[Clas12_software] pathological photons

[L Smith]

Volker,

We saw this in April also for out-bending runs.  My explanation in the attached slides was based on observation in CED of scraping at small angles, causing unreconstructed out-bending tracks and energy deposition in PCAL/EC, which the EB interprets as photons.  The correlation of calorimeter energy and theta arises because these tracks arise from a ‘point’ source and calorimeter theta momentum analyses the tracks.

The question is why for the current outbending run does this not occur for sectors 5 and 6?   

Cole  
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> On Nov 13, 2018, at 3:41 PM, burkert <burkert at jlab.org> wrote:
> 
> In the spirit of giving feedback from an "analyzer' to the software developers I attach a graph from a recent cook of run 5428 that shows the same pathological symptoms as one we have seen during Spring run and that I thought has been fixed. The "photon" band in the right panel is fake.
> 
> Volker
> 
> 
> 
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