Revision as of 15:39, 9 September 2015

September 3, 2015 Drift Chamber meeting

Connection

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 == FDC update ==
-- Lubomir showed cathode resolution results from the spring run with two different ST+FCAL triggers: run 3137 "standard" trigger and run 3200 excluding 4 additional layers of blocks in the center. Also
+- Lubomir showed cathode resolution results from the spring run with two different ST+FCAL triggers: run 3137 "standard" trigger and run 3200 excluding 4 additional layers of blocks in the center. The resolutions with the inner blocks excluded looks better and now very close to the one (~200 microns) in the fall run. This was achieved by using tighter cuts on the tracks used for the resolution studies; obviously the fact that we had half the energy in the spring explains this. Still, the offsets used for the fall and the spring runs are different and we don't understand why.
-== Engineering ==
+- Studies with 55Fe on the thick cell in the spare package:
-- We have now two new MFC calibrated for 2 l/min max flow. Scot will replace the bad CDC CO2 MFC and we will separate the two gas systems. Scot is also installing additional relief valves at the high pressure lines.
+== Electronics ==
+- The reason for the LV module failure not known yet.
+== Engineering ==
--->
+- Dave is planing to shut down the interlock systems on FDC and CDC whenever that is convenient.