MHD activity in FTU plasmas with reversed magnetic shear
MHD activity in FTU plasmas with reversed magnetic shear
复制标题
具有反向磁剪切的 FTU 等离子体中的 MHD 活性
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
M. Zerbini
中科院分区：
文献类型：
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作者：
P. Buratti;F. Alladio;P. Micozzi;O. Tudisco;L. Acitelli;B. Angelini;M. Apicella;G. Apruzzese;E. Barbato;A. Bertocchi;G. Bracco;A. Bruschi;G. Buceti;A. Cardinali;C. Centioli;R. Cesario;S. Ciattaglia;M. Ciotti;S. Cirant;V. Cocilovo;F. Crisanti;R. Angelis;F. Marco;B. Esposito;D. Frigione;L. Gabellieri;G. Gatti;E. Giovannozzi;C. Gourlan;G. Granucci;M. Grolli;A. Imparato;H. Kroegler;M. Leigheb;L. Lovisetto;G. Maddaluno;G. Maffia;A. Mancuso;M. Marinucci;G. Mazzitelli;F. Mirizzi;F. Orsitto;D. Pacella;L. Panaccione;M. Panella;V. Ridolfini;L. Pieroni;S. Podda;G. Righetti;F. Romanelli;F. Santini;M. Sassi;S. Segre;A. Simonetto;C. Sozzi;S. Sternini;A. Tuccillo;F. Valente;V. Vitale;G. Vlad;V. Zanza;M. Zerbini
在FTU托卡马克装置上研究了具有反向磁剪切的等离子体位形的MHD活动。在存在的对表面具有相同的合理值q = m/n的安全系数，双撕裂模式被激发，在大多数情况下，引起爆发的锯齿状轮廓重排。也发现了更稳定的制度，其中的活动是由旋转饱和模式为主。在一个特定的情况下，在目前的平顶没有任何可检测的MHD活动的放电已经获得。在高温制度（在），一个不规则的活动已被检测到附近的等离子体中心，这可能是由于电阻交换模式的激发。
The MHD activity of plasma configurations with reversed magnetic shear has been investigated on the FTU tokamak. In the presence of pairs of surfaces with the same rational value q = m/n of the safety factor, double-tearing modes are excited which give rise in most cases to bursts of sawtooth-like profile rearrangements. More stable regimes have also been found, in which the activity is dominated by rotating saturated modes. In a particular case with and a discharge without any detectable MHD activity during the current flat-top has been obtained. In high-temperature regimes ( at ), an irregular activity has been detected near the plasma centre which could be due to the excitation of resistive interchange modes.