Minutes of the DRAGON Meeting  5 Feb., 2008

  Present:  DAH,CAD,LB,CV,CR,GR,UH,DO,PM,

  The Minutes of the previous meeting were not disapproved. (I like this format  - CR)

1) Hardware
   Modification of lead shield, done, but needs to be painted
   Jobs in the Wokshop will be finished next week -- but there
     was a problem with the hole spacing on the collar -- this
     was discovered and fixed.
   Progress on other jobs as well.
   Conflat flanges arrived yesterday.
   Ready to involve beamlines group.

2) Acceptance/GEANT
   Original GEANT alpha transmission 85(2)%
   Some changes to Q1 & Q2 vertical position: reduces transmission
     but then transmission is actually improved with stronger 
     steering.
   Once system is under vacuum again, go back to acceptance
     measurements.  Source position vs. steering.
   CR will discuss later what the plan should be.
   CR: al & Mg as beam (GB); 10 shifts for DRAGON?  Begin run
     as early as April?

3) Pepper pot for gas target to provide a means of normalization.
   Combination of fine meshes and micr-porous material. micro-
     porous material has 1-20 um hole size and is 10 um thick.
     Each foil is a factor of 10 attenuation.  But foils would
     melt in beam --> so use meshes, but with random orientation,
     also lots of scattering.  But only the scattering from the 
     last mesh woul contribute.
   Use pepperpots at low energy beam?

4) CV discussed many talks heard at the ``Workshop of Astronomy
     with Radioactivity'' (Bavaria, sponsored by Max Planck 
     Institute).  40 particpants.  SN modelling talks.  Differing
     mechanisms for explosion, multiple processes discussed. 
     X-ray burst stars.  44Ti coming from high velocity
     region where Fe is seen.  511 keV from inner disk -- hot
     low-mass binaries.