力平衡、波驱动旋转环面中的粒子轨道
Particle Orbits in a Force-Balanced, Wave-Driven, Rotating Torus
AI总结：
本文探讨了波驱动旋转环面（WDRT）聚变装置中实现宏观力平衡的条件，指出需引入少量等离子体电流和垂直磁场，并分析了该理想区域内粒子轨道的各向异性及其对新经典效应的潜在影响。
摘要：
波驱动旋转环面（WDRT）是最近提出的一种聚变概念，其旋转变换由小半径方向电场产生的E x B漂移提供。例如，该电场可通过RF波介导提取聚变产生的alpha粒子来形成。本文讨论了在此类装置中如何实现宏观力平衡，即热箍力的平衡。我们证明这需要引入少量等离子体电流和垂直磁场，并通过自由能考虑确定了理想的反应堆运行区域。随后，我们分析了该理想区域内的粒子轨道，识别出捕获（香蕉）轨道在速度空间中的各向异性，这是由径向电场与极向磁场导致的旋转变换相互抵消所致。最后讨论了这些轨道对垂直电导率、电流驱动和输运可能产生的新经典效应。
英文摘要：
The wave-driven rotating torus (WDRT) is a recently proposed fusion concept where the rotational transform is provided by the E x B drift resulting from a minor radial electric field. This field can be produced, for instance, by the RF-wave-mediated extraction of fusion-born alpha particles. In this paper, we discuss how macroscopic force balance, i.e. balance of the thermal hoop force, can be achieved in such a device. We show that this requires the inclusion of a small plasma current and vertical magnetic field, and identify the desirable reactor regime through free energy considerations. We then analyze particle orbits in this desirable regime, identifying velocity-space anisotropies in trapped (banana) orbits, resulting from the cancellation of rotational transforms due to the radial electric and poloidal magnetic fields. The potential neoclassical effects of these orbits on the perpendicular conductivity, current drive, and transport are discussed.
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