Minutes of feedthrough meeting of 22 April, 2002.
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Present: Pof, FH, PB, AD, WW, ASD, MGF, RKK

*) Milestones:

	- ft37 was cold tested again after having shown
	  an open in a slot 2 channel during the previous
	  cold test.  The second cold test also failed
	  with an open in the same channel.  ft37 was
	  opened and both slot 2 vacuum cables (plus
	  one other) were replaced.  ft37 is being rewelded
	  today (22 Apr) and will be cold tested again
	  this week (along with ft39 if time permits).

	- ft38 was cold tested and passed.

	- ft39 has been cabled and will be welded today (22 Apr).

	- One pair of flanges will also be welded today.  This
	  will leave only three pair of flanges to be welded
	  to reach the required number of 55.

	- All pincarriers required for the project (55 feedthroughs)
	  plus eight or nine spare of each type (7- or 8-row)
	  will be finished the cold cycles / leak checks during
	  this week.  Before shutting down the cold-cycle apparatus,
	  we should consider how many spares we should have on
	  hand (for our use or others) which have been fully tested.

	- The faulty warm flange / seal ring weld on ft13
	  was repaired at CERN by Paul Garratty (CERN welder
	  ID 979).  While leak checking ft20 at CERN, another
	  leak was found on the warm flange / seal ring weld
	  (~10^-8 mbar-l/s, at about the 5:00 position), which 
	  was also repaired by Paul Garratty.  We do not 
	  understand how these feedthroughs passed our leak 
	  checks at UVIC (it is unlikely that they opened up 
	  during transport to CERN).  To try to eliminate future 
	  occurrences of missed leaks, the ambient bellows leak 
	  checks at UVIC will in the future be performed 
	  independently by two people.  Care should also be taken 
	  to check the calibrated leaks during each leak check.

	- ft13, ft16, ft20, and ft26 have all been turned over 
	  to CERN on Friday 19 April.  There are now at total of 
	  29 feedthroughs at CERN and all have been turned over 
	  to CERN (all feedthroughs requred for ECC plus three 
	  spare Standard and one spare Special).  The spare HEC 
	  feedthrough is still in transit to CERN, and will require 
	  reception leak and electrical checks before being turned 
	  over to CERN.  

	- Six crates of pigtails arrived on Tuesday 23 April.

*) News from the C&C & I&I ASSO:

	- The ASSO went well, with no serious concerns
	  expressed.  The endcap signal feedthrough
	  contribution to the ASSO was all of five minutes...

	- The expected delivery date for ECA is October 2002

	- Dates for the cryostats to be ready for the pit:

		Barrel:	 7 Apr 2004
		ECC:	31 Mar 2004
		ECA:	 3 Nov 2004 

*) Conversations with Pierre Pailler:

	- Feedthrough installation on ECC is expected to
	  start by the end of June, and finish by mid August.

	- The ambient flange heaters are to be installed
	  on ECC at the same time the feedthroughs are installed.

	- The Pedestal installation will commence immediately
	  following completion of feedthrough installation.

	- The warm cables will be after the pedestals, but
	  without the baseplanes (ie, the warm cables will
	  hang loose, not being connected to the baseplanes).

	- The baseplanes will be installed next, with the warm
	  cables connected to the baseplane as the baseplane
	  closes.

	- Electrical tests will be done last, with the test
	  cables plugged in to the top of the baseplane.  We 
	  may opt to jumper each pair of pigtails to cut the 
	  number of tests in half.

	Aaron pointed out that it may be better to perform
	the electrical tests immediately following each
	warm cable plugin, eliminating the necessity of removing
	multiple warm cables in the event a fault is found during
	the electrical tests.  This should be discussed with
	Pierre.

Agenda for next week
^^^^^^^^^^^^^^^^^^^^
- Milestones
- Plans for the week
- AOB