电子回旋波抑制托卡马克装置撕裂模不稳定性的理论研究

In tokamak devices, the tearing mode instability is often responsible for degraded plasmas confinement and is considered as a potential threat for the successful operation of burning plasmas experiments. It is well known that the electron cyclotron wave can be transmitted to the center region of plasma that with high temperature and high-density, diving a local plasma current and heating the plasmas. In this project, we will carry out theoretical and numerical studies of tearing mode instability in the Tokamak devices with electron cyclotron wave injection. Based on the basic principle of plasmas and electron cyclotron wave, together with the magnetohydrodynamic equations, we will propose a theoretical model where the effect of electron cyclotron wave on the tearing mode in tokamka is considered, in which the the profile of the current driven by the electron cyclotron wave and the related power deposition are obtained. On the consequence, an effective method of suppressing the tearing modes with electron cyclotron wave injection will be obtained. This project is of great significance to the tokamak experiments with high performance and steady state operation in the future.

托卡马克等离子体中的撕裂模不稳定性严重限制了等离子体的运行参数，甚至导致等离子体放电破裂，是制约托卡马克装置稳态、高性能运行的重要原因之一。电子回旋波能传播到高温、高密度的等离子体中心加热等离子体和驱动等离子体电流，并且驱动的电流和沉积的功率具有非常好的定域性，本课题将利用电子回旋波的这一特性，将其注入到等离子体撕裂模磁岛中，对其抑制撕裂模不稳定性作用开展理论研究。根据电子回旋波与等离子体相互作用的原理、磁流体力学基本理论，建立起相关的物理模型，研究电子回旋波在磁岛内驱动的等离子体电流和波功率的沉积，研究撕裂模磁岛的非线性演化过程和电子回旋波对撕裂模的抑制作用，获得如何用电子回旋波抑制撕裂模不稳定性，及决定制稳作用的主要物理因素，开展这一课题的研究对实现托卡马克等离子体高性能稳态运行具有极其重要的意义。