Speaker
Description
We present a simulation framework for avalanche development, signal formation, and timing studies in a multi-stack resistive plate chamber (MRPC). The detector model has four stacks of six gas gaps and five strip-readout planes.
Cosmic-ray muon tracks generated with CRY are supplied to TrackHeed to simulate primary ionization in the detector gas. Early avalanches are treated with microscopic electron transport, after which the electrons are transferred to a grid-based calculation including diffusion and space-charge effects. Weighting potentials for readout strips are calculated with a two-dimensional neBEM model and imported as interpolation maps. A reference-strip solution is translated to the remaining strips to avoid repeated field calculations. Targeted refinements were introduced in Garfield++ to preserve disconnected strip boundaries in neBEM calculations and to consistently initialize transport properties for gas gaps not populated by the initial avalanche.
Signals from corresponding strips on the five readout planes are propagated to a common reference plane and combined to construct the differential response. Leading-edge crossing times and time-over-threshold values are then extracted and used for time-walk correction. Preliminary studies demonstrate physically consistent signal formation and enable systematic studies of thresholds, cluster size, efficiency, and timing.