Minutes of Feedthrough Meeting of 17 June 02
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Present: Pof, PB, FH, WW, ML, AD

Milestones:

	- Final electrical tests were completed for ft44, ft45,
	  and ft46.

	- ft46 and ft47 were successfully cold tested.

	- ft48 and ft49 are being welded today (17 June).

*) Wendy found that the four leads of one RTD in ambient flange
   heater number 007 were all shorted togeter.  Neil investigated
   and found that the source of the short was in the potted RTD, 
   not in the wiring.

*) Two "four packs" of Standard and/or Special feedthroughs will
   be shipped to CERN this week for Wendy to work on while
   at CERN in July.

*) Cabling of the last HEC feedthrough should commence early
   this week.

*) PB will depart for CERN on Friday this week (21 June) to
   assist Aboud with the preparations for feedthrough installation
   on ECC.

*) Richard has sent us the following notes from today's 
   LARG week C&C general meeting at CERN:

	Cryostats and cryogenics meeting June 17 2002
	^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

1. Pierre Paillier
 a. Barrel feedthroughs (64) installed + 5 cryolines + a dump
    valve. All finished on April 26,2002.
 b. Film http://cern.ch/aleksa/b180 video.htm
 c. Barrel vacuum cycled 5 times - found some small o-ring
    leaks that were fixed.
 d. Pressure test failed with large leaks at 2.3 Bar. The leak
    was on the A side Omega seal. The reason was super-insulation 
    caught between the bulkhead and the outer cold vessel flange. 
    Fix by mid July
 e. Deformation of the vessel under pressure was as expected.
 f. HT FT installed in September - some cleanliness issues
    need to be solved.

2. Christophe
 a. Barrel vacuum manifolds: A good vacuum and a bad vacuum
    manifold at each end.
 b. Good vacuum manifold is being installed
 c. Bad vacuum manifold is being redesigned - no reason given
 d. Endcap manifold drawings are done

3. RKK (send talk URL to Pierre)
 a. Talk went fine.
 b. Pierre has several comments:
 c. ECC pressure, vacuum and cold tests all passed ok
 d. Worried about telephone jack but thought it carried 3 amps. 
    I told him it was only for the temperature readout and not the 
    heater power.
 e. Pigtails should be decided this week. Hopefully go ahead
    with production and test as soon as possible

4. Highvoltage feedthrough report
 a. Breakdown current from PEEK insulation being nicked at sharp edge 
    of Douglas epoxy. This happened during cleaning and handling
 b. NOTE speaker claims that are 45 m3 of LAR in barrel. Is
    this true when the barrel is full of detectors?
 c. Solution is to change epoxy. New epoxy must be tested for
    lar pollution in Dubna in September.
 d. Will need to flow dry air into filter box all the time the
    experiment is running. Therefore an airpipe needs to be installed.

5. Aboud
 a. Cold test has just finished successfully - big relief
 b. There were some surprises. There was not enough super-insulation. 
    The warm tube became 2 deg C and there was 2cm of water in the "tube"
 c. FT installation should start between June 26 and July 7.
    The early date is when the "tubes" (?) can be cut

6. Serge ECA
 a. SIMIC milling machine being repaired.
 b. Outside machining is finished
 c. Starting on inside machining
 d. Vacuum tests at SIMIC in Sept and Oct
 e. Delivery at CERN Jan 30, 2003
 f. Ready for use Feb 28,2003
 g. Pierre says that SIMIC still has problems with the milling machine

7. Allain Gonidec
 a. External cryogenics
   i.   First LN2 tank leaked - fixed
   ii.  LAR storage vessel started
   iii.	LN2 fridge started
   iv.  1.2 Km of cryolines awarded 2.1MSFR
 b. Proximity cryogenics
   i.   1 valve box arrived
   ii.  expansion vessel in production
   iii. Proximity cryolines still need design work and a draughtsperson
 c. B180 cryogenics
   i.   Cryoplatform delivered
   ii.  FT heater control tested and in production
   iii. 10 filter boxes delivered and installed

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