Difference between revisions of "Minutes 9-6-2006"
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| − | + | ==Mechanical Drawings== | |
Brian has produced a new end view drawing of the FDC. His plan | Brian has produced a new end view drawing of the FDC. His plan | ||
is next to add traces, connectors, and bolt holes to the | is next to add traces, connectors, and bolt holes to the | ||
individual planes. | individual planes. | ||
| − | + | ==Rohacell== | |
- Brian brought a 1-cm thick sample of Rohacell to show us. This | - Brian brought a 1-cm thick sample of Rohacell to show us. This | ||
material can be machined to a very high degree of flatness. The | material can be machined to a very high degree of flatness. The | ||
| Line 22: | Line 22: | ||
with Youri Sharabian, Rohacell is gas tight. | with Youri Sharabian, Rohacell is gas tight. | ||
| − | + | ==Paperwork== | |
The PR for the full-scale tensioning system has finally been | The PR for the full-scale tensioning system has finally been | ||
signed. | signed. | ||
| − | + | ==Mechanical Mockup of Cathode Sandwich== | |
Brian will start work on a full-scale mock-up of the Rohacell | Brian will start work on a full-scale mock-up of the Rohacell | ||
sandwich. If kapton is not available, then mylar will be used. | sandwich. If kapton is not available, then mylar will be used. | ||
The Rohacell order should arrive in ~2 weeks. | The Rohacell order should arrive in ~2 weeks. | ||
| − | + | ==Wire Winding== | |
- Brian talked to Karen Kephart of FNAL. It seems as if the wire | - Brian talked to Karen Kephart of FNAL. It seems as if the wire | ||
winding shop will be available to ~2010. | winding shop will be available to ~2010. | ||
| Line 39: | Line 39: | ||
manner. | manner. | ||
| − | + | ==Design Discussion== | |
- DSC asked whether circuit boards can be made with a Rohacell | - DSC asked whether circuit boards can be made with a Rohacell | ||
dielectric -- Brian will look into this but the issue could | dielectric -- Brian will look into this but the issue could | ||
| Line 49: | Line 49: | ||
chamber stack. | chamber stack. | ||
| − | + | ==Monte Carlo== | |
- Simon needs to do Monte Carlo to specify the allowable Rohacell | - Simon needs to do Monte Carlo to specify the allowable Rohacell | ||
and epoxy thicknesses. | and epoxy thicknesses. | ||
| Line 58: | Line 58: | ||
might be required. | might be required. | ||
| − | + | ==Cathode Sandwich Discussion== | |
DSC again raised the idea not to tension the cathode planes | DSC again raised the idea not to tension the cathode planes | ||
but to work on a flat surface instead and roll the plane | but to work on a flat surface instead and roll the plane | ||
Latest revision as of 11:54, 11 April 2007
FDC Weekly Meeting
Date: September 6, 2006
Participants: Daniel, Brian, Simon
Next Meeting: Wednesday, September 13, 2006 @ 1:30 p.m.
Contents
Mechanical Drawings
Brian has produced a new end view drawing of the FDC. His plan is next to add traces, connectors, and bolt holes to the individual planes.
Rohacell
- Brian brought a 1-cm thick sample of Rohacell to show us. This material can be machined to a very high degree of flatness. The Rohacell thickness between the cathode and ground planes is nominally 5-mm. - Brian told us his plan is not to mount the Rohacell to a frame. He believes that this is not necessary. From Brian's conversations with Youri Sharabian, Rohacell is gas tight.
Paperwork
The PR for the full-scale tensioning system has finally been signed.
Mechanical Mockup of Cathode Sandwich
Brian will start work on a full-scale mock-up of the Rohacell sandwich. If kapton is not available, then mylar will be used. The Rohacell order should arrive in ~2 weeks.
Wire Winding
- Brian talked to Karen Kephart of FNAL. It seems as if the wire winding shop will be available to ~2010. - Brian discussed a neat wire deadening system used by Karen. The wires are embedded in a copper solution to build up their radii to a specified level -- this kills the gain in an elegant manner.
Design Discussion
- DSC asked whether circuit boards can be made with a Rohacell dielectric -- Brian will look into this but the issue could be local flatness. - Brian will look into PC board manufacturers who can make 1.2 m circuit boards to our specs. - Brian will show DSC the small-scale tensioning system in the EEL building this week. We need to plan on how to make a chamber stack.
Monte Carlo
- Simon needs to do Monte Carlo to specify the allowable Rohacell and epoxy thicknesses. - Note that there is no need to epoxy Rohacell to the ground planes in the active region. Epoxy only at external edges and possible the center point. - Could this work for the cathode planes as well? Some tensioning might be required.
Cathode Sandwich Discussion
DSC again raised the idea not to tension the cathode planes but to work on a flat surface instead and roll the plane flat.
Minutes prepared by Daniel. Send any comments or corrections along.
