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Update on angular acceptance
Bamberg, 19th September 2011 V. Kulikovskiy, Y. Yakovenko and H. Costantini


Status at the Moscow Meeting

Fixed some bugs in a geometry and mirrors Added a dynode stack in geometry description Implemented thin layer optical model

Bamberg, September 2011

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OM scans in Erlangen

4 scans x 2 OMs 8 scans that can be used as inputs in GEANT4 simulation to obtain collection efficiency

Bamberg, September 2011

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OM scans obtained with GEANT4

Example of 2 scans of one OM

Bamberg, September 2011

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Bamberg, September 2011

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A.A. from OM scans

Bamberg, September 2011

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Standard deviation
(%)

cos(theta)

obtained considering the different OM scans

Bamberg, September 2011

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Average Ang. acceptance

Present acceptance Official acceptance Moscow acceptance

Bamberg, September 2011

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40K

coincidence rate

Updated GEANT4 simulation

With Rayleigh scattering Without Rayleigh scattering

16.5 ± 0.9 Hz

18.0 ± 0.9 Hz

Bamberg, September 2011

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