Minutes of the UVic Feedthrough meeting Sept.27. 1999
 =====================================================
 
 Present: Greg, Pof, Paul B., Mike R., Aaron, Margret, Roy, Terry, Richard.

 
 1) LV test setup:

    Special connectors have been made for looping current
    through LV cables in the feedthrough assembly.
    4 temperature sensing diodes are almost ready to be
    installed.
    The main aim of the LV week will be to find the maximum
    acceptable current that can be run through the LV cabels
    without causing excessive thermal heating.
    A thermal strap for the heating resistor should be ready
    for a possible cold test towards the end of the low voltage week.

 
 2) Thermal Test writeup

    Terry has a draft copy of a thermal test writeup. 
    The conclusion of his note is that it is beneficial to
    install Rohacell insulation in the feedthroughs.

 3) 30 production type pigtails

    Pof reported that:
    The first 30 pigtails of production type quality
    (18xT47, 12xT48) have undergone continuity testing.
    No broken wires, shorts or cross-wiring were found.
    Typical DC restince values measured were about R=250mohm
    for the T48 (Z=25ohm) harnesses and about R=550mohm for the
    T47 (Z=50ohm) harnesses. There is a roughly 100mohm spread in the
    DC resistance distributions due to the limited precision
    of the cable tester.
    
    The (ATI-)nearest-neighbour cross talk tests have been
    done on the T47 cables. The x-talk pattern is dominated
    by the micro-D connecoters: Nearest neighbours in the ATI
    connector that are ALSO nearest neighbours in the micro-D
    connector have a base-to-peak xtalk of up to 0.3% 
    (peak-to-peak up to 0.6%). Nearest neighbours in the ATI
    connector that are NOT nearest neighbours in the micro-D
    typically have a base-to-peak xtalk of up to 0.12%  
    (peak-to-peak up to 0.25%).
    It was decided that a full 64x64 cross talk matrix should 
    be measured.
    The cross due to the micro-D connectors might limit 
    the cross talk test measurements we will have to do on the
    vacuum cables. 
    
 4) Berg cables

    Margret and Richard have been in contact with a 
    representative from Berg who answered some of our questions.
    He promised to send us early this week:
    Test data obtained from vacuum cables
    More recent drawings in electronic format
    A flow chart that was missing in their bid package
    A sample of their connector assembly
    A strategy of how they are planning to manufacture 
               calibration cables to the required precision.
    Comments on how they try to avoid stretching the ground clip
               due to tolerance build-up.

    Margret will write up a little note for Berg on why it is
    important to match the DC-resistances of the flex circuits pairs.

 5) Quality Plan 

    Pof has created tables for the database. He will meet with
    Terry and Aaron to discuss the ongoing work.
    

 6) Scheduling

    Margret is working on a monthly schedule with milestones
    of what should happen each month. This work is still in progress.
    Margret will meet with Paul B. and Aaron.

    Paul Birney produced a list of milestones. Some dates still
    need to be added, which will likely be done when Aaron, Paul
    and Margret meet. 

    Pof has worked out a list of tasks for a generic feedthrough
    production month. He estimates that 3 people can build 2 feedthroughs
    in 20 working days with a work load of about 4 hours per day and person.
   
    Richard pointed out that we need nice pictures and overviews
    over what we are doing.

 7) Pin Carriers

    8 pin carriers are supposed to have been shipped from Glasseal
    on Sept.24 .   

 8) TIS

    TIS has accepted our proposal for a burst-test model 
    equipped with 1 Glasseal pin carrier.

 9) The purchase order has been signed for Spec. Mech. to do
    the welding for the TIS and insertion models and the F.T. -1.

10) Margret has been trying to contact Don Makowiecki for some
    spare micro-D adapter boards but no luck so far, she'll keep trying.   
   
11) Paul Birney will check with Chris Oram whether we can use
    his Triumf cleaning facilities.

12) The cold funnel base and the lower funnel tube are still
    being worked on in the UVic shop.

13) Roy informed us that all interface drawings and drawings for production
    are now on CDD.

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 Agenda for Oct.4:
 -----------------
 Quality Plan
 Schedules and Milestones
 TIS update
 64x64 cross talk matrix for pigtails
 Items scheduled for this week - met or late?

 (Note: The LV week will start on Oct.4 with Horst Brettel at UVic))