DRAGON Meeting Minutes 16th Sep 2008


Present CR(Rec), DO, DH, CD, LB, PM, PB, UK, GR


1. Hardware
FSBox leak now located in fixed. FCup was leaking - bellows were twisted somehow. Would require considerable force. Leak is fixed but cup has been left out 
to be beefed up. May throttle cup actuator down to avoid violent insertion. However, should be noted that this cup is usually used for attenuated beam protection, 
i.e it is inserted quickly if count rate on DSSD is seen to be too high - therefore if we throttle it down we must use another cup for this instead. (Lothar suggests gate valve)
The other leak was found on the roughing line - a small hair or thread was seen on an o-ring. The problem in finding these leaks was that the helium response time 
was very slow. Vacuum is now down to 2e-7 Torr - acceptable for MCP operation.

Ion Pump spare part has been ordered. No idea on delivery time.
MCPS: The large foil needs to be replaced. Have more DLC foils ordered and try to make before Ulrike returns. Otherwise Ulrike will make new foils. 


2. Activities.
Many people away for TACTIC run. Test of DSSD is a priority, but only if non-interfering with E810 setup. Will begin to install contamination detectors well in advance 
of beamtime, and perform checks on the electronics to determine if dead-time is a problem.