A REST-based Monte Carlo Simulation and Data Analysis Framework for the NνDEx Experiment
Abstract
The NνDEx experiment is designed to search for neutrinoless double-beta decay (0νββ) of 82Se and is planned to be deployed at the China Jinping Underground Laboratory (CJPL). It employs a high-pressure time projection chamber (TPC) filled with 82SeF6 gas and a Topmetal pixelated charge readout system. The high Qββ value of 82Se, together with the track reconstruction capability of a gaseous TPC, provides strong potential for background suppression. In this work, we develop a full simulation and reconstruction framework for the NνDEx experiment based on the REST (Rare Event Searches Toolkit) software framework. To meet the detector-specific requirements of NνDEx, customized simulation processes are implemented to describe the detector geometry, electron drift and diffusion, the Topmetal readout plane, signal formation, and electronics response. These developments enable a complete software description of the detector response from energy deposition to digitized waveforms. A waveform-fitting-based reconstruction method is further applied to the simulated signals to extract the deposited charge and reconstruct the event energy. For simulated signal events, the reconstructed energy resolution reaches a full width at half maximum (FWHM) of less than 1\%, satisfying the design requirement of the experiment. The resulting simulation and reconstruction chain provides a basis for future studies of detector response, background rejection, event classification, and optimization of the NνDEx detector design.
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BibTeX
@misc{huang2026restbased,
title = {{A REST-based Monte Carlo Simulation and Data Analysis Framework for the N$ν$DEx Experiment}},
author = {Siyuan Huang and Tao Li and Hao Qiu and Shaobo Wang},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.23112},
eprint = {2610.23112},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.23112},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - A REST-based Monte Carlo Simulation and Data Analysis Framework for the NνDEx Experiment
AU - Siyuan Huang
AU - Tao Li
AU - Hao Qiu
AU - Shaobo Wang
PY - 2026
DA - 2026/10/16
PB - arXiv
DO - 10.48550/arxiv.2610.23112
UR - https://arxiv.org/abs/2610.23112
AB - The NνDEx experiment is designed to search for neutrinoless double-beta decay (0νββ) of ^82Se and is planned to be deployed at the China Jinping Underground Laboratory (CJPL). It employs a high-pressure time projection chamber (TPC) filled with ^82SeF_6 gas and a Topmetal pixelated charge readout system. The high Q_ββ value of ^82Se, together with the track reconstruction capability of a gaseous TPC, provides strong potential for background suppression. In this work, we develop a full simulation and reconstruction framework for the NνDEx experiment based on the REST (Rare Event Searches Toolkit) software framework. To meet the detector-specific requirements of NνDEx, customized simulation processes are implemented to describe the detector geometry, electron drift and diffusion, the Topmetal readout plane, signal formation, and electronics response. These developments enable a complete software description of the detector response from energy deposition to digitized waveforms. A waveform-fitting-based reconstruction method is further applied to the simulated signals to extract the deposited charge and reconstruct the event energy. For simulated signal events, the reconstructed energy resolution reaches a full width at half maximum (FWHM) of less than 1\%, satisfying the design requirement of the experiment. The resulting simulation and reconstruction chain provides a basis for future studies of detector response, background rejection, event classification, and optimization of the NνDEx detector design.
ER -