From ambrose@fnal.gov Sun Nov 18 03:22:31 2001
Date: Sun, 18 Nov 2001 03:21:27 -0600
From: David Ambrose <ambrose@fnal.gov>
To: COT Group -- Adam <agibson@fnal.gov>, Alec <alwilli4@sas.upenn.edu>,
     Aseet <mukherjee@fnal.gov>, Ashutosh Kotwal <kotwal@phy.duke.edu>,
     Ayana <holloway@physics.harvard.edu>, Bill Orejudos <orejudos@fnal.gov>,
     Bill Robertson <Robertson@fnal.gov>, Bob Wagner <wagner@fnal.gov>,
     Cheng-Ju Lin <cjl@fnal.gov>, Dave Ambrose <ambrose@fnal.gov>,
     Eiko <eikoyu@fnal.gov>, Eric James <ebjames@umich.edu>,
     Evelyn <thomsone@fnal.gov>, Greg Veramendi <mendi@cdfsga.fnal.gov>,
     Jay <dittmann@fnal.gov>, JC Yun <yun@fnal.gov>,
     Ken Schultz <kschultz@fnal.gov>, Kevin Burkett <Burkett@fnal.gov>,
     Kevin Pitts <kpitts@fnal.gov>, Kirby <kirby@fnal.gov>,
     Marina Brozovic <brozovic@fnal.gov>,
     Michael Lindgren <mlindgre@cdfsga.fnal.gov>, Morris <Binkley@fnal.gov>,
     Nigel Lockyer <lockyer@fnal.gov>, Paris <Parisp@sas.upenn.edu>,
     Peter Tamburello <tamburello@fnal.gov>,
     Peter Wittich <wittich@higgs.hep.upenn.edu>, pjw <pjw@fnal.gov>,
     Reinhard Eckmann <eckmann@fnal.gov>, Rob Snihur <snihur@fnal.gov>,
     Robyn Madrak <madrak@fnal.gov>, Ron Moore <ronmoore@umich.edu>,
     Ting <tmiao@fnal.gov>, Tom Phillips <phillips@phy.duke.edu>,
     Young-Kee <ykkim@fnal.gov>
Subject: owl report


I made some final checks of the front-end before the plugs close.  I was
not able to include crates 4 and 5 in Run Control.  Luckily these don't
include any of the u-coax that was involved with the wire fix, but it
would be good if we could get these back before Monday when the West Plug
goes in.  From the e-logs it looks like Mike Kirby is working on this.
Crate 4 appears to have the same TRACER-related problem of last week,
which was "fixed" by swapping in a spare board.  The crate 5 slot problems
in 7 and 9 are new.


There only appeared to be two other problems:

   SL5-164 (B,346,14-10-2): OKAY
   SL5-165 (B,346,14-10-2): 00 dead, 12 hot!, 00 warm

      --> Noisy cell, looks like "odd-cell" stuff, just below the wire fix.
      --> Slit the baggy and looked at the HV side.  Did some rework of
          the f-cage and added copper tape, but noise only slightly
          diminished.

   SL5-004 (A,018,10-12-2): 00 dead, 12 hot!, 00 warm
   SL5-005 (A,018,10-12-2): 00 dead, 12 hot!, 00 warm

      --> All channels of the ASDQ are oscillating.  This problem appeared
          AFTER my first calibration run.
      --> Plug-ins at TDC and rptr OK.  Did TDC and rptr cable swaps and
          verified that problem was with u-coax or ASDQ.
      --> Opened baggy, f-cage.  u-coax plug-in OK, and control voltages
          OK.  My only guess is that the f-cage was cutting into the
          u-coax.  After I put everything back together, making the u-coax
          less tight against the f-cage, problem disappeared.  All cable
          swaps have been undone.


I don't believe the 5-165 problem warrants a delay in the schedule, so I
told Rob we are ready to move in the East Plug.  Since the problem is
limited to the odd channels, I doubt it's on the East side anyway.  If we
do have time tomorrow, we could take another look with the spy on the
West.  I don't think we should close the West plug blind to crate 4-5 cells,
though, so we should focus on this tomorrow.