40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  40m Log  Not logged in ELOG logo
Entry  Fri Jul 30 09:55:34 2010, steve, Configuration, VAC, slow pumpdown has started slowpd5hr.jpg
    Reply  Fri Jul 30 17:54:55 2010, steve, HowTo, VAC, How to stop and start slow pumpdown 
       Reply  Fri Jul 30 22:07:42 2010, Koji, HowTo, VAC, How to stop and start slow pumpdown 
          Reply  Sat Jul 31 10:12:05 2010, kiwamu, Update, VAC, Re: How to stop and start slow pumpdown 
             Reply  Sat Jul 31 14:59:33 2010, kiwamu, Update, VAC, Re: How to stop and start slow pumpdown 
    Reply  Mon Aug 2 10:26:15 2010, steve, Configuration, VAC, very slow pumpdown completed veryslowpd.jpg
Message ID: 3347     Entry time: Mon Aug 2 10:26:15 2010     In reply to: 3331
Author: steve 
Type: Configuration 
Category: VAC 
Subject: very slow pumpdown completed 

Quote:

Bob and Steve closed BS chamber with the help of the manual Genie lift and the pump down started. The PSL shutter was closed and manual block was placed in the beam path. High voltage power supplies were checked to be off.

Pumping speed ~ 1 Torr/min was achieved at  1/8 of a turn opened roughing valve RV1

 3 days pump down #69 completed. Thanks to Koji  and Kiwamu  who did more roughing on Saturday and Sunday.

Attachment 1: veryslowpd.jpg  66 kB  | Hide | Hide all
veryslowpd.jpg
ELOG V3.1.3-