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arXiv:1909.09343 (physics)
[Submitted on 20 Sep 2019 (v1), last revised 1 Oct 2019 (this version, v2)]

Title:AXEL: High-pressure Xe gas TPC for BG-free $0\nu2β$ decay search

Authors:S. Obara, S. Ban, M. Hirose, A. K. Ichikawa, T. Kikawa, K. Z. Nakamura, T. Nakaya, S. Tanaka, M. Yoshida, Y. Iwashita, H. Sekiya, Y. Nakajima, K. Ueshima, K. Miuchi, K. D. Nakamura, A. Minamino, T. Nakadaira, K. Sakashita
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Abstract:AXEL is a high-pressure xenon gas time projection chamber for neutrinoless double-beta decay (0n2b) search. The AXEL has a unique readout system called ELCC which has a cellular structure and photosensors to detect electroluminescence light produced by ionization electrons. We demonstrated the performance of the ELCC with a small prototype detector (AXEL-HP10L). The obtained energy resolution corresponds to 0.82 -- 1.74% (FWHM) at the 0n2b Q-value. We are constructing a new prototype (AXEL-HP180L) in order to study the energy resolution at the Q-value of 0n2b with a new design of ELCC with unit structure, newly developed electronics board, field-shaping electrodes, and Cockcroft-Walton-type high voltage power supply. For a future 1-ton scale large AXEL detector, we are developing new background-reduction techniques; topology identification with machine learning, positive-ion detection, and active-shield options.
Comments: 10 pages, 6 figures, Proceedings of the 15th Vienna Conference on Instrumentation (VCI2019)
Subjects: Instrumentation and Detectors (physics.ins-det)
Cite as: arXiv:1909.09343 [physics.ins-det]
  (or arXiv:1909.09343v2 [physics.ins-det] for this version)
  https://doi.org/10.48550/arXiv.1909.09343
Related DOI: https://doi.org/10.1016/j.nima.2019.162803

Submission history

From: Shuhei Obara [view email]
[v1] Fri, 20 Sep 2019 06:39:13 UTC (1,827 KB)
[v2] Tue, 1 Oct 2019 02:02:42 UTC (1,827 KB)
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