含有部分填充等離子體柱的螺旋線混合模的理論分析
Study of the hybrid mode in the helix with a partially filled plasma column
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摘要: 導(dǎo)出了含有部分填充等離子體柱的螺旋線中混合模的色散方程,計(jì)算出混合模的色散曲線并由此探討了混合模的形成條件。研究了約束磁場對軸向電場的徑向分布的影響。在低約束磁場下軸向電場的徑向分布顯示場與電子束的耦合顯著增強(qiáng),無聚焦磁場時存在著沿等離子體柱面?zhèn)鞑サ?TG模。
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關(guān)鍵詞:
- 等離子體填充的行波管; 螺旋線; 混合模
Abstract: The dispersion equation of the axial symmetric hybrid mode inside the helix with a partially filled plasma column is derived, its dispersion curves are calculated, and the conditions to form that mode are illustrated. The effect of confining magnetic field on the radial profile of axial electric field is studied. In the situation that the strength of confining magnetic field has been entrusted a practical low value, the calculated radial profile shows much stronger coupling of the filed to the electron beam. In the situation without confining magnetic field, a Trivelpiece-Gould mode propagating along the surface of the plasma column presents. -
G.S. Nusinovich, Y. Camel, T. M. Antonsen, Jr, D. M. Goebel, J. Santoru, Recent progress in the development of plasma-filled traveling-wave tubes and backward-wave oscillators, IEEE Trans. on Plasma Sci., 1998, 26(3), 628-645.[2]S. Kobayashi, T. M. Antonsen, Jr, S. Nusinivich, Linear theory of a plasma loaded, helix type,slow wave amplifier, IEEE Trans. on Plasma Sci., 1998, 26(3), 669-679.[3]A.W. Trivelpiece, Slow Wave Propagation in Plasma Waveguides, San Francisco, San Francisco Press, 1967, 22.[4]陳光,部分填充等離子體的螺旋線電磁特性的理論與實(shí)驗(yàn)研究,北京,[碩士論文],北京大學(xué),2001[5]R.E. Collin, Foundations for Microwave Engineering, New York, McGraw-Hill, 1966, 393.[6]A.W. Trivelpiece, R. W. Gould, Space charge waves in cylindrical plasma columns, JAP, 1959,30(11), 1784-1794. -
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