The performance of ICRF heated plasmas in LHD
The performance of ICRF heated plasmas in LHD
复制标题
ICRF 加热等离子体在 LHD 中的性能
DOI：
10.1088/0029-5515/41/3/310
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发表时间：
2001
期刊：
影响因子：
3.3
通讯作者：
M. Fujiwara
中科院分区：
文献类型：
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作者：
T. Watari;T. Mutoh;R. Kumazawa;T. Seki;K. Saito;Y. Torii;Y. Zhao;D. Hartmann;H. Idei;S. Kubo;K. Ohkubo;M. Sato;T. Shimozuma;Y. Yoshimura;K. Ikeda;O. Kaneko;Y. Oka;M. Osakabe;Y. Takeiri;K. Tsumori;N. Ashikawa;P. Vries;M. Emoto;A. Fukuyama;H. Funaba;M. Goto;K. Ida;S. Inagaki;N. Inoue;M. Isobe;K. Itoh;S. Kado;K. Kawahata;T. Kobuchi;K. Khlopenkov;A. Komori;A. Krasilnikov;Y. Liang;S. Masuzaki;K. Matsuoka;T. Minami;J. Miyazawa;T. Morisaki;S. Morita;S. Murakami;S. Muto;Y. Nagayama;H. Nakanishi;K. Narihara;K. Nishimura;N. Noda;A. Notake;S. Ohdachi;N. Ohyabu;H. Okada;M. Okamoto;T. Ozaki;R. Pavlichenko;B. Peterson;A. Sagara;S. Skakibara;R. Sakamoto;H. Sasao;M. Sasao;Kuninori Sato;T. Satow;M. Shoji;S. Sudo;H. Suzuki;M. Takechi;N. Tamura;S. Tanahashi;K. Tanaka;K. Toi;T. Tokuzawa;K. Watanabe;T. Watanbe;H. Yamada;I. Yamada;S. Yamaguchi;S. Yamamoto;K. Yamazaki;M. Yokoyama;Y. Hamada;O. Motojima;M. Fujiwara
1999年LHD第三次发射进行了离子回旋加速器频率范围（ICRF）加热实验。向等离子体注入1.35 MW ICRF功率，获得200 kJ存储能量，仅在ECH终止后ICRF功率才维持5 s。杂质问题被彻底克服，脉冲长度在 0.7 MW 的功率水平下很容易延长至 68 秒。该放电演示了液体存根调谐器在稳态等离子体加热中的实用性。 ICRF加热等离子体的能量约束时间对等离子体参数的依赖性与ISS95仿星器缩放倍数为1.5相同，其效率与NBI相当。这种性能的改进是通过多种手段实现的，包括：（a）扫描磁场强度和少数浓度，（b）由于磁轴移动而改善粒子轨道，以及（c）通过钛吸杂和使用碳偏滤器板减少杂质离子的数量。在优化的加热机制中，离子加热是主要的加热机制，与 CHS 和 W7-AS 不同。由于加热质量高且参数范围远远超出以往的实验，该实验可以视为仿星器中 ICRF 加热的首次完整演示。
An ion cyclotron range of frequency (ICRF) heating experiment was conducted in the third campaign of LHD in 1999. 1.35 MW of ICRF power were injected into the plasma and 200 kJ of stored energy were obtained, which was maintained for 5 s by ICRF power only after the termination of ECH. The impurity problem was so completely overcome that the pulse length was easily extended to 68 s at a power level of 0.7 MW. The utility of a liquid stub tuner in steady state plasma heating was demonstrated in this discharge. The energy confinement time of the ICRF heated plasma has the same dependences on plasma parameters as those of the ISS95 stellarator scaling with a multiplication factor of 1.5, which is a high efficiency comparable to that of NBI. Such an improvement in performance was obtained by various means, including: (a) scanning of the magnetic field intensity and minority concentration, (b) improvement of particle orbits due to a shift of magnetic axis and (c) reduction of the number of impurity ions by means of titanium gettering and the use of carbon divertor plates. In the optimized heating regime, ion heating turned out to be the dominant heating mechanism, unlike in CHS and W7-AS. Owing to the high quality of the heating and the parameter range being extended far beyond that of previous experiments, the experiment can be regarded as the first complete demonstration of ICRF heating in stellarators.
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.