Analysis of mRICH Simulation for Beam Test Run 120
Explore the mRICH Simulation Analysis conducted for Beam Test Run 120 at Georgia State University. The analysis includes detecting expected ring radius and center using simulation, quantum efficiency analysis, and result interpretation. Findings and to-do list for further analysis are discussed.
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Presentation Transcript
mRICH Simulation Analysis for Beam Test run 120 Cheuk-Ping Wong Georgia State University 11-07-2016
Beam Test run 120 Setup Detector Aerogel gel: thickness 3.3mm, n=1.03 Fresnel lens: f=3 or 76.2mm Beam 8 GeV pion Beam position (x,y)~(-24,-24)mm Rings are not centered, and ring size has not been studied 5/28/2025 Cheuk-Ping Wong (GSU) 2
Finding Expected Ring radius and Ring Center Using Simulation Launch 8 GeV pion at (x,y)=(-24,-24) mm with infinitesimal beam size Quantum efficiency analysis Using Hough transform algorithm with infinitesimal pixel size Ignore the hits that are sit at the corner (due to internal reflection inside glass window, see next slide). If x<-20 and y<-20, ignore. Uncertainty r (0.44 mm) is from simulation with centered ring (beam launched toward the center of sensor plane) If a hit falls between r 3 r of a possible ring, the hit is on the ring applied in Example of a single event from simulation x : signal (photons emitted by pion inside the aerogel) o : noise 5/28/2025 Cheuk-Ping Wong (GSU) 3
Finding Expected Ring radius and Ring Center Using Simulation All found rings in each event are filled in a three-dimensional (a,b,r) histogram The expected values (a,b,r) are from the most densest bin of dimensional histogram extracted the three- All rings found in one run 5/28/2025 Cheuk-Ping Wong (GSU) 4
Result Accumulated hit map Draw from TTree. no Q.E. applied Pixelated display Infinitesimal pixel size Center position (a,b)=(2.5, 2.5) mm Radius r=17.3 mm (6x6mm2 pixel size) / 17.3+3.54=20.84 mm (Infinitesimal pixel size) 5/28/2025 Cheuk-Ping Wong (GSU) 5
To Do List Continue run 120 analysis Reanalyze run 140 (try to reduce noise) Paper for beam test 5/28/2025 Cheuk-Ping Wong (GSU) 6
