ICRF HEATING IN TOKAMAKS
ICRF HEATING IN TOKAMAKS
复制标题
托卡马克中的 ICRF 加热
DOI：
10.1051/jphyscol:1977616
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发表时间：
1977
期刊：
影响因子：
--
通讯作者：
H. Takahashi
中科院分区：
文献类型：
--
作者：
H. Takahashi
本文介绍了ICRF加热托卡马克等离子体的现状。两个方面的主题进行了讨论：物理波阻尼和离子加热的评价。最近的实验在几个托卡马克装置在二次谐波的氘核回旋频率表现出很大的差异之间的观察和预测波阻尼。一个可能的解释，基于增强的回旋谐波阻尼由于接近的两个离子的混合和回旋共振层，进行了讨论。求解了非均匀双离子等离子体中快波传播的边值问题，得到了波场结构。对于适度的质子浓度（小于5%），在左手极化电场的陡峭梯度被发现在混合和回旋共振层之间的区域。该梯度似乎提供了足够的二次谐波阻尼强度的增强，以解释所观察到的差异。然而，需要对质子浓度进行可靠的测量，以便在两种可能性之间进行选择。在最近的实验中，在ATC设备的离子加热进行了详细研究。结果表明，ICRF加热可以加热托卡马克等离子体核心中的大部分离子，效率范围从10%到40%，而不会引起离子能量约束的任何显着变化。«少
The current status of ICRF heating of Tokamak plasmas is described. Two aspects of the subject are discussed: the physics of wave damping and the evaluation of ion heating. Recent experiments in several Tokamak devices at the second harmonic of the deuteron cyclotron frequency have exhibited large discrepancies between the observed and predicted wave damping. A possible explanation, based upon enhanced cyclotron harmonic damping due to the proximity of the two-ion hybrid and cyclotron resonance layers, is discussed. The boundary value problem for fast wave propagation in an inhomogeneous two-ion plasma has been solved explicitly to obtain the wave field structure. For modest proton concentrations (less than 5 percent) a steep gradient in the left-hand polarized electric field is found in the region between the hybrid and cyclotron resonant layers. This gradient appears to provide sufficient enhancement of the second harmonic damping strength to account for the observed discrepancies. However, a reliable measurement of the proton concentration is needed to choose between the two possibilities. Ion heating was examined in detail in recent experiments in the ATC device. It is shown that ICRF heating can heat the bulk of the ions in the core of a Tokamak plasma with efficienciesmore » ranging from 10 to 40 percent, without causing any significant change in the ion energy confinement.« less