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Prediction of Neutron Emission Rate in Deuterium Neutral Beam Heated CFQS Plasmas Using FIT3D-DD Code

Ryosuke SEKI¹⁾, Kunihiro OGAWA^1,2), Mitsutaka ISOBE^1,2), Sadayoshi MURAKAMI³⁾, Hideo NUGA¹⁾, Akihiro SHIMIZU^1,2), Shoichi OKAMURA¹⁾, Hiromi TAKAHASHI^1,2), Tetsutaro OISHI^1,2), Shigeyoshi KINOSHITA¹⁾, Takanori MURASE¹⁾, Sho NAKAGAWA¹⁾, Hiroyuki TANOUE¹⁾, Masaki OSAKABE^1,2), Haifeng LIU⁴⁾ and Yuhong XU⁴⁾

1)

National Institute for Fusion Science, National Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki-city, Gifu 509-5292, Japan

2)

The Graduate University for Advanced Studies, SOKENDAI, 322-6 Oroshi-cho, Toki-city, Gifu 509-5292, Japan

3)

Kyoto University, Kyoto 615-8540, Japan

4)

Southwest Jiaotong University, Sha Xi Mei Shi Yi Tiao Jie, Jinniu District, Chengdu, Sichuan, China

(Received 8 January 2022 / Accepted 24 March 2022 / Published 22 June 2022)

Abstract

FIT3D-DD code, which is a neutron emission and heating efficiency evaluation code based on a simple analytical solution of the Fokker-Planck equation, was applied to deuterium Chinese first quasi-axisymmetric stellarator (CFQS) plasmas heated by a deuterium neutral beam injector. A database of the neutron emission rate due to the beam-bulk D-D fusion reaction in the CFQS was created with the electron temperature and density, which were evaluated from the energy confinement time using ISS04 scaling. The neutron emission rate increases monotonically with the increase in the electron temperature and density. The neutron emission rate is expected to be up to ∼2.7 × 10¹² [n/s] for an electron density of less than 4 × 10¹⁹ m⁻³.

Copyright (c) 2022 The Japan Society of Plasma Science and Nuclear Fusion Research

Keywords

quasi-axisymmetric stellarator, CFQS, prediction of neutron emission rate, a simple Fokker-Planck code, FIT3D-DD

DOI: 10.1585/pfr.17.2403063

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