Rotation and Transport of Torus Plasma with External Momentum Sources

本研究的目的是阐明具有外动量源的环形等离子体中等离子体旋转的机制及其与等离子体输运的关系。本文的研究重点包括：1)场反构型等离子体的旋转机理；2)螺旋系统等离子体中的束流驱动电流；3)平行电流和等离子体旋转的新古典公式（等离子体流或径向电场）；4)存在快速离子损失时径向电场的测定。两年来取得的主要成果有：(1)得到了等离子体在场反转态下的旋转方程，阐明了旋转与等离子体输运的关系。(2)新古典电流和等离子体旋转已被表述为三维几何。(3)束流驱动电流和电导率在托卡马克和螺旋系统之间的表达式相同，而自举电流和等离子体旋转对磁场构型有很强的依赖性。(4)将决定旋转电场或径向电场的方程推广到包含高能粒子损失、电荷交换损失和外部动量源的情况。(5)制订了ICRF少数加热的蒙特卡勒规范。为了根据这里导出的旋转方程确定存在快速离子损失时的径向电场，使用这个蒙特卡罗代码来确定快速离子损失通量。本研究中包含的旋转方程目前正在发展，以包括具有大极向马赫数的情况，以讨论螺旋系统中h模式的可能性。

The purpose of this research was to clarify the mechanism of plasma rotation and it's relation with plasma transport in toroidal plasmas with external momentum sources. The research has been carried out emphasizing the subjects : 1) rotation mechanism of a plasma in a field reversed configuration, 2) beam driven current in a plasma of helical systems, 3) neoclassical formulation for parallel currents and plasma rotation (plasma flow, or radial electric field), 4) determination of radial electric field in the presence of fast ion losses.The main results obtained for these two years are as follows :(1) The rotation equation for a plasma in a field reversed configuration has been obtained and the relation between the rotation and the plasma transport has been clarified.(2) Neoclassical currents and the plasma rotation have been formulated for 3 dimensional geometry.(3) Expressions for beam driven current and electric conductivity are the same between tokamaks and helical systems, while the bootstrap current and plasma rotation have strong dependences on the magnetic field configurations.(4) The equation which determines the rotation or radial electric field has been extended to the case including high energy particle losses, charge exchange losses, and external momentum soarces.(5) A Monte Carle code for ICRF minority heating has been developed. To determine the radial electric field in the presence of fast ion losses based on the rotation equation derived here, this Monte Carlo code was used to determine the fast ion loss fluxes.The rotation equation contained in this research is now being developed to include the case with large poloidal Mach number to discuss the possibility of H-mode in helical systems.