Minutes of feedthrough meeting of 11 February, 2002.
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Present: Pof, FH, PB, ML, WW, AD, ASD

*) Milestones

	- ft26 final tests were finished.

	- ft27 and ft28 (both standards) were built 
	  and welded; ft27 will be cold tested this
	  week and ft28 will be cold tested early
	  next week.

	- One warm flange and one cold flange were
	  also welded.  We now have on hand eight pair
	  of welded flanges ready for use.

*) ft29 and ft30 (both standard) will be built as soon
   as the pigtail jumpers are freed up after the cold
   tests of ft27 and ft28.

*) The heater plate power and RTD connectors and the
   two warm cables sent by Bob Hackenburg have arrived.
   Pof has ordered a crimp tool for installing the RJ11
   RTD connectors, although it remains to be seen whether
   or not we can make reliable connections.  BNL was unable
   to do so, but their RTD's have a finer gauge wire.

*) Pof has ordered all other wire and connectors to complete
   the ambient flange heaters.

*) Pof and Fiona will travel to CERN for another round of
   reception tests, departing Tuesday 5 March and returning
   19 March.

*) More plywood has been ordered so that more shipping
   crates can be built.  We should aim to ship eight feedthroughs
   to CERN for pof and Fiona to test.

*) A prototype heat shunt (to provide more heating capacity
   to the HEC LV warm cables) will be made, and tested during
   the cold tests next time we build a HEC feedthrough.  It
   remains uncertain whether we will use a heat shunt for
   the HEC LV warm cables, or simply run the HEC ambient
   flange heaters at a slightly higher temperature (~25 degrees)
   to prevent condensation at the HEC LV warm cables. 

*) Laurent Serin reported to pof that more T50 pigtails have
   been made.  We will be able to resume building HEC feedthroughs.
   The T52 pigtails (FCAL) have not been made yet.  

*) Laurent also indicated that the length spec for the pigtails
   is +/- 1 cm for pigtails < 1 m length (T47's and T48's) and
   +/- 2 cm for pigtails > 1 m length (T49's, T50's, T51's, T52's
   and LV).  The T47 and T48 pigtails that were measured last 
   week to about 88.5 cm were remeasured (with a little more
   effort at smoothing them out to achieve the full lenght) and
   all fell within the 1 cm tolerance.  These pigtails will
   therefore be considered as good.

*) Fiona found that one of the ground pins on an ft25 pigtail 
   micro-D was considerably recessed relative to the others,
   and it is not clear if it makes contact when plugged in to
   a mating micro-D.  There is usually one ground pin for every
   pair of signal pins in the micro-D connector.  The lack of
   contact of a single ground pin would pose a problem if the
   individual ground pins in the micro-D were isolated from
   each other (the cross talk would be condiderably enhanced).
   However, Laurent has confirmed that the grounds are all
   connected together in the micro-D, so there should be no
   problem if a single ground pin looses contact.  Also, the
   measured cross talk for that pigtail is not abnormally high.

*) Laurent has arranged for Patrick Cornebise to be at CERN on
   12 and 13 March (while pof and Fiona are at CERN) to repair
   the damaged kapton insulation on a few of the pigtails.

*) Tom Muller reported to pof on 12 February that BNL expects
   to build the last of their feedthroughs, excluding spares,
   by the first or second week of March.

Agenda for next week
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- Milestones
- shipping schedule
- Plans for the week
- AOB