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Ifo pressure was 5.5 mTorr this morning. The PSL shutter was still open. TP2 controller failed. Interlock closed V1, V4 and VM1
Turbo pump 2 is the fore pump of the Maglev. The pressure here was 3.9 Torr so The Magelv got warm ~38C but it was still rotating at 560 Hz normal with closed V1
What I did:
Looked at pressures of Hornet and Super Bee Instru Tech. Inc
Closed all annuloses and VA6, disconnected V4 and VA6 and turned on external fan to cool Maglev
Opened V7 to pump the Maglev fore line with TP3
V1 opened manually when foreline pressure dropped to <2mTorr at P2 and the body temp of the Maglev cooled down to 25-27 C
VM1 opened at 1e-5 Torr
Valve configuration: vacuum normal with annuloses not pumped
Ifo pressure 8.5e-6 Torr -IT at 10am, P2 foreline pressure 64 mTorr, TP3 controller 0.17A 22C 50Krpm
note: all valves open manually, interlock can only close them
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While walking down to the X end to reset c1iscex I heard what I would call a "rythmic squnching" sound coming from under the turbo pump. I would have said the sound was coming from a roughing pump, but none of them are on (as far as I can tell).
Steve maybe look into this??
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PS: please call me next time you see the vacuum is not Vacuum Normal
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