Study on Knock-on Tail Formation in Deuteron Velocity Distribution Function Due to ICRF-Heated Energetic Proton by Using Neutron Diagnostics in the Large Helical Device

被引：0

作者：

Umezaki D. ^{[1
]}

Matsuura H. ^{[1
]}

Kimura K. ^{[1
]}

Fukuda T. ^{[1
]}

Ogawa K. ^{[2
,3
]}

Isobe M. ^{[2
,3
]}

Kamio S. ^{[4
]}

Kawamoto Y. ^{[2
]}

Oishi T. ^{[2
,3
]}

机构：

[1] Department of Applied Quantum Physics and Nuclear Engineering, Kyushu University, Fukuoka

[2] National Institute for Fusion Science, National Institutes of Natural Sciences, Toki

[3] The Graduate University for Advanced Studies, SOKENDAI, Toki

[4] Department of Physics and Astronomy, University of California, Irvine, 92697, CA

来源：

Plasma and Fusion Research | 2023年 / 18卷

基金：

日本科学技术振兴机构;

关键词：

ICRF heating; knock-on tail; LHD; NES effect; nuclear elastic scattering;

D O I：

10.1585/PFR.18.2402056

中图分类号：

学科分类号：

摘要：

In fusion plasmas, energetic ions play a crucial role in plasma heating. Nuclear elastic scattering (NES) is a non-Coulombic scattering process that affects the energy transport between energetic and bulk ions. In the Large Helical Device (LHD), energetic protons produced by neutral beam injection (180 keV) formed a knock-on tail (KT) in deuterons via NES, and the DD neutron emission rate increased by one order of magnitude in relatively high-electron-temperature plasmas. Furthermore, the effect of NES among ion cyclotron range of frequency (ICRF) tail protons and bulk deuterons was investigated at high-electron-temperature plasmas in the LHD. It was found that DD neutron emission rate was increased by a factor of 2 to 4. Changes in ion temperature and plasma density cannot be the only reasons for the increase in DD neutron emission rate. The increment in DD neutron emission rate was reproduced by the Fokker-Planck simulation using the Boltzmann collision integral for NES by assuming the ICRF-tail protons having a high-temperature Maxwellian. © 2023 The Japan Society of Plasma Science and Nuclear Fusion Research

引用

共 1 条

[1] Study on Knock-on Tail Formation in Deuteron Velocity Distribution Function Due to ICRF-Heated Energetic Proton by Using Neutron Diagnostics in the Large Helical Device
Umezaki, Daisuke
Matsuura, Hideaki
Kimura, Kento
Fukuda, Takahito
Ogawa, Kunihiro
Isobe, Mitsutaka
Kamio, Shuji
Kawamoto, Yasuko
Oishi, Tetsutaro
PLASMA AND FUSION RESEARCH, 2023, 18

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