Measurement of thermal and epithermal neutron flux distribution in the torus hall of LHD using activation method in the first deuterium experiment campaign

Tomoyo Tanaka, Makoto Kobayashi, Sachiko Yoshihashi, Akira Uritani, Kenichi Watanabe, Atsushi Yamazaki, Takeo Nishitani, Kunihiro Ogawa, Mitsutaka Isobe

Research output: Contribution to journalArticlepeer-review

Abstract

In the Large Helical Device (LHD) of the National Institute for Fusion Science, a deuterium plasma experiment was performed in March 2017. Neutrons with an energy of 2.45 MeV are generated by d (d, n) 3He reactions. The evaluation of this neutron flux in the torus hall, as well as within the LHD vessel, is very important for the decommissioning of the LHD in the future and the radiation shielding for workers and components around the LHD. In this study, we evaluate the spatial distribution of thermal and epithermal neutron flux on the floor level of the LHD torus hall by measuring the neutron activation of gold foils. The flux information obtained in the experiment can be used for the evaluation of radio-activation and the shielding design.

Original languageEnglish
Article number5162
JournalPlasma and Fusion Research
Volume14
DOIs
Publication statusPublished - 2019
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Fingerprint

Dive into the research topics of 'Measurement of thermal and epithermal neutron flux distribution in the torus hall of LHD using activation method in the first deuterium experiment campaign'. Together they form a unique fingerprint.

Cite this