whatsoever, and the ions were not extracted.
It seems then that the resistor R4 (ISK4562D) is necessary to provide a reference to the TBHT in a similar way R1 provides one to extraction electrode.
Tuesday, February 09, 2021, 20:52: Installing R4. If the anode works this time, it will be worth checking why this reference is necessary. From the electric diagram, the chassis ground should be HV ground.
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