Recent advances in the LHD experiment
Recent advances in the LHD experiment
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LHD实验的最新进展
DOI：
10.1088/0029-5515/43/12/013
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发表时间：
2003
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：
O. Motojima;N. Ohyabu;A. Komori;O. Kaneko;H. Yamada;K. Kawahata;Y. Nakamura;K. Ida;T. Akiyama;N. Ashikawa;W. A. Cooper;A. Ejiri;M. Emoto;N. Ezumi;H. Funaba;A. Fukuyama;P. Goncharov;M. Goto;H. Idei;K. Ikeda;S. Inagaki;M. Isobe;S. Kado;H. Kawazome;K. Khlopenkov;T. Kobuchi;K. Kondo;A. Kostrioukov;S. Kubo;R. Kumazawa;Y. Liang;J. Lyon;A. Mase;S. Masuzaki;T. Minami;J. Miyazawa;T. Morisaki;S. Morita;S. Murakami;S. Muto;T. Mutoh;K. Nagaoka;Y. Nagayama;N. Nakajima;Katsuya Nakamura;H. Nakanishi;K. Narihara;Y. Narushima;K. Nishimura;N. Nishino;N. Noda;T. Notake;H. Nozato;S. Ohdachi;Y. Oka;H. Okada;S. Okamura;M. Osakabe;T. Ozaki;B. Peterson;A. Sagara;T. Saida;K. Saito;S. Sakakibara;M. Sakamoto;R. Sakamoto;M. Sasao;Kuninori Sato;M. Sato;T. Seki;T. Shimozuma;M. Shoji;Hajime Suzuki;Y. Takeiri;N. Takeuchi;N. Tamura;K. Tanaka;M. Tanaka;Y. Teramachi;K. Toi;T. Tokuzawa;Y. Tomota;Y. Torii;K. Tsumori;K. Watanabe;T. Watari;Y. Xu;I. Yamada;S. Yamamoto;T. Yamamoto;M. Yokoyama;S. Yoshimura;Y. Yoshimura;M. Yoshinuma;N. Asakura;T. Fujita;T. Fukuda;T. Hatae;S. Higashijima;A. Isayama;Y. Kamada;H. Kubo;Y. Kusama;Y. Miura;T. Nakano;H. Ninomiya;T. Oikawa;N. Oyama;Y. Sakamoto;K. Shinohara;T. Suzuki;H. Takenaga;K. Ushigusa;T. Hino;M. Ichimura;Y. Takase;F. Sano;H. Zushi;T. Satow;S. Imagawa;T. Mito;I. Ohtake;T. Uda;K. Itoh;K. Ohkubo;S. Sudo;K. Yamazaki;K. Matsuoka;Y. Hamada;M. Fujiwara
在头四年的LHD实验中，出现了一些令人鼓舞的结果，其中最重要的是MHD的稳定性和良好的输运在内移轴构型中是兼容的。在此优化构型下观测到的能量约束与ISS95标度一致，增强因子为1.5。对较小的氦加速器的约束增强归因于较高的边缘温度。我们发现，即使违反了Mercier模和压力驱动低n模的理论稳定性条件，平均β为3%的等离子体在这种构型下仍然是稳定的。在NBI和ECR加热的低密度放电中，观察到了内部输运势垒(ITB)和伴随的高中心温度(>；10keV)。在这些放电中测得的径向电场是正的(电子根)，预计将在ITB的形成中发挥关键作用。正如新古典输运理论所预言的那样，正电场也抑制了离子的热扩散率。外加岛的宽度(n/m=1/1)在等离子体与有限β无碰撞时减小，在等离子体碰撞时增大。LHD的ICRF加热是成功的，并探测到了用于少数离子加热的高能尾部(高达500keV)，表明高能粒子具有良好的约束作用。通过测量偏滤器板上的等离子体密度和温度分布，确定了氦-加速器边缘结构所特有的磁力线结构。获得了长脉冲(2min)放电，ICRF功率为0.4 mW，其能量限制特性与短脉冲放电基本相同。
In the first four years of the LHD experiment, several encouraging results have emerged, the most significant of which is that MHD stability and good transport are compatible in the inward shifted axis configuration. The observed energy confinement at this optimal configuration is consistent with ISS95 scaling with an enhancement factor of 1.5. The confinement enhancement over the smaller heliotron devices is attributed to the high edge temperature. We find that the plasma with an average beta of 3% is stable in this configuration, even though the theoretical stability conditions of Mercier modes and pressure driven low-n modes are violated. In the low density discharges heated by NBI and ECR, internal transport barrier (ITB) and an associated high central temperature (> 10 keV) are seen. The radial electric field measured in these discharges is positive (electron root) and expected to play a key role in the formation of the ITB. The positive electric field is also found to suppress the ion thermal diffusivity as predicted by neoclassical transport theory. The width of the externally imposed island (n/m = 1/1) is found to decrease when the plasma is collisionless with finite beta and increase when the plasma is collisional. The ICRF heating in LHD is successful and a high energy tail (up to 500 keV) has been detected for minority ion heating, demonstrating good confinement of the high energy particles. The magnetic field line structure unique to the heliotron edge configuration is confirmed by measuring the plasma density and temperature profiles on the divertor plate. A long pulse (2 min) discharge with an ICRF power of 0.4 MW has been demonstrated and the energy confinement characteristics are almost the same as those in short pulse discharges.
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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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影响因子：
8.6
作者：
Ida, K;Ohyabu, N;Komori, A
通讯作者：
Komori, A
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LHD 配置的限制特性实现了最高 beta 值
DOI：
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发表时间：
2008
期刊：
影响因子：
--
作者：
K. Y. Watanabe;et al.
通讯作者：
et al.
LHD 上长脉冲放电中的等离子体性能和杂质行为，
DOI：
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发表时间：
2003
期刊：
Nuclear Fusion Vol.43, No.4
影响因子：
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作者：
Y.Nakamura;Y.Takeiri;R.Kumazawa;M.Osakabe;et al.
通讯作者：
et al.