[Halld] [GlueX] GlueX progress

[Mark Macrae Dalton]

Dear Colleagues,

Correction on relative luminosity, should read as follows:


Overnight we ran with 200 nA beam in the PERP configuration achieving only a 24 kHz event rate while 160 nA beam in the PARA configuration gave a 29 kHz event rate.  


Best,
Mark Macrae Dalton



> On Apr 18, 2016, at 7:28 AM, Mark Macrae Dalton <dalton at jlab.org> wrote:
> 
> Dear Colleagues,
> 
> We had a successful weekend of mostly production running with some time used for a few special studies.
> 
> We used 42 hours of beam during the 8 weekend shifts, accumulating ~1250 million triggers for PARA, ~1550 million triggers for PERP and ~540 million triggers unpolarized.  Special studies included some trigger tuning, data with the TRD prototype, and some further study of the relative luminosity of the PARA and PERP configurations.
> 
> The relative luminosity difference is still not completely understood.  Overnight we ran with 200 nA beam in the PARA configuration achieving only a 24 kHz event rate while 160 nA beam in the PERP configuration gave a 29 kHz event rate.  
> 
> We will have the usual run coordination meeting at 8:45 this morning to discuss our final week of running.
> 
> Best,
> Mark Macrae Dalton
> 
> 
> 
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