Difference between revisions of "Minutes 8-16-2006"
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| − | + | ==Tensioned Cathode Planes== | |
| − | The stretched cathode planes are | + | 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 | 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 16: | Line 16: | ||
expected to return. | expected to return. | ||
| − | + | ==Gas System Work== | |
The gas system for the FDC prototype and cosmic chambers are now | 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 | ||
| Line 23: | Line 23: | ||
is better. | is better. | ||
| − | + | ==Rohacell Order== | |
Brian has ordered a sample of Rohacell form (50 in x 100 ft x 5 mm) | 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. | ||
| − | + | ==Cathode Tensioning System== | |
Brian has put together the purchase request for the materials and | 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. | ||
| − | + | ==Ground Plane Design== | |
Question: What should be the design of the ground planes? What | 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 | ||
| Line 38: | Line 38: | ||
- Daniel will ask Gerard and Fernando. | - Daniel will ask Gerard and Fernando. | ||
| − | + | ==Tensioned Cathodes== | |
Brian will use real circuit boards for the full-scale tensioning | 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 | ||
| Line 47: | Line 47: | ||
- Frames need to be designed. | - Frames need to be designed. | ||
| − | + | ==PC Board Manufacturers== | |
Brian should talk to PC board manufacturers. Can they guarantee | Brian should talk to PC board manufacturers. Can they guarantee | ||
flatness to our tolerances? | flatness to our tolerances? | ||
| Line 54: | Line 54: | ||
- Brian should follow up on this. | - Brian should follow up on this. | ||
| − | + | ==Cathode Board Design== | |
We discussed a general cathode-ground-cathode mounting and | 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 | ||
Latest revision as of 11:51, 11 April 2007
FDC Weekly Meeting
Date: August 16, 2006
Participants: Daniel, Simon, Brian
Next Meeting: Wednesday, August 23, 2006 @ 9:30 a.m.
Contents
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.
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.
Rohacell Order
Brian has ordered a sample of Rohacell form (50 in x 100 ft x 5 mm) for the cathode plane backing.
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.
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.
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.
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.
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.
