A theoretical investigation of the use of the guiding-centre plasma (GCP) model to describe RF absorption in a non-uniform plasma is made. The absorption is studied in the transit time magnetic pumping (TTMP) and Alfvén wave frequency ranges. An externally applied RF source is assumed with a frequency range lying in the continuous spectra of the linearized GCP equations of motion describing the plasma dynamics. Absorption arises from local resonances which characterize the continuum. The total GCP spectrum is composed of components which are found in ideal MHD and Vlasov kinetic theory. The effective impedance of an external coil assembly is calculated for tokamak and scyllac configurations in both the TTMP and Alfvén wave regimes. Very optimistic results are obtained for both configurations indicating that effective coupling of an external source to the plasma is possible in the Alfvén wave regime. The results also show that better coupling is possible with Alfvén frequencies than with TTMP. The results are compared with similar calculations using only the ideal MHD-model; similarities and deviations are pointed out.
本文对引导中心等离子体（GCP）模型在非均匀等离子体中描述射频吸收的应用进行了理论研究。研究在渡越时间磁泵（TTMP）和阿尔芬波频率范围内进行。假设外部射频源施加的频率范围位于线性化GCP运动方程的连续谱内。吸收源于表征连续谱的局域共振。GCP总谱由理想磁流体动力学（MHD）和弗拉索夫动力学理论中的分量组成。计算了外部线圈组件在托卡马克和串列镜（scyllac）位形下、TTMP和阿尔芬波两种 regime 中的有效阻抗。两种位形均获得了非常乐观的结果，表明在阿尔芬波 regime 下外部源与等离子体的有效耦合是可能的。结果还表明，阿尔芬波频率下的耦合优于TTMP。将结果与仅使用理想MHD模型进行的类似计算进行了比较，并指出了相似之处与差异。