Difference between revisions of "Minutes 8-16-2006"
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− | 1). The stretched cathode planes are backing in the oven at ~100 C to | + | 1). Tensioned Cathode Planes: |
+ | The stretched cathode planes are backing in the oven at ~100 C to | ||
drive out moisture. Brian thinks this may be the reason for the | drive out moisture. Brian thinks this may be the reason for the | ||
shorts found on the small-scale prototype. | shorts found on the small-scale prototype. | ||
Line 15: | Line 16: | ||
expected to return. | expected to return. | ||
− | 2). The gas system for the FDC prototype and cosmic chambers are now | + | 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 | separated. The Ar/CO2 to the cosmic chambers is now bubbling | ||
through alcohol at 0 C. | through alcohol at 0 C. | ||
Line 21: | Line 23: | ||
is better. | is better. | ||
− | 3). Brian has ordered a sample of Rohacell form (50 in x 100 ft x 5 mm) | + | 3). Rohacell Order: |
+ | Brian has ordered a sample of Rohacell form (50 in x 100 ft x 5 mm) | ||
for the cathode plane backing. | for the cathode plane backing. | ||
− | 4). Brian has put together the purchase request for the materials and | + | 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. | labor to make the cathode stretcher for the full-scale detector. | ||
- The purchase request still needs to be signed. | - The purchase request still needs to be signed. | ||
− | 5). Question: What should be the design of the ground planes? What | + | 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 | should we use for the dielectric? What should be the conductor | ||
thickness? | thickness? | ||
- Daniel will ask Gerard and Fernando. | - Daniel will ask Gerard and Fernando. | ||
− | 6). Brian will use real circuit boards for the full-scale tensioning | + | 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 | tests. He has been in communication with Chris Cuevas who will | ||
have someone in his group do the design. | have someone in his group do the design. | ||
Line 41: | Line 47: | ||
- Frames need to be designed. | - Frames need to be designed. | ||
− | 7). Brian should talk to PC board manufacturers. Can they guarantee | + | 7). PC Board Manufacturers: |
+ | Brian should talk to PC board manufacturers. Can they guarantee | ||
flatness to our tolerances? | flatness to our tolerances? | ||
- Randy Wojcik had identified manufacturers who could handle the | - Randy Wojcik had identified manufacturers who could handle the | ||
Line 47: | Line 54: | ||
- Brian should follow up on this. | - Brian should follow up on this. | ||
− | 8). We discussed a general cathode-ground-cathode mounting and | + | 8). Cathode Board Design: |
+ | We discussed a general cathode-ground-cathode mounting and | ||
design scheme. Brian should flesh out a plan and discuss this | design scheme. Brian should flesh out a plan and discuss this | ||
next week. | next week. |
Revision as of 09:07, 13 December 2006
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 backing 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.