低杂波电流驱动与径向电场相关性的数值模拟

核聚变与等离子体物理 ›› 2009, Vol. 29 ›› Issue (4): 309-314.

低杂波电流驱动与径向电场相关性的数值模拟

韦维，丁伯江，张霆，罗乐

（1. 合肥工业大学物理系，合肥 230009；2. 中国科学院等离子体物理研究所，合肥 230031)

收稿日期:2008-12-08 修回日期:2009-06-03 出版日期:2009-12-15 发布日期:2010-05-24
作者简介:韦维(1979-)，女，壮族，广西宜州人，讲师，硕士，从事等离子体物理及微波技术等方面的研究。
基金资助:
中国自然科学基金资助项目(10575104)

Simulation of lower hybrid wave coupling power spectrum with poloidal effects

WEI Wei, DING Bo-jiang, ZHANG Ting, LUO Le

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

Received:2008-12-08 Revised:2009-06-03 Online:2009-12-15 Published:2010-05-24

摘要/Abstract

摘要： HT-7上用于低杂波电流驱动的相控波导阵天线采用的是标准波导，长和宽都是有限值。在考虑了天线上下排波导之间可能存在的极向相位差以及电磁干扰时，通过数值模拟的方法，分别得到了低杂波在环向方向的平行功率谱和在极向方向的极向功率谱。由于极向波矢的存在，低杂波进入等离子体的入射方向会发生改变。最后在不同极向相位差下对低杂波进入等离子体的入射方向进行了简要的计算和讨论。

关键词: 数值模拟, 波耦合, 极向波矢

Abstract: The coupler of LHCD on HT-7 tokamak is constituted with standard wavegudes, whose length and width are constant. Considering of the possible poloidal phase difference between the up and down guides and electromagnetic interference, we get the power spectrum lower hybrid wave in both poloidal and toroidal direction by the way of simulation. Due to the poloidal wave vector, the incident direction of lower hybrid wave launching into plasma will be changed. In the last, the incident angle of lower hybrid wave launching into plasma is simply estimated and discussed under the different poloidal phases.

Key words: Lower hybrid current drive, Radial electric field, Improved confinement

中图分类号:

O532^+.23

韦维，丁伯江，张霆，罗乐. 低杂波电流驱动与径向电场相关性的数值模拟[J]. 核聚变与等离子体物理, 2009, 29(4): 309-314.

WEI Wei, DING Bo-jiang, ZHANG Ting, LUO Le. Simulation of lower hybrid wave coupling power spectrum with poloidal effects[J]. NUCLEAR FUSION AND PLASMA PHYSICS, 2009, 29(4): 309-314.

参考文献

[1] Shaing K C, Hsu C T, Christenson P J, et al. L-H transition in tokamaks and stellarators [J]. Plasma Phys. Contr. Fusion, 1994, 36: A75.

[2] Iton S I, Iton K, Toda S, et al. Statistical theory of LH transition in tokamaks [J]. Plasma Phys. Contr. Fusion, 2003, 45: 823.

[3] Moyer R A, Burrell K H, Carlstrom T N, et al. Beyond paradigm: turbulence, transport, and the origin of the radial electric field in low to high confinement mode transitions in the DIII-D tokamak [J]. Phys. Plasma, 1995, 2: 2397.

[4] Ida K, Iton S I, Iton K, et al. Density peaking in the JFT-2M tokamak plasma with counter neutral-beam injection [J]. Phys. Rev. Lett., 1992, 68: 182.

[5] Boedo J A, Terry P W, Gray D, et al. Suppression of temperature fluctuations and energy barrier generation by velocity shear [J]. Phys. Rev. Lett., 2000, 84: 2630.

[6] Field A R, Fussmann G, Hofmann J V, et al. Measurement of the radial electric field in the ASDEX tokamak [J]. Nucl. Fusion, 1992, 32: 1191.

[7] Burrell K H. Effects of E×B velocity shear and magnetic shear on turbulence and transport in magnetic confinement devices [J]. Phys. Plasma, 1997, 4: 1499.

[8] Biglari H, Diamond P H, Terry P W. Influence of sheared poloidal rotation on edge turbulence [J]. Phys. Fluids B, 1990, 2: 1.

[9] Shaing K C, Crume E C. Bifurcation theory of poloidal rotation in tokamaks: a model for L-H transition [J]. Phys. Rev. Lett., 1989, 63: 2369.

[10] Itoh S I, Itoh K. Model of L to H-mode transition in tokamak [J]. Phys. Rev. Lett., 1988, 60: 2276.

[11] Van Oost G, Adámek J, Antoni V, et al. Turbulent transport reduction by E×B velocity shear during edge plasma biasing: recent experimental results [J]. Plasma Phys. Contr. Fusion, 2003, 45: 621.

[12] Angelini B, Annibaldi S V, Apicella M L, et al. Overview of the FTU results [J]. Nucl. Fusion, 2005, 45: S227.

[13] Ushigusa K, Akaoka N, Akasaka H, et al. Recent results of LH experiments on the JT-60 tokamak [J]. Plasma Phys. Contr. Fusion, 1990, 32: 853.

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

[15] Chen Z Y ,Wan B N, Lin S Y, et al. Dynamics of runaway electrons in lower hybrid current drive plasmas in the HT-7 tokamak [J]. Plasma Phys. Contr. Fusion, 2006, 48: 1489.

[16] Wei W, Kuang G L, Ding B J, et al. LHCD properties with a new lower hybrid wave antenna on HT-7 tokamak [J]. Plasma Sci. Tech., 2005, 7: 3005.

[17] Ding B J, Shan J F, Liu F K, et al. Experimental characteristics of a lower hybrid wave multi-junction coupler in the HT-7 tokamak [J]. Chin. Phys., 2006, 15: 2989.

[18] Gao X, Xu Q, Li J G, et al. Study of confinement and LHCD efficiency on the HT-7 tokamak [J]. Plasma Phys. Contr. Fusion, 2008, 50: 035006.

[19] Wobig H. On rotation of multi-species plasmas in toroidal systems [J]. Plasma Phys. Contr. Fusion, 1996, 38: 1053.

[20] 朱士尧. 核聚变原理 [M]. 合肥: 中国科学技术大学出版社, 1992. 63.

[21] 丁伯江. 低杂波电流驱动(LHCD)的实验和数值模拟研究 [D]. 合肥: 中科院等离子体物理研究所, 2001.