20 Feb., 2007     DRAGON Meeting minutes

Present:  MT, CR, CD*, CV, DO, LB, SF, PM, GR, AC

1. Minutes of previous meeting.
   Approved with no corrections.

2. Acceptance update and plans.
   CR:  We are not well focused on the mass slits - difference
   between 0% to -5% mis-tune on Q1.
   Dave O is installing the DSSSD at Turbo-pump 7.  Then we will go to
   the final slits.
   We want to look at RAYTRACE again.  GEANT not simulating reality.
   DO:  Put detector in TP7 but had leaks; had to get O-ring right.
   CR:  Detector was cleaned with ethanol after liquid freon from 'air duster' got on it.
   Don Hunter had original RAYTRACE files; DH took a lot of it over.
   CR:  Most important to go to end as soon as TP7 measurement is done.

3. 40Ca analysis short update
   CV ran different scenarios on strong resonances for BGO spectra/
   efficiencies.  Results: efficiencies are slightly higher than the
   data, except very good agreement at lower threshold.  Lots of stuff around the threshold.  
   Perhaps noise or uncertainty of threshold setting affecting simulated eff.  Will check 
   input file again.

4. 22Na lifetime
   GR:  ROOT bug giving him problems.

   CR:  Seattle don't want to use our DAQ system; they want to use
   `tried and true' [and old] system used before.

5. Solar cell plans
   CR shows prototype
   70 cells were ordered.

6. A.O.B.
   -schedule news
    TUDA would be able to do an experiment whatever happens.
    19 April: stable beam for TUDA.
   -C.R: designer going [gone?] on vacation so we are trying to get
    job passed off to another.  Must get bumped up in priority.
   -22Na source
    CR to do paperwork for Safety.  Must find a desiccator to store them.
   -MT hooked up current source to FC4: perfectly stable.
    Test IN/OUT as in run.
   -PM problem with bias ring wire on the Final FC; fixed.  May not, but
    could have been intermittent.
   -PM Turbo pumps half-speed mode not working.  Do we need it?  Why not
    just turn them off?
   -PM dirt in vacuum system [when foils fail?]
    Please keep it clean.

*sec.