Monitoring System for the Gold Target by Radiation Detectors in Hadron Experimental Facility at J-PARC

Ryotaro Muto; Keizo Agari; Kazuya Aoki; Kotaro Bessho; Masayuki Hagiwara; Erina Hirose; Masaharu Ieiri; Ruri Iwasaki; Yohji Katoh; Jun-ichi Kitagawa; Michifumi Minakawa; Yuhei Morino; Kiwamu Saito; Yoshinori Sato; Shin’ya Sawada; Yoshihisa Shirakabe; Yoshihiro Suzuki; Hitoshi Takahashi; Kazuhiro Tanaka; Akihisa Toyoda; Hiroaki Watanabe; Yutaka Yamanoi

doi:10.1051/epjconf/201715307004

All issues

Volume 153 (2017)

EPJ Web Conf., 153 (2017) 07004

Abstract

Open Access

Issue		EPJ Web Conf. Volume 153, 2017 ICRS-13 & RPSD-2016, 13^th International Conference on Radiation Shielding & 19^th Topical Meeting of the Radiation Protection and Shielding Division of the American Nuclear Society - 2016


Article Number		07004
Number of page(s)		6
Section		7. Poster Presentations
DOI		https://doi.org/10.1051/epjconf/201715307004
Published online		25 September 2017

EPJ Web of Conferences 153, 07004 (2017)
https://doi.org/10.1051/epjconf/201715307004

Monitoring System for the Gold Target by Radiation Detectors in Hadron Experimental Facility at J-PARC

Ryotaro Muto^*, Keizo Agari, Kazuya Aoki, Kotaro Bessho, Masayuki Hagiwara, Erina Hirose, Masaharu Ieiri, Ruri Iwasaki, Yohji Katoh, Jun-ichi Kitagawa, Michifumi Minakawa, Yuhei Morino, Kiwamu Saito, Yoshinori Sato, Shin’ya Sawada, Yoshihisa Shirakabe, Yoshihiro Suzuki, Hitoshi Takahashi, Kazuhiro Tanaka, Akihisa Toyoda, Hiroaki Watanabe and Yutaka Yamanoi

High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba, Ibaraki 3050801, Japan

^* Corresponding author: ryotaro.muto@kek.jp

Published online: 25 September 2017

Abstract

At the Hadron Experimental Facility in J-PARC, we inject a 30-GeV proton beam into a gold target to produce secondary particle beams required for various particle and nuclear physics experiments. The gold target is placed in a hermetic chamber, and helium gas is circulated in the chamber to monitor the soundness of the target. The radioactivity in helium gas is continuously monitored by gamma-ray detectors such as a germanium detector and a NaI(Tl) detector. Beam operations with those target-monitoring systems were successfully performed from April to June and October to December 2015, and from May to June 2016. In this paper, the details of the helium gas circulation system and gamma-ray detectors and the analysis results of the obtained gamma-ray spectra are reported.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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