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Entry  Fri Jun 12 09:56:38 2009, steve, Configuration, VAC, new maglev installed m390pd.jpg
    Reply  Fri Jun 12 15:34:49 2009, steve, Configuration, VAC, maglev is running 
       Reply  Mon Jun 15 16:31:36 2009, steve, Configuration, VAC, RGA is scanning new Maglev 
Message ID: 1674     Entry time: Mon Jun 15 16:31:36 2009     In reply to: 1672
Author: steve 
Type: Configuration 
Category: VAC 
Subject: RGA is scanning new Maglev 



Joe and Steve


The retrofitted Osaka 390 was installed on the pumpspool yesterday.

V1 gate valve is disabled for safety by disconnected pneumatic power plug.

The foreline of this maglev now have a KF25 size viton o-ring directly on the turbo.

This is bad for leak hunting.

Joe is ready with new interface cable. Power supply and cables are in place.

The maglev was pumped down this morning.

All new gas kits and metal hose were leak checked by sprayed methanol.

There is no obvious sign of leak. I was expecting the pressure to drop below 1e-5 Torr in one hour.

TP2 is drying out the levitating coils of the turbo at ~7 l/s for N2

We'll start the pump as soon as Joe is in.



 Joe and Steve


The Maglev is running at 680 Hz, 40,800 RPM with V1 gate valve  closed and  valve disabled to change position. C1vac2 was rebooted before starting.

Interlocks are not tested yet, but the medm COVAC_MONITOR.adl screen is reading correctly. RGA scan will determine the need for baking on Monday

The foreline pressure is still  ~2e-5 Torr

Acceleration takes 3 minutes 30sesconds without load. There is no observabale temp effect on the body of the turbo during braking and acceleration.


The IFO is still pumped by the CRYO only

 The new Maglev fore line pressure is at 4e-6 torr at day 3

Valve VM1 was closed to isolate IFO from RGA and valve VM2 was opened so the RGA can scan the Maglev only.


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