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A Verification Scenario of Nuclear Plus Interference Scattering Effects Using Neutron Incident Angle Distribution to the Wall in Beam-Injected Deuterium Plasmas

Shota SUGIYAMA, Hideaki MATSUURA, Daisuke Uchiyama, Daisuke SAWADA, Tsuguhiro WATANABE¹⁾, Osamu MITARAI²⁾ and Takuya GOTO¹⁾

Department of Applied Quantum Physics and Nuclear Engineering, Kyushu University, 744 Motooka, Fukuoka 819-0395, Japan

1)

National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan

2)

Kumamoto Liberal Arts Education Center, Tokai University, 9-1-1 Toroku, Higashiku, Kumamoto 862-8652, Japan

(Received 25 November 2014 / Accepted 2 February 2015 / Published 26 May 2015)

Abstract

A verification scenario of knock-on tail formation in the deuteron distribution function due to nuclear plus interference scattering is presented by observing the incident angle distribution of neutrons in a vacuum vessel. Assuming a knock-on tail created in a ³He-beam-injected deuterium plasma, the incident angle distribution and energy spectra of the neutrons produced by fusion reactions between 1-MeV and thermal deuterons are evaluated. The relation between the neutron incident angle to the vacuum vessel and neutron energy is examined in the case of anisotropic neutron emission due to knock-on tail formation in neutral-beam-injected plasmas.

Copyright (c) 2015 The Japan Society of Plasma Science and Nuclear Fusion Research

Keywords

nuclear plus interference scattering, fast-ion velocity distribution function, neutron emission spectrum, beam-injected deuterium plasma, neutron incident angle distribution, neutron incident energy spectrum, Large Helical Device

DOI: 10.1585/pfr.10.3403055

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This paper may be cited as follows:

Shota SUGIYAMA, Hideaki MATSUURA, Daisuke Uchiyama, Daisuke SAWADA, Tsuguhiro WATANABE, Osamu MITARAI and Takuya GOTO, Plasma Fusion Res. 10, 3403055 (2015).