Experiments on NBI plasmas in LHD
Experiments on NBI plasmas in LHD
复制标题
LHD 中的 NBI 等离子体实验
DOI：
10.1088/0741-3335/41/12b/311
复制
发表时间：
1999
影响因子：
2.2
通讯作者：
A. Iiyoshi
中科院分区：
文献类型：
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作者：
M. Fujiwara;O. Kaneko;A. Komori;H. Yamada;N. Ohyabu;K. Kawahata;P. deVries;M. Emoto;H. Funaba;M. Goto;K. Ida;H. Idei;S. Inagaki;N. Inoue;S. Kado;S. Kubo;R. Kumazawa;S. Masuzaki;T. Minami;J. Miyazawa;T. Morisaki;S. Morita;S. Murakami;S. Muto;T. Mutoh;Y. Nagayama;Y. Nakamura;H. Nakanishi;K. Narihara;K. Nishimura;N. Noda;T. Kobuchi;S. Ohdachi;Y. Oka;M. Osakabe;T. Ozaki;B. Peterson;A. Sagara;S. Sahkibara;R. Sakamoto;H. Sasao;M. Sasao;Kuninori Sato;M. Sato;T. Seki;T. Shimozuma;M. Shoji;Hajime Suzuki;Y. Takeiri;K. Tanaka;K. Toi;T. Tokuzawa;K. Tsumori;K. Tsuzuki;I. Yamada;S. Yamaguchi;M. Yokoyama;K. Watanabe;T. Watari;Y. Hamada;K. Itoh;K. Matsuoka;K. Murai;K. Ohkubo;I. Ohtake;M. Okamoto;S. Satoh;T. Satow;S. Sudo;S. Tanahashi;K. Yamazaki;O. Motojima;A. Iiyoshi
中性束注入(NBI)加热始于大型螺旋装置的第二个实验阶段(1998年9月至12月)，采用两条切向束线。在100keV的氢气中，典型的1 S的束流端口注入功率高达3.7 mW。能量限制系统地好于国际星系学家的预测，将95提高到1.5倍。观测到的基座温度有助于这种增强。我们还演示了LHD中NBI的长脉冲放电。通过0.7 mW的束流注入，密度为0.3×10~(19)m~(-3)的等离子体持续了22个S，在长脉冲放电中观察到了独特的长时间尺度的等离子体数量振荡现象。Nb放电的一个主题是Nb可以单独启动等离子体。这项技术对于具有限制高能离子的真空磁场的螺旋系统来说是独一无二的，并且对于螺旋系统来说，它对于摆脱磁场强度的限制是有用的，磁场强度必须与电子回旋共振加热(ECH)所需的频率一致。
Neutral beam injection (NBI) heating started in the second experimental campaign of the Large Helical Device (September to December 1998) by two tangential beam lines. With 100 keV hydrogen, the beam port through power of up to 3.7 MW was injected for 1 s typically. The energy confinement was systematically better than that predicted by the International Stellerator Scaling 95 up to a factor of 1.5. The temperature pedestal observed contributes to this enhancement. We have also demonstrated a long pulse discharge by NBI in the LHD. By injecting 0.7 MW of beam, a plasma with a density of 0.3 × 1019 m-3 was sustained for 22 s. A unique oscillating phenomenon of plasma quantities with a long time scale was observed in the long pulse discharge. One of the topics of NB discharge is that the plasma can be started up by NB alone. This technique is unique for helical systems that have a vacuum magnetic field confining high energy ions, and it is useful for helical systems to be free from the constraint of magnetic field strength that must coincide with the frequency required by electron cyclotron resonance heating (ECH).
S. Sudo、Y. Nagayama、M. Emoto、M. Goto、Y. Hamada、K. Ida、T. Ido、H. Iguchi、S. Inagaki、M. Isobe、K. Kawahata、K. KMopenkov、S.
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