Minutes of feedthrough meeting of 19 June, 2000.
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Present: GV, Pof, PB, MLenc, AD, TH, MGF, RM

*) Milestones:

	- The remaining cuff and seal rings have been shipped 
	  to BOA.

	- The RFQ for the bellows braces and heater plates 
	  has been sent out.

	- The PO for dye-penetrant and radiograph tests has
	  been sent to SM.

	- The graphite thermal pads pre-cut to match the
	  resistor footprints have arrived.  The high-power
	  resistor tests should commence this week.

	- 2 Warm Flanges, 4 Cold Flanges, 6 Bellows Assemblies, 
	  and 4 Funnel Assemblies were cleaned last Thursday
	  with the TRIUMF ultrasonic bath.  PB's time estimates
	  for the various cleaning tasks, with two people working,
	  are as follows:

		Unload truck (PB's Nissan	1 hr 
		Pathfinder) and set up 
		ultrasonic bath.

		6 flanges			1 hr

		4 bellows			2 hrs

		3 funnels			1 hr

		2 bellows and 1 funnel		1 hr

		Reload truck			1/2 hr

	  The cleaning procedure consisted of the following
	  steps:

		1) The parts are submerged in a cleaning tank
		filled with a water-based industrial cleaning
		solution.

		2) The solution is agitated with submersible
		ultrasonic transducers.

		3) After a soak period (of approx. 10 min) the
		items are removed from the cleaning solution and
		the surfaces are brushed or wiped and all tapped
		holes are cleaned with a test tube cleaning brush
		spun in reverse on an electric drill.

		4) The parts are returned to the cleaning tank and
		agitated for an additional period of approx. 10 min.

		5) The parts are removed from the cleaning
		solution and rinsed with water sprayed from a
		nozzle.

		6) The parts are dried with an air nozzle. With
		the bellows it is necessary to soak up the water
		from the inside of the convolutes with a cloth
		before drying.  

		7) When dry the parts are sealed in polyethylene.  

	  The bellows proved to be the most difficult item to
	  clean, primarily due to the difficulty in rinsing
	  off the cleaning detergent and removing the rinse
	  water from the inside convolutes.

*) Alberto Desirelli has requested that the most recent weld 
   tests be redone, this time with the weld penetrating fully
   to the backing plate.  Terry will arrange with SM for this 
   to be done.

*) A large batch (numbers unknown) of bellows assemblies is 
   expected to be shipped to UVIC sometime this week.

*) Albin Effernelli wrote that he will ship four repaired T-piece
   glands to UVIC on 19 June.  The T-pieces are numbered, and
   their measured leak rates are:

        - 24, leak rate 10-9 mbar.L/s
        - 25, lek rate <10-9 mbar.L/s
        - 26, leak rate <10-9 mbar.L/s
        - 27, leak rate 10-9 mbar.L/s

   The assembly instructions for the VCR fittings will be included in
   the package.  More Tees will be provided as they are repaired.

   Mark L. has ordered the parts to make two T-pieces at UVIC (total
   cost ~ $100) in case of further problems with the T-pieces from CERN.

   Looking through some VCR literature from Cajon, VCR fittings seem
   to be spec'd leak tight typically at 4 x 10-9 mbar.L/s, so I (pof) 
   do not believe that the measured leak rates of 10-9 mbar.L/s should
   prove alarming.  Once the repaired T-pieces have been received at UVIC,
   we will repeat the leak checks, paying special attention to the torque
   required to attain the seal (we should try to quantify the torque).
   If we measure comparable or smaller leaks without the use of excessive 
   torque, we'll go ahead and use the repaired T-pieces.  If anyone has
   any further thoughs on the T-piece issue, please circulate those
   thoughts to this mailing list.

*) The crate designed by Mark to hold the feedthroughs is not large
   enough to also hold the bolt ring.  Two additional crates will be 
   built to hold the bolt rings, which will be placed in the large
   shipping container along with the feedthrough crates.  Each of the
   bolt rings must be cleaned and individually bagged beforehand.

*) July LARG week agenda:

	- Terry will present the heater design and tests.  Pierre Pailler 
	  has been notified of the presentation, and that we would like
	  a decision soon.

	- Terry or Roy will clarify with Pierre the `interface' items
	  (o-rings and rf gaskets).  The costs are nominal, but UVIC does	
	  not want to take the responsibility of the integrity of the
	  feedthrough seal to the cryostat.  Terry suggests that UVIC
	  could purchase and supply the o-rings and rf gaskets, provided
	  that CERN specify *exactly* what parts to purchase.  Please 
	  circulate any other comments on this to this mailing list.

	- Margret will communicate with Horst regarding the pincarrier
	  request.  Two leak-tight PCT pincarriers (AD is to identify 
	  which ones) could be given to MPI as payment for the prototype
	  pigtails provided to us.

	- Pof will present the project status and near-future plans,
	  FCI cable test results, and projected test plans at CERN. 

	- There is, of course, also the HEC baseplane issue that should
	  be monitored closely.

Agenda for next week:
^^^^^^^^^^^^^^^^^^^^^
- Milestones
- Test results for T-piece glands from CERN
- Construction plans over the next two weeks for FT0
- Final words on heater design before LARG week presentation
- AOB