Explanation of core ion cyclotron emission from beam-ion heated plasmas in ASDEX Upgrade by the magnetoacoustic cyclotron instability

Lunan Liu; R. Ochoukov; K.G. McClements; R.O. Dendy; V. Bobkov; M. Weiland; R. Bilato; H. Faugel; D. Moseev; M. Salewski; Wei Zhang; Xinjun Zhang; Yubao Zhu; B. Chapman; A. Zalzali

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Explanation of core ion cyclotron emission from beam-ion heated plasmas in ASDEX Upgrade by the magnetoacoustic cyclotron instability

机译：磁声回旋加速器升级中梁离子加热等离子体从磁声回旋加速器升级的解释

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Bursts of ion cyclotron emission (ICE), with spectral peaks corresponding to the hydrogen cyclotron harmonic frequencies in the plasma core are detected from helium plasmas heated by sub-Alfvenic beam-injected hydrogen ions in the ASDEX Upgrade tokamak. Based on the fast ion distribution function obtained from TRANSP/NUBEAM code, together with a linear analytical theory of the magnetoacoustic cyclotron instability (MCI), the growth rates of MCI could be calculated. In our theoretical and experimental studies, we found that the excitation mechanism of core ICE driven by sub-Alfvenic beam ions in ASDEX Upgrade is MCI as the time evolution of MCI growth rates is broadly consistent with measured ICE amplitudes. The MCI growth rate is very sensitive to the energy and velocity distribution of beam-injected ions and is suppressed by the slowing down of the dominant beam-injected ion velocity and the spreading of the fast ion distribution profile. This may help to account for the experimental observation that ICE signals disappear within ～3 ms after the NBI turn-off time, much faster than the slowing down times of the beam ions.

机译：离子回气管发射（ICE）的突发，其与等离子芯中的氢气回气频频率对应的光谱峰值从Asdex升级到Kamak中的亚烤束注射的氢离子加热的氦等离子体中检测到。基于从Transp / Nubeam码获得的快速离子分布函数，与磁声回旋加速器不稳定性（MCI）的线性分析理论一起，可以计算MCI的生长速率。在我们的理论和实验研究中，我们发现，随着SUSDEX升级中的亚烤射束离子驱动的核心冰的激励机制是MCI，因为MCI生长速率的时间逐渐与测量的冰幅度一致一致。 MCI生长速率对光束注入离子的能量和速度分布非常敏感，并且通过显着的光束注入的离子速度和快速离子分布曲线的扩展来抑制抑制。这可能有助于考虑实验观察，即在NBI关闭时间之后的冰信号在〜3毫秒内消失，比光束离子的减速时间快得多。

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来源
《Nuclear fusion》 |2021年第2期|026004.1-026004.10|共10页
作者
Lunan Liu; R. Ochoukov; K.G. McClements; R.O. Dendy; V. Bobkov; M. Weiland; R. Bilato; H. Faugel; D. Moseev; M. Salewski; Wei Zhang; Xinjun Zhang; Yubao Zhu; B. Chapman; A. Zalzali;
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作者单位

College of Physics and Optoelectronic Engineering Shenzhen University Shenzhen 518060 China Institute of Plasma Physics Chinese Academy of Sciences Hefei 230031 China;

Max Planck Institute for Plasma Physics Boltzmannstr. 2 D-85748 Garching Germany;

Culham Centre for Fusion Energy Culham Science Centre Abingdon Oxfordshire OX14 3DB United Kingdom of Great Britain and Northern Ireland;

Culham Centre for Fusion Energy Culham Science Centre Abingdon Oxfordshire OX14 3DB United Kingdom of Great Britain and Northern Ireland Centre for Fusion Space and Astrophysics University of Warwick Coventry CV4 7AL United Kingdom of Great Britain and Northern Ireland;

Max Planck Institute for Plasma Physics Boltzmannstr. 2 D-85748 Garching Germany;

Max Planck Institute for Plasma Physics Boltzmannstr. 2 D-85748 Garching Germany;

Max Planck Institute for Plasma Physics Boltzmannstr. 2 D-85748 Garching Germany;

Max Planck Institute for Plasma Physics Boltzmannstr. 2 D-85748 Garching Germany;

Max Planck Institute for Plasma Physics Wendelsteinstra. 1 D-17491 Greifswald Germany;

Technical University of Denmark Department of Physics DK-2800 Kgs. Lyngby Denmark;

Max Planck Institute for Plasma Physics Boltzmannstr. 2 D-85748 Garching Germany;

Institute of Plasma Physics Chinese Academy of Sciences Hefei 230031 China;

Hebei Key Laboratory of Compact Fusion Langfang 065001 China;

Culham Centre for Fusion Energy Culham Science Centre Abingdon Oxfordshire OX14 3DB United Kingdom of Great Britain and Northern Ireland;

Centre for Fusion Space and Astrophysics University of Warwick Coventry CV4 7AL United Kingdom of Great Britain and Northern Ireland;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
原文格式 PDF
正文语种 eng
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关键词
magnetoacoustic cyclotron instability; ion cyclotron emission; sub-Alfvenic beam injected ions; ASDEX Upgrade tokamak;

机译：磁音回旋/不稳定;离子回旋空期;亚烤光束注射离子;Asdex升级到托卡马克;

Explanation of core ion cyclotron emission from beam-ion heated plasmas in ASDEX Upgrade by the magnetoacoustic cyclotron instability

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