Minutes of feedthrough meeting of 7 May, 2001.
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Present: PB, Pof, AWD, GV, ML, RKK, MGF, ASD

*) Milestones

	- ft04 welded shut, cold tested, and awaiting
	  final electrical tests

	- pincarriers for ft05 welded onto flanges and
	  leak checked; now ready for cabling

*) The order for the glenair pigtail jumpers (3 inch BNL type)
   has been cancelled since their unit price jumped from 
   USD 253.95 to USD 361.08 when the quantity was reduced
   from 50 to 10.  We will rely instead on ordering enough
   additional AXON jumpers to complete two full sets (we will
   require six additional 50 Ohm jumpers for two sets of 
   15 + 15 with impedances that match a standard feedthrough)
   plus a few (~ two 50 Ohm + two 25 Ohm) spares.

*) Three sockets on ATI connectors have been damaged over the
   last several months during testing and assembly.  In at
   least one case, it is evident the the socket on the test
   harness was at least partially damaged during the course of
   several pincarrier plugins (pins from those plugins were
   slightly bent) before failing completely and crushing a
   pin.  Procedures will now be modified such that the sockets
   of all cables should be visually inspected before being
   plugged in.

*) Paul B will request a bill from SM for the welding done
   to date.

*) Three more shipping crates need to be build, which will
   bring us to a total of six.

*) Impact shields to be attached to the warm flanges once the
   feedthroughs have been installed need to be constructed.
   These will probably be a layer of rigid foam topped with
   plexiglass.  Aboud has expressed concern that, without such
   shields, the feedthroughs will be at risk from falling objects 
   or errant cranes.

*) Some thought should be given also to whether or not the
   feedthrough bellows should be protected against possible
   collision with the bellows braces in the event a feedthrough
   is dropped while still in the shipping crate.  The clearance
   between the bellows and the bellows braces is approximately
   1 - 2 mm.

*) We should take one of our crated feedthroughs (preferably
   ft-1) for a `test drive' over a rough road, and check that
   no damage has been incurred from the rough ride. 

*) The QA guy from SM (Darren) told us that our current welder
   (Ron) will likely do most if not all of the remaining 
   feedthrough welds.  Darren also said that SM has several more
   welders available with the required certifications; one
   of those will accompany Ron on one of his upcoming visits
   so that he can observe how the welds are to be done. 

*) Arrangments will be made with Chris Oram to come for a site 
   visit sometime after 21 May to observe and report on our 
   feedthrough production.  Ideally, at least one feedthrough 
   should be in the assembly jig and in the process of being cabled
   during his visit.

*) Pof has checked with Patrick Fassnacht regarding the scaffolding
   to be used for the feedthrough electrical tests once they have
   been welded onto the cryostat.  Patrick put pof in touch with
   Didier Steyaert, who informed us that the scaffolding will in
   fact be in the form of a motorized elevator platform.  Pof will
   keep in touch with Didier to make sure that all details of the
   operation are understood.

*) Tom Muller reported at the April LARG week that Glasseal
   was presently (mid April) producing 15 pincarriers per week,
   and expect to be up to 20 pincarriers per week by the end
   of May.

*) Twelve 7-row and twelve 8-row pincarriers were shipped to us
   from Glasseal on May 7.  The tracking numbers have been passed
   on to Bonnie. 

Agenda for next week:
^^^^^^^^^^^^^^^^^^^^^
- Milestones
- Progress on ft04, ft05
- Plans for the next 24 pincarriers
- AOB