Analysis of Energetic Particle Confinement in LHD Using Neutron Measurement and Simulation Codes

被引：14

作者：

Nuga, Hideo ^{[1
]}

Seki, Ryosuke ^{[1
,2
]}

Ogawa, Kunihiro ^{[1
,2
]}

Kamio, Shuji ^{[1
]}

Fujiwara, Yutaka ^{[1
]}

Osakabe, Masaki ^{[1
,2
]}

Isobe, Mitsutaka ^{[1
,2
]}

Nishitani, Takeo ^{[1
]}

Yokoyama, Masayuki ^{[1
,2
]}

机构：

[1] Natl Inst Nat Sci, Natl Inst Fus Sci, Toki, Gifu 5095292, Japan

[2] SOKENDAI Grad Univ Adv Studies, Toki, Gifu 5095292, Japan

来源：

PLASMA AND FUSION RESEARCH | 2019年 / 14卷 / Specialissue2期

关键词：

fast ion confinement; neutron emission rate; LHD;

D O I：

10.1585/pfr.14.3402075

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

The fast ion confinement time in the Large Helical Device (LHD) is investigated by using the neutron measurement and simulations. To estimate the fast ion confinement time, a series of short pulse neutral beam (NB) injection experiments have been performed. Additionally, the NB heating simulation code, CONV_FIT3D, has been extended to estimate the neutron emission rate in LHD. We estimate the fast ion confinement time from the differences between the measured and the simulated neutron decay times after the NB is turned off. It is found that the fast ion confinement time of three tangential NBs have similar values tau(c) similar to 0.5 sec and the confinement time of the perpendicular NB is approximately tau(c) similar to 0.06 sec. Additionally, by using the confinement time and the ion ratio data estimated from the simulation result, we can obtain a simulation result similar to the measured data. (C) 2019 The Japan Society of Plasma Science and Nuclear Fusion Research

引用

页数：6

共 21 条

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