TY - JOUR
T1 - AXEL
T2 - High-pressure Xe gas TPC for BG-free 0ν2β decay search
AU - Obara, S.
AU - Ban, S.
AU - Hirose, M.
AU - Ichikawa, A. K.
AU - Kikawa, T.
AU - Nakamura, K. Z.
AU - Nakaya, T.
AU - Tanaka, S.
AU - Yoshida, M.
AU - Iwashita, Y.
AU - Sekiya, H.
AU - Nakajima, Y.
AU - Ueshima, K.
AU - Miuchi, K.
AU - Nakamura, K. D.
AU - Minamino, A.
AU - Nakadaira, T.
AU - Sakashita, K.
N1 - Funding Information:
We would like to thank the VCI 2019 organization committee for this opportunity to present the AXEL project. The AXEL project is supported by the Grant-in-Aid for Japan Society for the Promotion of Science Fellows Grant Number 15H02088, 16J09462, 17K18777, 17J00268, 18J13957, 18J00365, 18J20453, 18K13567, and 18H05540. We also thank the Institute for Cosmic Ray Research and the Kamioka underground laboratories, University of Tokyo for their support of our project.
Funding Information:
We also thank the Institute for Cosmic Ray Research and the Kamioka underground laboratories, University of Tokyo for their support of our project.
Funding Information:
The AXEL project is supported by the Grant-in-Aid for Japan Society for the Promotion of Science Fellows Grant Number 15H02088 , 16J09462 , 17K18777 , 17J00268 , 18J13957 , 18J00365 , 18J20453 , 18K13567 , and 18H05540 .
Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2020/4/1
Y1 - 2020/4/1
N2 - AXEL is a high-pressure xenon gas time projection chamber for neutrinoless double-beta decay (0ν2β) 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 0ν2β Q-value. We are constructing a new prototype (AXEL-HP180L) in order to study the energy resolution at the Q-value of 0ν2β 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.
AB - AXEL is a high-pressure xenon gas time projection chamber for neutrinoless double-beta decay (0ν2β) 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 0ν2β Q-value. We are constructing a new prototype (AXEL-HP180L) in order to study the energy resolution at the Q-value of 0ν2β 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.
KW - Double beta decay
KW - Gas detector
KW - Majorana neutrino
KW - Xenon
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U2 - 10.1016/j.nima.2019.162803
DO - 10.1016/j.nima.2019.162803
M3 - Article
AN - SCOPUS:85072844770
SN - 0168-9002
VL - 958
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
M1 - 162803
ER -