EAST低杂波电流驱动的数值模拟及分析

核聚变与等离子体物理 ›› 2011, Vol. 31 ›› Issue (4): 289-296.

• 等离子体物理学 • 下一篇

EAST低杂波电流驱动的数值模拟及分析

李妙辉，丁伯江，孔二华，张磊，单家方，刘甫坤，王茂，徐旵东

(中国科学院等离子体物理研究所，合肥 230031)

收稿日期:2011-02-23 修回日期:2011-05-26 出版日期:2011-12-15 发布日期:2011-12-09
作者简介:李妙辉(1984-)，男，湖南新化县人，博士研究生，主要从事低杂波电流驱动实验和数值模拟研究。
基金资助:
国家自然科学基金资助项目(10875149，10805057)；国家磁约束聚变科学项目(2010GB105004)

Simulation and analysis of lower hybrid current drive on EAST tokamak

LI Miao-hui, DING Bo-jiang, KONG Er-hua, ZHANG Lei, SHAN Jia-fang, LIU Fu-kun, WANG Mao, XU Han-dong

(Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031)

Received:2011-02-23 Revised:2011-05-26 Online:2011-12-15 Published:2011-12-09

摘要/Abstract

摘要：

介绍了波的射线轨迹程序C3PO和求解三维Fokker-Planck方程程序LUKE的基本计算过程及其物理机制。该程序采用的是反弹平均方法，考虑了相对论效应和捕获粒子效应。利用此程序模拟并分析了EAST偏滤器位形下等离子体电流对低杂波传播以及驱动效率的影响。计算结果表明，随着电流的增大，低杂波射线轨迹在极向的旋转加快，功率沉积位置内移，驱动效率变大。此外，还发现当波束在上平面边界反射回来向等离子体中心传播时，平行折射率有较大的上移。考虑快电子的径向扩散后，驱动电流分布变宽。横越边界的损失以及一部分快电子因扩散到碰撞增强的区域而迅速慢化导致驱动效率下降。当扩散系数为1.5m² •s^-1时，驱动电流的模拟值和实验值基本吻合。

关键词: 低杂波电流驱动, 朗道阻尼, 径向扩散, 数值模拟

Abstract:

The calculation processes and consideration on the physical regime of C3PO, a ray-tracing code, and LUKE, a fast numerical solver for the 3-D Fokker-Planck equation, are presented. Bounce average is used and the relativistic and particle-trapped effects are taken into account in the codes. The simulation and analysis of plasma current influence on rays propagation and current drive (CD) efficiency in EAST divertor configuration have been carried out using these codes. The numerical results indicate that, with the increase of plasma current, the rotation of the poloidal rays trajectory becomes faster, the power deposition profile shifts on axis, and the CD efficiency becomes higher. In addition, it is discovered that the trajectory provided high N||-upshift when the ray propagated towards the edge density cut-off at the top of the chamber and then bounced back towards the plasma centre. When the effect of radial diffusion of fast electrons is considered, the shape of driven current becomes broad, but CD efficiency decreases due to the radial loss and collisional loss of electrons moving to the region where collision is serious. While the diffusion coefficient is assumed to be 1.5m²•s^-1, the modeling result of driven current approaches to the experimental value.

Key words: LHCD, Landau damping, Radial diffusion, Numerical simulation

中图分类号:

O532+.23

李妙辉，丁伯江，孔二华，张磊，单家方，刘甫坤，王茂，徐旵东. EAST低杂波电流驱动的数值模拟及分析[J]. 核聚变与等离子体物理, 2011, 31(4): 289-296.

LI Miao-hui, DING Bo-jiang, KONG Er-hua, ZHANG Lei, SHAN Jia-fang, LIU Fu-kun, WANG Mao, XU Chan-dong. Simulation and analysis of lower hybrid current drive on EAST tokamak[J]. NUCLEAR FUSION AND PLASMA PHYSICS, 2011, 31(4): 289-296.

参考文献

[1] Litaudon X, B´ecoulet A, Crisanti F. Progress towards steady-state operation and real-time control of internal transport barriers in JET [J]. Nucl. Fusion, 2003, 43: 565.

[2] Söldner F X, McCormick K, Eckhartt D. Suppression of sawtooth oscillations by lower-hybrid current drive in the ASDEX tokamak [J]. Phys. Rev. Lett., 1986, 57: 1137.

[3] Hoang G T, B´ecoulet A, Jacquinot J. A lower hybrid current drive system for ITER [J]. Nucl. Fusion, 2009, 49: 075001.

[4] Ekedahl A, Delpech L, Goniche M. Validation of the ITER-relevant passive-active-multijunction LHCD laun- cher on long pulses in Tore Supra [J]. Nucl. Fusion, 2010, 50: 112002.

[5] Pericoli-Ridolfini V, Barbato E, Cirant S. High plasma density lower-hybrid current drive in the FTU tokamak [J]. Phys. Rev. Lett., 1999, 82: 93.

[6] Brambilla M. Slow-wave launching at the lower hybrid frequency using a phased waveguide array [J]. Nucl. Fusion, 1976, 16: 47.

[7] Bonoli P T, Englade R C. Simulation model for lower hybrid current drive [J]. Phys. Fluids, 1986, 29: 2937.

[8] Stix T H. The theory of plasma waves [M]. New York: McGraw Hill, 1962. 85.

[9] Ekedahl A, Baranov Yu F, Dobbing J A. Profile control experiments in JET using off-axis lower hybrid current drive [J]. Nucl. Fusion, 1998, 38: 1397.

[10] Barbato E, Pericoli-Ridolfini V. Internal transport barrier studies in the FTU fusion [J]. Sci. Techn., 2004, 45: 323.

[11] Peysson Y, the Tore Supra Team. Progress towards high-power lower hybrid current drive in TORE SUPRA [J]. Plasma Phys. Contr. Fusion, 2000, 42: B87.

[12] Takase H, Okano K, Hatayama A. Physical mechanism for the temperature dependence of lower hybrid current drive efficiency [J]. Plasma Phys. Contr. Fusion, 1991, 33: 749.

[13] Barbato E, Romanelli F. Broadening of the lower hybrid k_|| spectrum by toroidal effects [J]. Phys. Fluids B, 1990, 2: 2687.

[14] Imbeaux F, Peysson Y. Ray-tracing and Fokker-Planck modelling of the effect of plasma current on the propagation and absorption of lower hybrid waves [J]. Plasma Phys. Contr., Fusion, 2005, 47: 2041.

[15] Fisch N J. Theory of current drive in plasmas [J]. Rev. Mod. Phys. 1987, 59: 175.

[16] Brambilla M. Kinetic theory of plasma waves [M]. Oxford: Oxford Science Publications, 1998.

[17] Fisch N J. Conductivity of RF-heated plasma [J]. Phys. Fluids, 1985, 28(1): 245.

[18] Bartiromo R. Transport properties of current driven tokamak plasmas [J]. Plasma Phys. Contr. Fusion, 1993, 35: A167.

[19] Kwon O J, Diamond P H. A study of runaway electron confinement in the ASDEX tokamak [J]. Nucl. Fusion, 1988, 28: 1931.

[20] Peysson Y. Transport of fast electrons during LHCD in TS, JET, and ASDEX [J]. Plasma Phys. Contr. Fusion, 1993, 35: B253.

[21] Baranov Y, Brusati M, Ekedahl A, et al. Modelling of LHCD and comparison with experimental results in JET [A]. Proc. of the 20^th EPS Conf. on Contr. Fusion and Plasma Physics [C]. Geneva: European Physical Society, 1993.

[22] 丁伯江, 匡光力. 低杂波电流驱动的数值模拟 [J]. 物理学报, 2002, 51(11): 2556.

EAST低杂波电流驱动的数值模拟及分析

Simulation and analysis of lower hybrid current drive on EAST tokamak

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