AXEL: High-pressure Xe gas TPC for BG-free $0\nu 2\beta$ decay search

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.

arXiv comment10 pages, 6 figures, Proceedings of the 15th Vienna Conference on Instrumentation (VCI2019)

References in corpus (3)

• Search for Majorana Neutrinos near the Inverted Mass Hierarchy Region with KamLAND-Zen
• The NEXT-100 experiment for neutrinoless double beta decay searches (Conceptual Design Report)
• Electroluminescence collection cell as a readout for a high energy resolution Xenon gas TPC

Cited by in corpus (6)

• Toward the discovery of matter creation with neutrinoless double-beta decay
• Neutral Bremsstrahlung emission in xenon unveiled
• Cosmogenic activation in double beta decay experiments
• Double Beta Decay Experiments at Canfranc Underground Laboratory
• Design and performance of a high-pressure xenon gas TPC as a prototype for a large-scale neutrinoless double-beta decay search
• Neutral Bremsstrahlung in TPCs