[G14_run] Lowest beam energy

Dr. A.M. Sandorfi sandorfi at jlab.org
Mon Apr 14 17:42:12 EDT 2014


Reinhard,
If I remember correctly, we turned off the lowest part of the tagger during
the gold period so that we could increase the flux and the event rate in the
higher gamma-energy channels.
Andy


On 4/14/14, 4:03 PM, "Reinhard Schumacher" <schumacher at cmu.edu> wrote:

> Hello Franz et al.,
> 
> Dao and I are looking at the g14 gold2 data.  One thing we hadn't
> noticed before is that the photon energy spectrum seems to go from 0.83
> GeV to 2.42 GeV.  Since the beam energy was 2.541 GeV, I thought the
> lowest photon energy would be 20% of this, or 0.51 GeV.  Right now we
> would like to have those events between .51 and .83 GeV.  Is there
> something that we are missing, or is there something about the data that
> killed off those photons?
> 
> Reinhard
> 




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