Abstract
We apply deep neural networks (DNN) to data from the EXO-200 experiment. In the studied cases, the DNN is able to reconstruct the relevant parameters - total energy and position - directly from raw digitized waveforms, with minimal exceptions. For the first time, the developed algorithms are evaluated on real detector calibration data. The accuracy of reconstruction either reaches or exceeds what was achieved by the conventional approaches developed by EXO-200 over the course of the experiment. Most existing DNN approaches to event reconstruction and classification in particle physics are trained on Monte Carlo simulated events. Such algorithms are inherently limited by the accuracy of the simulation. We describe a unique approach that, in an experiment such as EXO-200, allows to successfully perform certain reconstruction and analysis tasks by training the network on waveforms from experimental data, either reducing or eliminating the reliance on the Monte Carlo.
Original language | English |
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Article number | P08023 |
Journal | Journal of Instrumentation |
Volume | 13 |
Issue number | 8 |
DOIs | |
State | Published - Aug 29 2018 |
Externally published | Yes |
Funding
We thank Adam Coates (Baidu) for helpful and encouraging discussions and Evan Racah (NERSC, LBNL) for support of deep learning applications at NERSC at the beginning of this work. We thank the Erlangen Regional Computing Center (RRZE) for the compute resources and support. We thank the Deutsche Forschungsgemeinschaft (DFG) for the support of this study. EXO-200 data analysis and simulation uses resources of the National Energy Research Scientific Computing Center (NERSC), which is supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. We gratefully acknowledge the support of Nvidia Corporation with the donation of the Titan Xp GPU used for this research. We thank Adam Coates (Baidu) for helpful and encouraging discussions and Evan Racah (NERSC, LBNL) for support of deep learning applications at NERSC at the beginning of this work. We thank the Erlangen Regional Computing Center (RRZE) for the compute resources and support. We thank the Deutsche Forschungsgemeinschaft (DFG) for the support of this study. EXO-200 data analysis and simulation uses resources of the National Energy Research Scientific Computing Center (NERSC), which is supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. EXO-200 is supported by DOE and NSF in the U.S., NSERC in Canada, SNF in Switzerland, IBS in Korea, RFBR in Russia, DFG in Germany, and CAS and ISTCP in China. We gratefully acknowledge the KARMEN Collaboration for supplying the cosmic-ray veto detectors, and the WIPP for their hospitality.
Keywords
- Analysis and statistical methods
- Double-beta decay detectors
- Pattern recognition, cluster finding, calibration and fitting methods
- Time projection chambers