sPHENIX EMCal discussion

["Phipps, Michael William" <mphipps2 AT illinois.edu>]

Hi all,

Following up on the EMCal segmentation discussion from last week, we've done a series of geant simulations to test the lightguide uniformity/efficiency at different segmentation configurations (0.024 x 0.024; 0.033 x 0.028; 0.034 x 0.034). The results are attached below.

For those I haven't discussed this with before, we did this by scanning up and down the base of the lightguide with 1,000, 2.75 eV photons at each position -- distributed according to the exit characteristics of the scintillating fibers. The sipms are simulated by a series of scoring volumes at the end of the lightguide with the efficiency defined as the % events reaching the scoring volumes. The uniformity is the width of the efficiency distribution from each point along the scan.

Best,

Mike


 

Attachment: Geant4 Study of Lightguide Efficiency_Uniformity.pptx
Description: Geant4 Study of Lightguide Efficiency_Uniformity.pptx