Ref: - F. Benmokhtar et al., Jefferson lab proposal E12-09-007 - F. Benmokhtar: NSF grant # 1615067 - Aerogel mass production for the CLAS12 RICH: Novel characterization methods and optical performance, the RICH collaboration. https ://doi.org/10.1016/j.nima.2017.02.068 Simulation and particle reconstruction Jlab CLAS12 RICH RICH DETECTOR AND SIMULATIONS OF AEROGEL TILES Trotta, Nicholaus and Dr. Benmokhtar, Fatiha A Hybrid Ring-imaging Cherenkov Detector (RICH), located in Hall-B at Jefferson Lab, is used to identify. charged subatomic particles such as pions and kaons in the 3 to 8 GeV/c momentum range. RICH uses the momentum of resulting jet particles from electron scattering on a fixed target. These particles traverse a radiator called, Aerogel in this case. Aerogel is a dielectric material made up of silica and residues of metal oxides. Placing a beam of charged pions at 6 GeV behind the aerogel will produce Cherenkov radiation in the UV to visible range. When a charged particle travels through the aerogel at a very high speed, the particles inside become dipoles. This polarization stretches the shape of the particles and if the incoming particle is moving faster than the speed of light in the medium, Cherenkov radiation is produced. My work consisted on the partition of the aerogel tiles for the RICH detector, and the study of emitted Cherenkov radiation and wave length dependency. This process is important for event reconstructions that will help with particle identification. RICH Detector Using GEMC, a simulation program, to recreate the experiment done with the RICH detector at Jefferson lab. Cherenkov radiation was created from the aerogel with a 6 GeV charged pion beam After applying the different properties for each tile, the simulation could be ran to get a more accurate prediction. The next step will be connect the simulation to the database which contains all the properties of the tiles. The use of same properties in simulation and reconstruction is crucial for particle identification. Soon, my work will extend to refining other components of the detector, mirrors are an example. Cherenkov radiation Each Aerogel tile had to be given their own set of properties, such as absorption length and index of refraction. Aerogel are made of silicon and come in different shapes with an index of refection of n = 1.05. The tiles are divided into two different sections: a 20 mm thickness followed by 30 mm thickness Conclusion Simulating Aerogel Introduction

RICH DETECTOR AND SIMULATIONS OF AEROGEL TILES · 2020. 6. 17. · Using GEMC, a simulation program, to recreate the experiment done with the RICH detector at Jefferson lab. Cherenkov

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Page 1: RICH DETECTOR AND SIMULATIONS OF AEROGEL TILES · 2020. 6. 17. · Using GEMC, a simulation program, to recreate the experiment done with the RICH detector at Jefferson lab. Cherenkov

Ref: - F. Benmokhtar et al., Jefferson lab proposal E12-09-007- F. Benmokhtar: NSF grant # 1615067- Aerogel mass production for the CLAS12 RICH: Novel

characterization methods and optical performance, the RICHcollaboration. https://doi.org/10.1016/j.nima.2017.02.068

Simulation and particle reconstruction

Jlab CLAS12

RICH

RICH DETECTOR AND SIMULATIONS OF AEROGEL TILESTrotta, Nicholaus and Dr. Benmokhtar, Fatiha

A Hybrid Ring-imaging Cherenkov Detector (RICH), located in Hall-B atJefferson Lab, is used to identify. charged subatomic particles such aspions and kaons in the 3 to 8 GeV/c momentum range. RICH uses themomentum of resulting jet particles from electron scattering on a fixedtarget. These particles traverse a radiator called, Aerogel in this case.Aerogel is a dielectric material made up of silica and residues of metaloxides. Placing a beam of charged pions at 6 GeV behind the aerogelwill produce Cherenkov radiation in the UV to visible range. When acharged particle travels through the aerogel at a very high speed, theparticles inside become dipoles. This polarization stretches the shapeof the particles and if the incoming particle is moving faster than thespeed of light in the medium, Cherenkov radiation is produced. Mywork consisted on the partition of the aerogel tiles for the RICHdetector, and the study of emitted Cherenkov radiation and wavelength dependency. This process is important for event reconstructionsthat will help with particle identification.

RICH Detector

Using GEMC, a simulation program, to recreate the experimentdone with the RICH detector at Jefferson lab. Cherenkovradiation was created from the aerogel with a 6 GeV chargedpion beam

After applying the different properties for each tile, thesimulation could be ran to get a more accurate prediction.The next step will be connect the simulation to the databasewhich contains all the properties of the tiles. The use of sameproperties in simulation and reconstruction is crucial forparticle identification. Soon, my work will extend to refiningother components of the detector, mirrors are an example.

Cherenkov radiation

Each Aerogel tile had to be given their own set of properties, such as absorption length and index of

refraction.

Aerogel are made of silicon and come in different shapes with an index of refection of n = 1.05. The tiles are divided into two different sections: a 20 mm thickness followed by 30 mm thickness

Conclusion

Simulating AerogelIntroduction

https://doi.org/10.1016/j.nima.2017.02.068