Title: Optimizing the hit finding algorithm for liquid argon TPC neutrino detectors using parallel architectures

Journal Article · · Journal of Instrumentation
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  1. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  2. Oregon State Univ., Corvallis, OR (United States)
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Neutrinos are particles that interact rarely, so identifying them requires large detectors which produce lots of data. Processing this data with the computing power available is becoming even more difficult as the detectors increase in size to reach their physics goals. Liquid argon time projection chamber (LArTPC) neutrino experiments are expected to grow in the next decade to have 100 times more wires than in currently operating experiments, and modernization of LArTPC reconstruction code, including parallelization both at data- and instruction-level, will help to mitigate this challenge. The LArTPC hit finding algorithm is used across multiple experiments through a common software framework. In this paper we discuss a parallel implementation of this algorithm. Using a standalone setup we find speedup factors of two times from vectorization and 30–100 times from multi-threading on Intel architectures. The new version has been incorporated back into the framework so that it can be used by experiments. On a serial execution, the integrated version is about 10 times faster than the previous one and, once parallelization is enabled, more speedups comparable to the standalone program are achieved.

Research Organization:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
Grant/Contract Number:
AC02-07CH11359
OSTI ID:
1824839
Report Number(s):
FERMILAB-PUB-21-310-SCD; arXiv:2107.00812; oai:inspirehep.net:1875851
Journal Information:
Journal of Instrumentation, Journal Name: Journal of Instrumentation Journal Issue: 01 Vol. 17; ISSN 1748-0221
Publisher:
Institute of Physics (IOP)Copyright Statement
Country of Publication:
United States
Language:
English

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