Minutes-3-25-2010

March 25, 2010 FDC meeting

Tentative Agenda

1. Production space update off-site floor plans
2. Electronics
   • threshold variations in the discriminator section of the pre-amps (Fernando) Fernando's pdf
   • PCB status
3. Frame modification
   • cathode sandwich and wire frame
   • ground plane tests (leakage, tension)
4. Wire winding update
   • IUCF phase 3 contract phase 3 budget
   • plans for wire winding upgrades in the summer
   • tension specs
5. Full scale prototype tests
   • lessons learned from the HV tests cope-shots1, cope-shots2, HV issues
   • plans for tests in the tend
   • some results from the tests with Sr source FDC Log Book (Lubomir)
6. Cathode frame redesign
   • MC studies of the beam hole size (Alex)
7. Other
   • wire sample measurements wire sample reports
   • updated FDC naming convention naming convention

Minutes

Participants: Lubomir, Eugene, Bill, Daniel, Glenn, Casey, Mark, Beni, Simon, Fernando

Production space update

Two options are being considered. Properties behind Office Depot (preferably "Minuteman Press") and properties around Middle Ground Blvd (at Blue Crab) . The rent price of the latter is half the one at Office Depot, but requires building a room inside the bay area. Our position is that he most promising for FDC construction that needs only minimal modifications is the "Minuteman press". We can share the bay area with SRF (John Hogan).

Electronics

- Fernando presented measurements comparing the discriminator part of the pre-amp cards. The worst card so far is showing ~30% variations (min - max range). The question was whether this is acceptable. We all agreed that we don't want to modify the present design of the cards.

- Next week the design of the PCBs will be finalized (Fernando, Kim, Dan) and posted on the web. We discussed also the option of having checking points on the sense wire resistors at the readout side, related to the problems with the resistors discussed later.

Wire winding update

- Dan informed us about the latest IUCF budget estimate for phase 3 including the wire winding upgrades. This and other topics related to the transfer of responsibilities from Dan will be discussed in a separate meeting on Monday.

- the specifications for the wire tension will be revisited at the next meeting (Lubomir)