Improvement of Plasma Core Confinement Via Electron-Root Realization by Strongly Focused ECRH in LHD: Core Electron-Root Confinement
Improvement of Plasma Core Confinement Via Electron-Root Realization by Strongly Focused ECRH in LHD: Core Electron-Root Confinement
复制标题
通过 LHD 中强聚焦 ECRH 实现电子根来改进等离子体核心限制：核心电子根限制
DOI：
10.13182/fst10-a10791
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发表时间：
2010
影响因子：
0.9
通讯作者：
K. Ohkubo
中科院分区：
文献类型：
--
作者：
T. Shimozuma;M. Yokoyama;K. Ida;Y. Takeiri;S. Kubo;S. Murakami;A. Wakasa;H. Idei;Y. Yoshimura;T. Notake;S. Inagaki;N. Tamura;K. Toi;N. Ohyabu;M. Osakabe;K. Ikeda;K. Tsumori;Y. Oka;K. Nagaoka;O. Kaneko;I. Yamada;K. Narihara;Y. Nagayam;S. Muto;K. Tanaka;T. Tokuzawa;S. Morita;M. Goto;M. Yoshinuma;H. Funaba;T. Morisaki;K. Watanabe;J. Miyazawa;T. Mutoh;T. Watari;K. Ohkubo
摘要 在大型螺旋装置以及其他螺旋装置中观察到的核心电子根限制（CERC）是一种改进的电子能量限制模式。它的特点是核心区域的电子温度分布很高，当中心聚焦电子回旋共振加热功率超过某个阈值时就会出现。该阈值已被澄清为与径向电场 (Er) 从离子根（小负值）到电子根（大于几 kV/m 的大正值）的转变相关，基于 Er 的分叉性质，这是由于新古典输运通量的双极性条件（在非轴对称配置中是特有的）。实验证明，与同向 NBI 相比，反中性束注入 (NBI) 目标等离子体可实现更陡峭的 Te 梯度，并且具有明显的过渡（功率阈值性质）。根据热脉冲传播实验，它被解释为与 NBI 驱动电流感应的有理面或岛有关。输运分析表明，随着CERC等离子体加热功率的增加，电子热输运的增量热扩散率变低，标准热扩散率降低。
Abstract Core electron-root confinement (CERC), observed in the Large Helical Device as well as in other helical devices, is an improved electron energy confinement mode. It is characterized by a highly peaked electron temperature profile in the core region and appears when the centrally focused electron cyclotron resonance heating power exceeds a certain threshold value. This threshold value has been clarified to associate with the transition of the radial electric field (Er) from the ion root (small negative value) to the electron root (large positive value greater than a few kV/m), based on the bifurcation nature of Er due to the ambipolarity condition of neoclassical transport fluxes that is specific in nonaxisymmetric configurations. It has been experimentally recognized that a steeper Te gradient is realized with a clear transition (power threshold nature) in target plasmas with counter neutral beam injection (NBI) than ones with codirectional NBI. It has been interpreted, based on the heat pulse propagation experiment, to be related to the rational surface or the island induced by the NBI-driven current. Transport analyses have shown that the incremental thermal diffusivity of electron heat transport becomes lower, and the standard thermal diffusivity decreases with the increase of heating power in CERC plasmas.
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影响因子：
3.3
作者：
M. Yokoyama;H. Maassberg;C. Beidler;V. Tribaldos;K. Ida;T. Estrada;F. Castejón;A. Fujisawa;T. Minami;T. Shimozuma;Y. Takeiri;A. Dinklage;S. Murakami;Hiroshi Yamada
通讯作者：
M. Yokoyama;H. Maassberg;C. Beidler;V. Tribaldos;K. Ida;T. Estrada;F. Castejón;A. Fujisawa;T. Minami;T. Shimozuma;Y. Takeiri;A. Dinklage;S. Murakami;Hiroshi Yamada
大型螺旋装置与JT-60U等离子体中电子内部传输势垒的比较
DOI：
--
发表时间：
2004
期刊：
Plasma Phys.Control.Fusion 46
影响因子：
--
作者：
K.Ida;et al.
通讯作者：
et al.
影响因子：
1.6
作者：
K. Ida;M. Yoshinuma;Kiyomasa Y. Watanabe;T. Kobuchi;K. Nagaoka
通讯作者：
K. Ida;M. Yoshinuma;Kiyomasa Y. Watanabe;T. Kobuchi;K. Nagaoka
影响因子：
8.6
作者：
Ida, K;Shimozuma, T;Ohyabu, N
通讯作者：
Ohyabu, N
影响因子：
8.6
作者：
Ida, K;Ohyabu, N;Komori, A
通讯作者：
Komori, A