During ion cyclotron resonance heating, the sheath power dissipation caused by ion acceleration in the radio frequency (RF) sheath is one of the main causes of RF power loss in the tokamak edge region. To estimate the power dissipation of an RF sheath in the ion cyclotron range of frequency (ICRF), a 1D fluid model for the multi-component plasma sheath driven by a sinusoidal disturbance current in the ICRF is presented. By investigation of the sheath potential and ion flux at the wall, it is shown that the larger frequency and lower amplitude of the disturbance current can cause smaller sheath power dissipation. The effect of the energetic ion on the sheath power dissipation depends on the disturbance current. For large amplitude of disturbance current, the increase in the concentration and energy of the energetic ion leads to a decrease in sheath power dissipation. While for a small disturbance current, the sheath power dissipation demonstrates non-monotonic variation with the ...

中文翻译：

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离子回旋共振加热引起的护套功耗估算

在离子回旋共振加热期间，由射频（RF）护套中的离子加速引起的护套功率耗散是在托卡马克边缘区域中RF功率损耗的主要原因之一。为了估计射频鞘管在离子回旋频率范围（ICRF）的功耗，提出了由ICRF中正弦扰动电流驱动的多组分等离子体鞘管的一维流体模型。通过研究壁上的鞘层电势和离子通量，可以看出，较大的频率和较低的干扰电流幅度可以导致较小的鞘层功耗。高能离子对护套功率耗散的影响取决于干扰电流。对于较大的干扰电流，高能离子的浓度和能量的增加导致护套功率耗散的降低。对于较小的干扰电流，护套功率损耗表现出非单调变化，随...