Minutes of feedthrough meeting of 13 May, 2003.
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Present: Pof, FH, ML, PB, RKK

*) During the post-weld electrical testing of the ECC feedthroughs,
   it was discovered that the baseplane channel corresponding to
   channel 64 of feedthrough slot 14b is shorted to ground in all
   standard baseplanes.  A similar feature was found in the HEC 
   baseplane channels corresponding to channel 64 of feedthrough
   slots 11a and 11b.  These slots are all monitoring slots, and
   the shorted channels turn out to be forgotten and undesirable
   design features of the baseplanes.  In the case of the standard 
   baseplanes, it results in the loss of some LAr temperature probes.  
   It is possible that these could be recovered if the ECC standard 
   baseplanes were pulled back to allow the corresponding warm cables
   to be moved to the adjacent baseplane slots, which are vacant and
   do not have these faults.  The pulling back of the baseplanes, 
   however, will compromise the integrity of the electrical cross
   talk tests carried out in April.  A decision on this possible
   action is pending. 

   It was also found during the electrical tests that the LV channels
   of the HEC feedthroughs are swapped in all cases from what was
   expected (channel 1 <-> channel 2, channel 3 <-> channel 4, ..., 
   channel 63 <-> channel 64).  This is apparently due to a
   manufacturing fault of Axon.  Unfortunately, all the tests performed 
   on the LV cables and the completed feedthroughs in Victoria turn
   out to be blind to this particular fault.  Fortunately, however,
   each pair of swapped channels turn out to be source/sink lines
   for a particular circuit, and the problem is trivially solved
   by swapping the polarity at the power supplies.

   Aside from the possible re-cabling of the "shorted" warm cables
   mentioned above, Victoria's involvement with ECC is complete.

*) The final bill for the pigtails arrived last week.  Michel and pof
   will go through the details later this week to make sure that
   Axon's account corresponds to ours.  The tax preferred status for
   the import/re-export of the pigtails purchased through Orsay
   should also be closed soon.

*) ECA is scheduled to be delivered to CERN on 30 May.  Assuming this
   actually happens, and the ECA reception at CERN goes without
   problems, feedthrough integration will commence at the end of June.
   Fiona and pof will travel to CERN a couple of weeks earlier to
   do the reception tests on five remaining feedthroughs, and also
   possibly to do the monitor warm cable moving mentioned above.

   The nominal travel plans are as follows:

     Fiona and pof:  mid June      -> ~ 8 August     (feedthrough integration)

                     ~ 1 September -> late October   (warm cable installation
                                                      and cross talk tests)

     Paul Birney:   ~ 15 September -> ~ 1 October    (warm cable installation)

   Ken Sexton from BNL will probably be at CERN for the month of September
   to install the pedestals and to help with the warm cable installation.

*) Neil is working on another set of warm cable installation gizmo's which test
   for bent pins.  These will be spares in case the originals are damaged,
   and will be finished in time for the next round of warm cable installations.
   We also require about eight more 1/16 inch ball drivers for the micro-D
   screws, since they have a very short lifetime when in heavy use.

*) The remaining ambient flange heaters have been completed and tested, and
   will be shipped to CERN a few days before Fiona and pof depart.

*) One FCAL pigtail cable (T52, serial number 6833) will be sent to Peter Krieger
   at CERN for possible use in this summer's test beam.  The pigtail will be
   exported permanently, not intended to be returned to Canada.  This will
   be returned to us after the test beam, but will remain at CERN.

*) Fiona and pof must still do the final inventory of unused feedthrough parts,
   documenting which of those parts are still usable as spares.  All unused
   parts will also be stored in containers taking the least possible space.
   We must also keep some ability to do emergency repairs of feedthroughs
   at least until the feedthrough integration of ECA is completed.