TY - JOUR
T1 - Development of an alpha-particle imaging detector based on a low radioactivity micro-time-projection chamber
AU - Ito, H.
AU - Hashimoto, T.
AU - Miuchi, K.
AU - Kobayashi, K.
AU - Takeuchi, Y.
AU - Nakamura, K. D.
AU - Ikeda, T.
AU - Ishiura, H.
N1 - Funding Information:
This work was supported by a Grant-in-Aid for Scientific Research on Innovative Areas, 26104004 and 26104008 , from the Japan Society for the Promotion of Science in Japan . This work was supported by the joint research program of the Institute for Cosmic Ray Research (ICRR), the University of Tokyo . We thank Dr. Y. Nakano of the ICRR, University of Tokyo, Japan for providing us with a helium-gas leak detector.
Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2020/2/11
Y1 - 2020/2/11
N2 - An important issue for rare-event-search experiments, such as the search for dark matter or neutrinoless double beta decay, is to reduce radioactivity of the detector materials and the experimental environment. The selection of materials with low radioactive impurities, such as isotopes of the uranium and thorium chains, requires a precise measurement of surface and bulk radioactivity. Focused on the first one, an alpha-particle detector has been developed based on a gaseous micro-time-projection chamber. A low-αμ-PIC with reduced alpha-emission background was installed in the detector. The detector offers the advantage of position sensitivity, which allows the alpha-particle contamination of the sample to be imaged and the background to be measured at the same time. The detector performance was measured by using an alpha-particle source. The measurement with a sample was also demonstrated and the sensitivity is discussed.
AB - An important issue for rare-event-search experiments, such as the search for dark matter or neutrinoless double beta decay, is to reduce radioactivity of the detector materials and the experimental environment. The selection of materials with low radioactive impurities, such as isotopes of the uranium and thorium chains, requires a precise measurement of surface and bulk radioactivity. Focused on the first one, an alpha-particle detector has been developed based on a gaseous micro-time-projection chamber. A low-αμ-PIC with reduced alpha-emission background was installed in the detector. The detector offers the advantage of position sensitivity, which allows the alpha-particle contamination of the sample to be imaged and the background to be measured at the same time. The detector performance was measured by using an alpha-particle source. The measurement with a sample was also demonstrated and the sensitivity is discussed.
KW - Alpha-particle detector
KW - Low background
KW - Position sensitivity
KW - Time projection chamber
KW - μ-PIC
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U2 - 10.1016/j.nima.2019.163050
DO - 10.1016/j.nima.2019.163050
M3 - Article
AN - SCOPUS:85075374352
SN - 0168-9002
VL - 953
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 - 163050
ER -