Light Source Position Reconstruction with PMT Arrays

Implemented position reconstruction algorithms based on PMT charge distributions, including center-of-gravity and PAF methods, and evaluated spatial resolution.

Research Question

How do PMT-array geometry and reconstruction methods affect light-source position estimates in liquid xenon detector studies?

My work uses PMT charge distributions to study source-position reconstruction, including charge-weighted methods and response-based approaches. The associated 55-PMT readout platform connects waveform processing with event-level light patterns.

My Work

  • Developed and evaluated position-reconstruction algorithms using PMT charge distributions.
  • Used Geant4 simulations to study reconstruction performance.
  • Connected channel-level charge extraction with array-level position estimates.

Array Performance and Scope

The 55-channel R11410 array achieved an overall spatial resolution of approximately 0.66 mm in array performance tests. My responsibilities covered hardware development, DAQ, calibration, Geant4 optical simulation, and reconstruction analysis. I compared center-of-gravity, template-matching, light-response-function, and machine-learning methods. This array result is not a full liquid-xenon TPC resolution.