Revision as of 16:49, 27 September 2012

September 27, 2012 FDC meeting

Agenda

Production Construction Tracking (Dave)
- First package tests (Vlad)
Cathode corrosion
- Recent SEM results Viton+Apiezon not cleaned, Viton+Apiezon cleaned with alcohol, Viton+Apiezon cleaned with xylene
Engineering (Bill)
Electronics (Chris, Nick)
Third package tests FDC E-log (Beni)
TDR, pages 132-143 (Lubomir)
Other: plots for Eugene's talk
- packages: #1,#3, #4
- corrosion: damaged cathode, EPDM optical, EPDM spectrum, Viton+Apiezon spectrum
- oxygen issue: g10 coating, and Viton+Apiezon reduce O2 from ~10,000ppm to <100ppm.
- test results: Wire Resolution from the full-scale prototype 40/60% Ar/CO%, 5*10^4 gas gain
- Some pictures from the TDR: FDC system, one cell elements, cell section, wire frame lamination, and other in that directory

@@ Line 21: / Line 21: @@
 = Minutes =
-Participants: Eugene, Bill, Dave, Chris, Nick, Vlad, Simon, Beni, and Lubomir
+Participants: Eugene, Bill, Dave, Chris, Nick, Vlad, Simon, Beni, and Lubomir.
 == Production ==
-- Dave: we started working on two new cathodes, #72 and #73, using the last two sets of foils (new foils are coming November/December). Casey and Tina finished stringing today the new wire frame #29. There is a small delay with the new g10 wire frames (Vision Machine didn't have the vacuum pump), but they promised to have the first frame by Monday.
+- Dave: Tina is soldering wire frame #29. Mike is working on the PCB ring for #30. Five new g10 wire frames (we asked for four) were made by Vision machine, then we laminated the Rohacel rings and sent them back to Vision for the fly cut.
+- Vlad: testing the first three cells of package #1. The oxygen went down to 170ppm, we started flushing on Sunday. All the channels were tested with a source and scope and are working fine. One pre-amp card was noisy, has to be replaced.
 - The first three cells of package #1 were assembled Monday-Tuesday using the standard Viton+Apiezon technique. Since then it's being flushed with gas. Oxygen goes down very fast, now it's about 1000ppm and expect it to be ~300ppm tomorrow so Vlad will start testing the package.