Isotope effects on particle transport in the Compact Helical System
Isotope effects on particle transport in the Compact Helical System
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同位素对紧凑螺旋系统中粒子传输的影响
DOI：
10.1088/0741-3335/58/5/055011
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发表时间：
2016
影响因子：
2.2
通讯作者：
K. Matsuoka
中科院分区：
文献类型：
--
作者：
K. Tanaka;S. Okamura;T. Minami;K. Ida;D. Mikkelsen;M. Osakabe;Y. Yoshimura;M. Isobe;S. Morita;K. Matsuoka
研究了致密螺旋系统（CHS）中以氢和氘为主的等离子体中粒子输运的氢同位素效应。在关闭气体膨化后，氘优势等离子体中的电子密度衰减时间较长，这表明氘优势等离子体中的再循环更高和/或粒子约束更好。密度调制实验显示了粒子输运系数的定量差异。在相同的磁场和几乎相同的加热功率下，扫描密度从0.8 × 1019 m−3到4 × 1019 m−3。在低密度区（线平均密度< 2.5 × 1019 m−3），氘优势等离子体的粒子扩散率较低，核心向内对流速度较大，而在高密度区（线平均密度>2.5 × 1019 m−3）没有明显差异。这一结果表明，粒子输运的同位素效应只存在于低密度区。与新经典输运系数的比较表明，粒子输运的差异可能是由于湍流驱动的异常输运的差异。研究了离子尺度湍流的线性特性。较小的线性增长率定性地符合低密度状态下氘主导等离子体中粒子输运的减少。
The hydrogen isotope effects of particle transport were studied in the hydrogen and deuterium dominant plasmas of the Compact Helical System (CHS). Longer decay time of electron density after the turning-off of the gas puffing was observed in the deuterium dominant plasma suggesting that the recycling was higher and/or the particle confinement was better in the deuterium dominant plasma. Density modulation experiments showed the quantitative difference of the particle transport coefficients. Density was scanned from 0.8 × 1019 m−3 to 4 × 1019 m−3 under the same magnetic field and almost the same heating power. In the low density regime (line averaged density < 2.5 × 1019 m−3), the lower particle diffusivity and the larger inwardly directed core convection velocity was observed in the deuterium dominant plasma, while in the high density regime (line averaged density >2.5 × 1019 m−3) no clear difference was observed. This result indicates that the isotope effects of particle transport exist only in the low density regime. Comparison with neoclassical transport coefficients showed that the difference of particle transport is likely to be due to the difference of turbulence driven anomalous transport. Linear character of the ion scale turbulence was studied. The smaller linear growth rate qualitatively agreed with the reduced particle transport in the deuterium dominant plasma of the low density regime.
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影响因子：
3.3
作者：
A. Gibson;T. Sekiguchi;K. Lackner;S. Bodner;R. Hancox
通讯作者：
A. Gibson;T. Sekiguchi;K. Lackner;S. Bodner;R. Hancox
紧凑螺旋系统中的等离子体约束物理研究
DOI：
--
发表时间：
2006
期刊：
Journal of the Korean Physical Society 49
影响因子：
--
作者：
S.Okamura;et. al.
通讯作者：
et. al.
LHD 中纹波传输的配置依赖性
DOI：
--
发表时间：
2005
期刊：
Journal of Plasma and Fusion Research 81・2
影响因子：
--
作者：
横山 雅之;渡邊 清政;中島 徳嘉
通讯作者：
中島 徳嘉
用于研究粒子限制的密度调制实验的分析方案
DOI：
--
发表时间：
2006
期刊：
Plasma Science and Technology Vol.8,No.1
影响因子：
--
作者：
K.Tanaka;C.Michael;K.Kawahata;et al.
通讯作者：
et al.