Radial electric field and transport near the rational surface and the magnetic island in LHD
Radial electric field and transport near the rational surface and the magnetic island in LHD
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DOI：
10.1088/0029-5515/44/2/010
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发表时间：
2004-01
期刊：
影响因子：
3.3
通讯作者：
K. Ida;S. Inagaki;N. Tamura;T. Morisaki;N. Ohyabu;K. Khlopenkov;S. Sudo;K. Watanabe;M. Yokoyama;T. Shimozuma;Y. Takeiri;K. Itoh;M. Yoshinuma;Y. Liang;K. Narihara;K. Tanaka;Y. Nagayama;T. Tokuzawa;K. Kawahata;H. Suzuki;A. Komori;T. Akiyama;N. Ashikawa;M. Emoto;H. Funaba;P. Goncharov;M. Goto;H. Idei;K. Ikeda;M. Isobe;O. Kaneko;H. Kawazome;T. Kobuchi;A. Kostrioukov;S. Kubo;R. Kumazawa;S. Masuzaki;T. Minami;J. Miyazawa;S. Morita;S. Murakami;S. Muto;T. Mutoh;Y. Nakamura;H. Nakanishi;Y. Narushima;K. Nishimura;N. Noda;T. Notake;H. Nozato;S. Ohdachi;Y. Oka;M. Osakabe;T. Ozaki;B. Peterson;A. Sagara;T. Saida;K. Saito;S. Sakakibara;R. Sakamoto;M. Sasao;Kuninori Sato;M. Sato;T. Seki;M. Shoji;N. Takeuchi;K. Toi;Y. Torii;K. Tsumori;T. Watari;Y. Xu;H. Yamada;I. Yamada;S. Yamamoto;T. Yamamoto;Y. Yoshimura;I. Ohtake;K. Ohkubo;T. Mito;T. Satow;T. Uda;K. Yamazaki;K. Matsuoka;O. Motojima;M. Fujiwara
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文献类型：
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作者：
K. Ida;S. Inagaki;N. Tamura;T. Morisaki;N. Ohyabu;K. Khlopenkov;S. Sudo;K. Watanabe;M. Yokoyama;T. Shimozuma;Y. Takeiri;K. Itoh;M. Yoshinuma;Y. Liang;K. Narihara;K. Tanaka;Y. Nagayama;T. Tokuzawa;K. Kawahata;H. Suzuki;A. Komori;T. Akiyama;N. Ashikawa;M. Emoto;H. Funaba;P. Goncharov;M. Goto;H. Idei;K. Ikeda;M. Isobe;O. Kaneko;H. Kawazome;T. Kobuchi;A. Kostrioukov;S. Kubo;R. Kumazawa;S. Masuzaki;T. Minami;J. Miyazawa;S. Morita;S. Murakami;S. Muto;T. Mutoh;Y. Nakamura;H. Nakanishi;Y. Narushima;K. Nishimura;N. Noda;T. Notake;H. Nozato;S. Ohdachi;Y. Oka;M. Osakabe;T. Ozaki;B. Peterson;A. Sagara;T. Saida;K. Saito;S. Sakakibara;R. Sakamoto;M. Sasao;Kuninori Sato;M. Sato;T. Seki;M. Shoji;N. Takeuchi;K. Toi;Y. Torii;K. Tsumori;T. Watari;Y. Xu;H. Yamada;I. Yamada;S. Yamamoto;T. Yamamoto;Y. Yoshimura;I. Ohtake;K. Ohkubo;T. Mito;T. Satow;T. Uda;K. Yamazaki;K. Matsuoka;O. Motojima;M. Fujiwara
采用电荷交换光谱法测量极向流的径向分布，ECE法测量电子温度的时间演变，研究了大螺旋装置（LHD）内磁岛的径向电场结构和热输运。当n/m = 1/1的外部扰动场足够大，使LHD磁岛宽度超过临界范围（小半径的15-20%）时，观察到磁岛内部沿磁通量面有涡状等离子体流动。这种对流的极向流导致磁岛内部的非平坦空间势。空间势的曲率符号（∂2Φ/∂r2，其中Φ为空间势）取决于磁岛边界的径向电场。用冷脉冲传播技术研究了磁岛内部的热传输。实验结果表明，磁岛边界存在径向电场切变，磁岛边界和磁岛内部的热输运减小。
The structure of the radial electric field and heat transport at the magnetic island in the large helical device (LHD) are investigated by measuring the radial profile of the poloidal flow with charge exchange spectroscopy and measuring the time evolution of the electron temperature with ECE. A vortex-like plasma flow along the magnetic flux surface inside the magnetic island is observed when the n/m = 1/1 external perturbation field becomes large enough to increase the magnetic island width above a critical range (15–20% of minor radius) in LHD. This convective poloidal flow results in a non-flat space potential inside the magnetic island. The sign of the curvature of the space potential (∂2Φ/∂r2, where Φ is the space potential) depends on the radial electric field at the boundary of the magnetic island. The heat transport inside the magnetic island is studied with a cold pulse propagation technique. The experimental results show the existence of radial electric field shear at the boundary of the magnetic island and a reduction in heat transport at the boundary and inside the magnetic island.