Speaker
Description
The fidelity of detector simulation is crucial for precision experiments, such as DUNE which uses liquid argon time projection chambers (LArTPCs). We can improve the detector simulation by performing dedicated calibration measurements. Using conventional calibration approaches, typically we are only able to tackle individual detector processes per measurement. However, the detector effects are often entangled in the measured detector output, particularly in LArTPCs. We present a differentiable simulator for a LArTPC which enables gradient-based optimization of the detector simulation by simultaneously fitting multiple relevant modeling parameters. The use of the differentiable simulator allows in-situ calibration which provides natural consistency between the calibration measurements and simulation application. This work also paves a way towards developing an "inverse detector simulation" for mapping the detector output to detector physics quantities of interest.
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