Revision as of 12:33, 17 September 2015

September 10, 2015 Drift Chamber meeting

Connection

CDC update
- CDC response to 55Fe and 90Sr sources logbook entry
- Electronics response functions
- The sag saga: maximum docas at center of CDC
FDC update
- studies with 90Sr and 55Fe on spare package: [2],[3], [4]
Electronics
Engineering
Other

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 == FDC update ==
-- Scope picture of the drift times in the two thick chambers of the spare package shown above, using 90Sr source and a trigger made on the scope by coincidence of two parallel wires from the two chambers. The drift times look
+- Scope picture of the drift times in the two thick chambers of the spare package shown above, using 90Sr source and a trigger made on the scope by coincidence of two parallel wires from the two chambers. The max drift times for the first cell is about 9 usec, while Garfield predicts ~6 usec. The next two plots show the total charge vs max amplitude with 55Fe source: it demonstrates that with 90/10 gas mixture one can see the argon and escape peaks, also for big drift times they are broader (in time) possibly due to diffusion.
-== Electronics ==
-- Nick; The LV module that failed is working fine under load. The pre-amp production is going well.
-== Engineering ==
-- Dave is planing to shut down the interlock systems on FDC and CDC whenever that is convenient.
--->