Minutes of feedthrough meeting of February 28, 2000.
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Present: AD, MGF, GV, PB, Pof, MLenc, TH, RL, JL, RKK

*) Milestones:

	- 132 pigtails arrived on 23 Feb from Orsay;
	  the customs charge was only $19.00.  There
	  were no cables for slots 1, 14, or 15 in this
	  shipment so it is not a sufficient supply to
	  build an entire feedthrough.  Also, some of
	  of pigtails have defective or missing jackscrews
	  at the micro-D end.  Orsay has been informed of 
	  these findings.

	- A unix account has been set up to help processing
	  the Cirris test data (some of the analysis code 
	  is written in fortran or perl).

	- The two pincarriers that arrived a few weeks ago
	  have now been cold cycled and will be leak checked
	  this week.

	- The lower funnel tubes were delivered to UVIC
	  today (1 March).

	- Mark visited Ebco on tuesday 22 Feb to inspect
	  the completed ambient flanges.  The only possible
	  complaint Mark had was that the ID of the pincarrier
	  slots were machined with slightly grooved surfaces
	  in the corners which could possibly trap dirt.  
	  Otherwise the flanges looked good.

	- The heat leak tests were done to 0.5 bar.  Terry
	  would like to see the tests done to 1.5 bar.  This
	  will require a flow meter with a higher range;
	  Paul B. will look into acquiring one.

	- The second BNC pulser has been ordered; the delivery
	  time was quoted at 60 days.

	- FCI/Berg has received the serial number labels that
	  Greg ordered.

*) Cold station instrumentation problems:

	- The He leak checker has been showing intermittent
	  problems, sometimes mismeasuring the calibrated
	  leak by one or two orders of magnitude.  It also
	  has occasionally shown an error on startup.  The
	  Balzers technical rep, contacted by PB, suspects
	  that there might be some loose connections in the
	  microprocessor board.  Paul B will try to debug
	  the leak checker this week.  We might be forced
	  to purchase a second leak checker...

	- One Balzers full-range gauge has stopped working,
	  bottoming out in the Pirani range without going
	  into the Penning range.  The Balzers technical rep
	  suggests trying to clean the gauge head.

*) News from Larg week:

	- Pierre Pailler was aware of the BNL steel problem,
	  but appeared to be satisfied with Terry's explanation
	  that, after extensive checking on our part, the steel 
	  problem appears to be isolated to the BNL shippment
	  and not ours.

	- The PQR's of some of the weld samples brought to CERN 
	  last week did not seem to be consistent with the
	  labels seen on the welds. Terry will check with Tom 
	  Goldback at SM about this.

	- TIS felt that the 6% - 10% ferrite content of the weld 
	  samples might be slightly on the high side, but is
	  still ok.  Cold Charpy tests are to be performed by
	  Linde on friday (3 March).  If these tests are passed,
	  then TIS will be satisfied with the welds.

	- The long weld samples sent to CERN do not have exactly
	  the same weld that will be used in production, as they
	  lack the bevel at the butting edge.  We might have to
	  produce new weld samples.  A decision will be negotiated
	  after the cold Charpy tests are performed.  There was
	  a similar concern about the burst vessel, which was
	  made with a smaller gap width and also used a single 
	  pass weld; all production welds will be two-pass welds.

	- Terry suggested installing the warm cables on the
	  warm flanges before final testing at CERN to minimize
	  the number of plugins to the warm flange pincarriers;
	  this idea was well received at CERN.

	- 23 amplifier/shapers were provided to us by 
	  Nathalie Seguin for more xtalk test apparatus.

*) The bill for the first steel shipment should be paid now. 

*) We need to acquire a ferrite meter.  These range in cost
   from a few tens of dollars to several thousand dollars.

*) Rejection labels have been ordered by Greg to be placed on
   rejected materials.

*) Dave Rahm has (been?) retired from the BNL feedthrough effort.
   Dave informed Roy that the BNL contacts are now Ken Sexton 
   or Dave Lissauer. 

*) Aboud has requested from Roy two `special' warm flanges
   equipped with one 8-row pincarrier each, as well as one
   `special' cold flange for testing, equipped with a 7-row
   pincarrier.  Roy will obtain drawings from Aboud for
   these special flanges.  We do not have enough production
   pincarriers to be in a position to part with any, so we
   will offer (sell) two 8-row PCT pincarriers (we have several)
   and one preproduction Glasseal 7-row pincarrier (we 
   apparently don't have any 7-row PCT pincarriers to unload).
   
*) Jobs for this week:

	- Roy is to contact Sicom to see if the first of
	  the seal rings and cuff rings are ready to ship;
	  BOA requires these to get started on the bellows.

	- Test and process the pigtails.

	- Check leak checker response with the standard
	  leak installed on the far (cold vessel) side of
	  the cold test station.

	- Write up the feedthrough meeting minutes...

Agenda for next week:
^^^^^^^^^^^^^^^^^^^^^
- Milestones
- Status of Camac CrossTalk setup 
- Discuss first full week of goods reception
- Any further news from TIS?
- Report from Roy about Sicom progress on cuff and seal rings 
- Leak Checker status
- AOB