Feedthrough Meeting 16/06/97

After the BNL review, Terry, Paul and Michel are now convinced
that we should not build a single pin carrier cold leak testing
unit.  Instead, the pin carriers will be temperature cycled 
(not shocked) and leak tested at warm between cycles.

Today's meeting was held to address the issue of the leak tester.
After some discussion, we agreed to further study the RGA based
leak tester.  
Advantages:
- Can measure the partial pressure for more than just He;
- Cheaper since we already have some components.

Of course, it means we have to built it ourselves and it must be
sensitive up to 10*-10 atm*cc/s of He.

In the next few days (for Friday 20th meeting) we agreed to look
into the design, and to look into the important parts to order:

- 1 RGA 200 AMU
  The 200 AMU is justified by the possibility of detecting some
  residual from the kapton outgasing if needed (remember that for
  the total assembly test station, all the pigtails will be in
  the setup to be leak tested);

- Cold Cathode / Pirani gauges
  2 heads;
  1 controller with RS232 output;
  2 long cables.

- 2 calibrated leaks
  one in the >= 10**-10 atm*cc/s
  one in the    10**-8  atm*cc/s

- one clean roughing pump

- other vacuum parts

Action list:

- Pof to further look into the RGA;
- Pof to finalise the Gauge order;
- Paul and Pof to look into the calibrated leaks;
- Paul and Pof to look into the roughing pump;
- Paul and Pof to work some more on the design of the RGA based
  leak tester and prepare a list of other vacuum parts needed.
- Michel to check with Sid and Michael concerning the RS232 and
  its compatibility with LabView.

We agreed to discuss this further Friday afternoon.