Minutes of feedthrough meeting of March 06, 2000.
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Present: AD, MGF, GV, PB, Pof, MLenc, TH, RL, JL, RKK

*) Milestones:

	- 62 LowerFunnelTubes arrived from Sicom.
	  Of these 62 pieces, Sicom passed 52 and
	  failed 10.  Of the 10 pieces that Sicom
	  failed, we passed 8 and failed 2, giving
	  us a total of 60 pieces with a passing
	  status.  All pieces have been inspected,
	  etched with serial numberes, and entered
	  into the database.  They will be sent to
	  SM for funnel manufacture as soon as the
	  funnel bases have arrived from Sicom 
	  and been inspected.

	- The T47 and T48 pigtails that arrived on
	  23 Feb have been visually and Cirris tested,
	  entered into the database, and boxed in
	  RubberMaid storage containers, with one
	  feedthroughs's supply of pigtails in each
	  container.  The pigtails with defective
	  or missing jackscrews have been left out
	  of the RubberMaid containers pending the
	  arrival and installation of replacement 
	  jackscrews.  The HEC pigtails will not be
	  Cirris tested until an adapter can be made
	  to accept the HEC connectors.  This is still
	  waiting for parts.  Samples of these parts
	  have been ordered and should arrive soon.

	- The Lecroy xtalk VI is now working but still
	  needs some fine tuning to optimize resolution
	  vs `time to test' issues.  A second shaper/amplifier
	  unit needs to be built by our shop (this should
	  commence this week) before the full mobile xtalk
	  station can be completed.

*) Clean Lab issues:

	- There was a discussion on the general cleanliness
	  of the lab, and what steps need to be taken to
	  improve the situation.  Some of the ideas mentioned
	  are summarized here:
		> Restrict access from the hall, allowing
		  access only from 021.  Some sort of
		  shoe cleaning station will be established
		  at the door between the lab and 021.
		> No goods are to be received in the lab;
		  goods should only be received in 021 so
		  that no `dirty' shipping crates enter the lab.
		> Coordinate with Susan and facilities management
		  to have the floors and tables washed.
		> Daily janitorial sweeping in the lab should
		  be discontinued; we will perform these tasks
		  ourselves.

*) No news yet from TIS regarding pressure or Charpy tests.

*) Terry spoke with Tom Goldbach at SM regarding the inconsistencies
   with the weld sample PQR's.  Tom confirmed that there were
   nconsistencies and will supply the correct numbers.

*) Terry has sourced a ferrite tester for $634.

*) Ebco phoned last tuesday and indicated that the warm flanges
   are expected to be finished by 18 March.  One week later, the
   first of the cold flanges should be completed, and all the
   cold flanges should be completed by 18 April.  They will
   require more steel (the next shipment from Timken) to complete
   the job.

*) Scicom has completed ~98% of the work with their present
   steel supply, but is still waiting for 31 funnel base
   pieces to fully complete the project.  Ten parts of
   cuff rings and seal rings are to be delivered by the
   end of this week, and will subsequently be shipped to
   BOA after inspection an UVIC.

*) There has been no reply from Aboud regarding our offer of
   preproduction pincarriers and special flanges.

*) BNL has a quote for their heater design at US$800.  Our
   proposal is to use six heaters (resistors running well below
   their rated value) mounted on an Al or Cu plate, which will
   be a one-piece design to optimize heat conduction over the
   entire surface.  Two separate circuits would be used, providing
   redundancy in case of failure of one circuit.  BNL's design, 
   with two separate halves, provides no redundancy.  The cost is
   estimated at CDN$300 - $400 per heater.  Terry will work on an 
   FEA for this design, and tests will also be performed.  There is
   also a question of the use of thermal grease to improve the thermal
   contact.  Will grease be ok in a radiation environment and is 
   there any chance that it could migrate to the conductors in the
   pincarriers?

*) The He leak checker is still showing intermittent faults
   on powerup, but the calibration appears to be holding
   reasonably steady.  A log will be kept on all faults, and
   also all calibration factors each time the leak checker
   is recalibrated, noting also how long the leak checker
   has been powered up before the calibration was done.
   The intermittent fault might be due to a faulty micro-
   processor board.  We should get a quote on a replacement
   board, and consider keeping one on hand in case of total
   failure.

*) Paul B. did some pressure tests on the cold box (funnel) 
   on 28 Feb.  The pigtail bucket (blue box on top of the cold
   test station) and cold box were pressurized to 3.5 bar gauge,
   with the bellows and the volume surrounding the cold box
   held at vacuum so that the pressure difference was 4.5 bar.
   This is one bar greater than the pressure tests required
   by CERN.  During production testing, a pressure relief valve
   will be set to 3.0 bar, so that the test pressure will never
   exceed a value 0.5 bar less than what already has been tested. 

*) Jobs for this week:

	- clean up the lab and develop a long term
	  `clean lab' strategy (PB)

	- pincarrier-pin temperature vs current test (pof,PB)

	- clean/repair the faulty full-range vacuum gauge 

	- pigtail test (stretch to failure) (pof,PB)

	- Contact Timken about final steel shipment
	  for flanges and also pincarriers (TH)

Agenda for next week:
^^^^^^^^^^^^^^^^^^^^^
- Milestones
- Report on `clean lab' strategy
- Vacuum station status; do we need to purchase more parts
  (calibrated leaks, temperature diodes, spare leak checker 
   or parts of,...)
- Steel delivery from Timken
- Any news from TIS??? 
- AOB