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Highly-parallelized simulation of a pixelated LArTPC on a GPU
Meyer, Holger Muether, Mathew Roy, P. Solomey, Nickolas DUNE Collaboration
Meyer, Holger
Muether, Mathew
Roy, P.
Solomey, Nickolas
DUNE Collaboration
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2023-04-26
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Article
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Keywords
Detector modelling and simulations II,Simulation methods and programs,Noble liquid detectors,Time projection chambers,TPC,Electric fields,Charge transport,Multiplication and induction,Electron emission,Scintillation,Ionization,Double-phase
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Citation
A. Abed Abud et al 2023 JINST 18 P04034. DOI 10.1088/1748-0221/18/04/P04034
Abstract
The rapid development of general-purpose computing on graphics processing units (GPGPU) is allowing the implementation of highly-parallelized Monte Carlo simulation chains for particle physics experiments. This technique is particularly suitable for the simulation of a pixelated charge readout for time projection chambers, given the large number of channels that this technology employs. Here we present the first implementation of a full microphysical simulator of a liquid argon time projection chamber (LArTPC) equipped with light readout and pixelated charge readout, developed for the DUNE Near Detector. The software is implemented with an end-to-end set of GPU-optimized algorithms. The algorithms have been written in Python and translated into CUDA kernels using Numba, a just-in-time compiler for a subset of Python and NumPy instructions. The GPU implementation achieves a speed up of four orders of magnitude compared with the equivalent CPU version. The simulation of the current induced on 103 pixels takes around 1 ms on the GPU, compared with approximately 10 s on the CPU. The results of the simulation are compared against data from a pixel-readout LArTPC prototype.
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Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
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IOP Publishing
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Journal of Instrumentation
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1748-0221