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Characterization of Scintillator and Calorimeter PMTs

Characterization of Scintillator and Calorimeter PMTs. Jesse Kruse. Experiment. Goal: To discover light, weakly-coupled new particles such as: Dark photons Dark Higgs bosons Heavy neutral leptons (sterile neutrinos) Axion-like particles

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Characterization of Scintillator and Calorimeter PMTs

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  1. Characterization of Scintillator and Calorimeter PMTs Jesse Kruse

  2. Experiment • Goal: To discover light, weakly-coupled new particles such as: • Dark photons • Dark Higgs bosons • Heavy neutral leptons (sterile neutrinos) • Axion-like particles • How it Works: Light, weakly coupled particles are produced with low in pp scattering, travel tangential to IP, and decay into visible products within the volume

  3. FASER Detector • Located 400 meters away from the line of sight of the ATLAS IP

  4. My Project • Goal: Measure the gain, linearity, and quantum efficiency of scintillator and calorimeter PMTs • What I have done so far: Scintillator PMT gain measurement

  5. Scintillator PMT and LED light source HV Supply, Oscilloscope, and Pulse Generator

  6. Typical PMT Response Histogram of PMT Pulse Area

  7. Future Steps • Measure calorimeter gain, linearity, and QE • Measure scintillator linearity and QE • Replace oscilloscope with digitizer and automate process further • Measure cosmic rays using simple scintillators triggers and FASER calorimeter with calibrated PMTs

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