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Message ID: 5     Entry time: Mon Apr 11 18:39:17 2011
Author: Tom Davinson 
Type:  
Category:  
Subject: Monday 11 April 
TUDA was successfully re-installed on SEBT1 by LB, TD, AML and PM.
Alignment checked by pillar mounted telescope downstream of HERACLES
and target ball between SEBT1 bending magnet and diagnostic section. 
With minor adjustments of upper stage table the upstream and downstream
targets were within 15 thou L-R/U-D. Upper stage table and feet locked.

14.00 Cryo pumped by TUDA2:BP5 to <100mTorr
      TUDA2.RVC5 closed and cryo compressor switched on
      See attachment 1 for EPICS log

Note: MiniSys Eye-IMG ion gauge installed (EPICS readout only)

Re-entrant flange assembly installed - currently the 'window' NW25
fitting is open.

Centre target ladder linear translator re-installed. Note the
downstream linear translator needs to be moved to the upstream
position.

18.28 Time from 1 bar to 250mTorr ~12m (turbo ON)
      Time from 250mTorr to 5.0E-4Torr ~5m (cryo ON)

Note: Transients in TUDA:PNG5:RDVAC when cryo gate valve opened
      Observed pressure decreases to <1E-10Torr (PM tells
      me that for this gauge this effectively means 'off'
      cf. the usual TUDA ion gauge which reads high when 'off') 

      Time from 5.0E-4Torr to 5.0E-05Torr ~6m ('good' vacuum)

      Total pump down ~24m (empty chamber)
      See attachment 2 for EPICS log

07.32 Tuesday 12 April
      See attachment 3 for overnight EPICS log
      TUDA2:PNG5:RDVAC 7.2E-07Torr
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Attachment 3: 4.png  22 kB  Uploaded Tue Apr 12 08:31:30 2011  | Hide | Hide all
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