EAST托卡马克H模非局域热输运的物理机制研究

项目名称： EAST托卡马克H模非局域热输运的物理机制研究

项目编号： No.11305208

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 数理科学和化学

项目作者： 张寿彪

作者单位： 中国科学院合肥物质科学研究院

项目金额： 26万元

中文摘要： 国内外几个装置已经在低约束模放电中使用弹丸注入、超声分子束注入、电子回旋加热等研究方法发现了非局域热输运现象，但其物理机制仍需进一步的研究，此外高约束模放电中的非局域热输运研究基本处于空白。2012的EAST实验中，实验观测到了由大幅度的边界局域模触发的非局域热输运的现象，单次的边界局域模可以改变台基区的等离子体密度、等离子体温度、自举电流份额以及湍流的结构，但是究竟是哪个物理量的改变触发了非局域热输运的产生，其机制仍然需要进行深入的研究。此外，通过超声分子束注入等触发手段，可以对低约束模放电和高约束模放电过程中的非局域输运现象进行对比研究，深入理解非局域热输运的物理。EAST装置已经具备了电子回旋辐射系统、微波反射计系统、汤姆逊散射系统等多种诊断工具，能够基本满足测量的需要。在实验上对非局域热输运物理机制进行深入的研究，理解非局域热输运现象的物理过程，进而完善输运理论，这对于如何减小输运以保证EAST稳态长脉冲运行以及未来ITER的运行具有重要的物理意义。

中文关键词： 微波反射计；粒子输运；非局域输运；；

英文摘要： The nonlocal transport phenomenon has been observed and researched in many fusion devices during L-mode, such as TEXT, Tore-Supra, LHD and HL-2A. Impurity injection, SMBI, pellet injection are the main methods to achieved the nonlocal transport; it always occurred at high temperature plasma with low density, which got a density threshold; the core electron temperature responses were of the same polarity as the changes in edge electron temperature. But it is rarely during H mode discharge, and the physical mechanism of nonlocal transport is still not quite clearly. In 2012 EAST campaign, we observed the non-local thermal transport phenomenon during H mode, it is triggred by large ELM event. The ELM can changed the plasma density profile, temperature profile,bootstrap current and turbulence structure, which physical parameter can trigger non-local thermal transport, it need more experimetal analysis. Furthermore, the supersonic molecular beam injection (SMBI) has been developed on EAST, it can trigger the non-local thermal transport. The multi-channels ECE heterodyne radiometer，V&W band microwave reflectometry and a lot of routine diagnostic system can provide the data of electron temperature and density profile and fluctuations.Through the analysis of data, I hope get the reason of non-local thermal transport, it

英文关键词： microwave reflectometry；particle transport；nonlocal transport；；