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| 磁场中电弧等离子体柱的螺旋不稳定性 | |
| 引用本文： | 李国炳 刘金远. 磁场中电弧等离子体柱的螺旋不稳定性[J]. 核聚变与等离子体物理, 1995, 15(2): 9-17 |
| 作者姓名： | 李国炳 刘金远 |
| 作者单位： | 大连理工大学 |
| 摘 要： | 讨论了具有抛物互形电流分布的电弧等离子体柱在磁场中的不稳定性问题，从磁流体力学方程组出发，推导出电弧柱扰动满足的方程与边界条件，求得了这些方程的解析解，进而导出了在趋中心电流分布情形下电弧运动所满足的微分方程，由此给出了稳定性判据。将所得结果与均匀电流分布情形做了比较，稳定区域增宽，与实验结果相符。 |
| 关 键 词： | 电弧 等离子体柱 螺旋不稳定性 磁场 |
HELICAL INSTABILITY OF ARC PLASMA COLUMN IN A MAGNETIC FIELD |
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| LI Guobing, LIU Jinyuan, SUN Jizhong, GONG Ye. HELICAL INSTABILITY OF ARC PLASMA COLUMN IN A MAGNETIC FIELD[J]. Nuclear Fusion and Plasma Physics, 1995, 15(2): 9-17 | |
| Authors: | LI Guobing LIU Jinyuan SUN Jizhong GONG Ye |
| Abstract: | The helical instability problem of an arc plasma column with a parabolic current profile in a magnetic field is discussed. From hydromagnetic equations, the perturbation equations and the boundary conditions for arc column movement are deduced. Analytical solutions of the equation are obtained, thereupon the differential equation governing the movement of the arc column with center trending current distribution is formed, from which the instability criterion is obtained. The results are compared with that from the uniform current distributions. |
| Keywords: | Arc plasma column Helical instability Center trending current profile Stability criterion |
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