DRAGON Group minutes   15 Apr 2008

Present: GR, CR, DO, DH, CD, LB, LE, PM, CV, PB, UH (rec)

Hardware
* ED2 problems: cf. PM's elog entries, update 17.04.: ED2 seems to be working again
* gas target: there is a leak problem, DO will exchange the o-ring
* mesh attenuator: still needs some machining, DO working on it
* final slit box vacuum
 - 5e-7 Torr
 - rate of rise between IC and valve is 5 mtorr/min
 - 1 um Mylar window seems to be ok
* MCP voltage dividers are assembled.
- update 18.04.: it appears that when the 4.9 kV are applied there are sparks and the mirrors don't work. 
  Apllying 4 kV seems to work, and coincidences with the IC are seen
* the new baby turbo works and is very fast. It might need a fan for cooling (reached 40). The implementation in 
  EPICs showsa wrong maximum speed.

Software:
* LE wrote a programme to automatically insert and read Hebt2:FC4, DRA:FC1 and DRA:FCCH. It was tested with stable beam.
 - The programme currently stops the MIDAS run to take values, but this could be changed to pause/resume if the run 
   time in the runlog is reliable.
 - It takes about 20 s for the FC reading to reach a plateau.
 - FC4 has an offset.
* some interlocks are missing in EPICS

Electronics
* got a new NIM crate from Grant, we now have all the electronics needed for the run

AOB
* CR will be at a conference next week