Magnetic separatrix experiments in JET
Magnetic separatrix experiments in JET
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DOI：
10.1088/0029-5515/27/11/011
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发表时间：
1987-11
期刊：
影响因子：
3.3
通讯作者：
A. Tanga;K. Behringer;A. Costley;M. Brusati;B. Denne;A. Edwards;A. Gibson;R. Gill;N. Gottardi;R. Granetz;P. Harbour;H. Jäckel;M. Keilhacker;E. Lazzaro;M. Malacarne;P. Morgan;P. Noll;J. O'Rourke;P. Stott;D. Summers;J. Tagle;P. Thomas
中科院分区：
文献类型：
--
作者：
A. Tanga;K. Behringer;A. Costley;M. Brusati;B. Denne;A. Edwards;A. Gibson;R. Gill;N. Gottardi;R. Granetz;P. Harbour;H. Jäckel;M. Keilhacker;E. Lazzaro;M. Malacarne;P. Morgan;P. Noll;J. O'Rourke;P. Stott;D. Summers;J. Tagle;P. Thomas
对于高达3 mA的等离子体电流，已经在JET中产生了磁隔离线配置。实验结果表明，偏滤器托卡马克可以获得偏滤器托卡马克的一些共同特征。在欧姆放电中，可以产生高回收制度。在中性束加热放电中，能量限制时间与H模的特征特征一起得到了显著的改善。这些特征包括改进的粒子限制，更平坦的密度分布，以及电子温度的增加，特别是在边缘，导致了特有的基座特征。在较高的中性束功率下，等离子体密度较高，束穿透性能恶化，等离子体外围辐射损失较大。观察到H模的整体能量限制时间随功率的增加而减小。然而，径向功率平衡分析的结果表明，在辐射不重要的中心区域，约束退化较小。
Magnetic separatrix configurations have been produced in JET for plasma currents of up to 3 MA. Experimental results obtained with these configurations show that some features can be achieved that are common to divertor tokamaks. In Ohmic discharges, high recycling regimes can be produced. In neutral beam heated discharges, substantial improvement of the energy confinement time is achieved together with the characteristic signatures of an H-mode. These characteristics include improved particle confinement, flatter density profile, and an increase in electron temperature especially at the edge, leading to a characteristic pedestal feature. At higher neutral beam power, higher plasma densities are reached, with deterioration of beam penetration and strong radiation losses in the outer region of the plasma. The global energy confinement time in the H-mode is observed to degrade with additional power. However, results of radial power balance analysis suggest that in the central region, where the radiation is not important, the degradation of confinement is small.