May 26, 2009 CDC Meeting

Meeting Time and Place

Tuesday May 26 2009 at 1:00pm At Jefferson Lab, the meeting will be held in room ??

Connections

To connect from the outside, please use ESNET
1.) ESNET: 8542553
2.) Phone:
+1-800-377-8846 : US
+1-888-276-7715 : Canada
+1-302-709-8424 : International
then enter participant code: 39527048# (remember the "#")

Notes from the previous meeting

1. Primex chamber gas velocity about 80 cm/s - curtis will relook at his numbers
2. Should the wires be strung at JLAB so broken wires during transport are not an issue? Will need to find space for this at JLAB - timeframe Nov 2010. Would Gary come here for the rest of the assembly? Would students be brought down from CMU?
3. Should there be some type of cleanroom used for CDC assembly?
4. Gary found conductive rubber tubes .030-.050 in. diameter. Should be good for 1mm single diameter pin.
5. Do we need a shoulder on the crimp pin? Is a counter bored hole adequate to stop the pin from going in too far and moving from wire tension?
6. Gary found transit to accurately locate plates relative to each other within .003 inches.
7. Curtis suggested using 2 inch rods for initial alignment of plates before gluing straws.
8. Need to determine how much room is available on inner edge of endplates for tooling. Dous the gas plenum ever need to come off?

Agenda

1. Assembly procedure
   • Draft Procedure [Word File]
   • Photos of Assmbly Hub for the CDC
2. Gas flow into chamber (Gas Flow in the CDC)
3. Lumina Straws/ Kapton vs Mylar CDC_Straw_Sag_photos
4. Electrical Hookup of the CDC CDC_Electrical_Hook_Up_Photos
5. Leak test on assembly
6. Crimp pin design [[1]]
7. AOT