Minutes 8-16-2006
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FDC Weekly Meeting
Date: August 16, 2006
Participants: Daniel, Simon, Brian
Next Meeting: Wednesday, August 23, 2006 @ 9:30 a.m.
1). Tensioned Cathode Planes:
The stretched cathode planes are baking in the oven at ~100 C to drive out moisture. Brian thinks this may be the reason for the shorts found on the small-scale prototype. - Simon should test the board to see if anything is different now. - Brian reported that once the moisture is driven out, it is not expected to return.
2). Gas System Work:
The gas system for the FDC prototype and cosmic chambers are now separated. The Ar/CO2 to the cosmic chambers is now bubbling through alcohol at 0 C. - Simon should see how the chamber behave and if the noise situation is better.
3). Rohacell Order:
Brian has ordered a sample of Rohacell form (50 in x 100 ft x 5 mm) for the cathode plane backing.
4). Cathode Tensioning System:
Brian has put together the purchase request for the materials and labor to make the cathode stretcher for the full-scale detector. - The purchase request still needs to be signed.
5). Ground Plane Design:
Question: What should be the design of the ground planes? What should we use for the dielectric? What should be the conductor thickness? - Daniel will ask Gerard and Fernando.
6). Tensioned Cathodes:
Brian will use real circuit boards for the full-scale tensioning tests. He has been in communication with Chris Cuevas who will have someone in his group do the design. - We will look into making these ``operational" boards that can be read out. - How many should be ordered? - Frames need to be designed.
7). PC Board Manufacturers:
Brian should talk to PC board manufacturers. Can they guarantee flatness to our tolerances? - Randy Wojcik had identified manufacturers who could handle the 1 m scale. - Brian should follow up on this.
8). Cathode Board Design:
We discussed a general cathode-ground-cathode mounting and design scheme. Brian should flesh out a plan and discuss this next week.
Note: Brian is back to half time on the FDC project.
Minutes prepared by Daniel. Send any comments or corrections along.