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arXiv · 2302.10725

First reconstruction of absolute three-dimensional position of nuclear recoils using a negative ion $\mu$-TPC for dark matter search experiments

Satoshi Higashino·Takuya Shimada·Tomonori Ikeda·Hirohisa Ishiura·Ryo Kubota·Ayaka Nakayama·Mizuno Ofuji·Kentaro Miuchi
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Abstract

Studies of micro time projection chambers using negative ion gas (NI$\mu$TPC) are conducted especially for direction-sensitive dark matter searches. A NI$\mu$TPC enables to measure the absolute position in the drift direction for self-triggering TPCs. This study provides a development of a NI$\mu$TPC using a micro pixel chamber ($\mu$-PIC) with dedicated readout electronics, and an evaluation of the capability of three-dimensional absolute position reconstruction of nuclear recoil using a neutron source. The absolute track position was reconstructed throughout the drift volume with an efficiency of 70$\pm$5%. This work marks an important step for the NI$\mu$TPCs towards the practical use for directional dark matter searches.

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Satoshi Higashino, Takuya Shimada, Tomonori Ikeda, Hirohisa Ishiura, Ryo Kubota, Ayaka Nakayama, Mizuno Ofuji, Kentaro Miuchi. 2023-02-21. First reconstruction of absolute three-dimensional position of nuclear recoils using a negative ion $\mu$-TPC for dark matter search experiments. https://arxiv.org/abs/2302.10725

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