Feedthrough Meeting 20/06/97

- HEC low voltage vacuum cable
  Terry reported on his FEA analysis of the temperature distribution
  of the vacuum cable along its length.  He will send an email soon
  on his results.  Margret to draw a ps figure to go with Terry's work.
  [done].
  Assuming 0.5A, there is no way that the standard vacuum cables can
  be used.  A factor of 4 seems needed in the Cu cross-section area.
  It is very likely that 8 connectors per quadrant will be needed AND
  that a special vacuum cable will have to be produced.

- RGA based Leak Tester
  Pof proposed a RGA leak tester design that would allow 2 well defined
  sensitivity settings.  A few remarks:
  - when all will be added, this RGA leak tester will not be cheap 
    contrary to what I though before (over $35k is we include a clean
    roughing pump), though a crude startup system could be put together
    using existing vacuum components purchasing only the RGA and one
    calibrated leak (about $15k).
  - there was a concerned about the time needed to pump the tester to
    operation condition between each use.  We are looking for fast
    turnaround.
  - Pof to gather costs fo the various items, and of a He commercial
    leak tester.

  Terry also noted that portability, in the case of a commercial He leak
  tester, will be important since it is likely that certified welds will 
  have to take place outside UVic.

- Margret and Richard at LARG week
  Michel to write an email concerning issues to follow during LArg week.