| 等离子体压强对Line-tied扭曲不稳定性增长率和本征函数的影响 |
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| 引用本文： | 代玉杰,刘金远,王学慧. 等离子体压强对Line-tied扭曲不稳定性增长率和本征函数的影响[J]. 核聚变与等离子体物理, 2010, 30(4): 306-311 |
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| 作者姓名： | 代玉杰 刘金远 王学慧 |
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| 作者单位： | 辽宁石油化工大学理学院,抚顺,113001;大连理工大学物理与光电工程学院高科技研究院,大连,116024 |
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| 基金项目： | 国家自然科学面上基金(10875024);科技部ITER计划专项国内配套研究2009年度项目(2009GB105004);辽宁省高等学校科研项目计划(2008S059) |
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| 摘 要： | 应用半解析方法,研究了直圆柱位形下等离子体压强P0分别为P0=0、P0=常数和P0=f(r)时Line-tied扭曲不稳定性的增长率和二维径向本征函数的演化规律。结果表明,P0=0和P0=常数时的轴向波数k的范围相同,但P0=常数时的增长率比P0=0时的小。P0=f(r)时的轴向波数k的范围和增长率则都比P0=0时的大,同时磁流体的速度变化也较大。因此,P0=f(r)更接近实际的物理模型(例如日冕的喷射问题)。
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| 关 键 词： | 等离子体压强 磁流体 扭曲不稳定性 |
| 收稿时间： | 2010-06-23 |
Effect of the plasma pressure on growth rate and eigenfunction of line-tied kink instability |
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| DAI Yu-jie,LIU Jin-yuan,WANG Xue-hui. Effect of the plasma pressure on growth rate and eigenfunction of line-tied kink instability[J]. Nuclear Fusion and Plasma Physics, 2010, 30(4): 306-311 |
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| Authors: | DAI Yu-jie LIU Jin-yuan WANG Xue-hui |
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| Affiliation: | (1. College of Sciences, Liaoning Shihua University, Fushun 113001; 2. School of Physics and Optoelectronic Technology,College of Advanced Science and Technology, Dalian University of Technology, Dalian 116024) |
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| Abstract: | The evolution of growth rate and two-dimensional radial eigenfunction of line-tied kink instability in cylindrical geometry is studied by using semi-analytical method for the three cases of p0=0,p0=const and p0=f(r) respectively. The ranges of axial wave number k are same for the two cases of p0=0 and p0=const, and the growth rate of p0= const is less than that of p0=0. The ranges of axial wave number k and growth rate of p0=f(r) are greater than that of p0=0, and the magneto- hydrodynamic (MHD) velocity has a great change. Therefore, the case of p0=f(r) is closed to the actual physical model (for example, the coronal mass ejections). |
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| Keywords: | Plasma pressure MHD Kink instability |
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