| 尘埃等离子体微波衰减常数的理论分析 |
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| 引用本文： | 石雁祥,葛德彪,吴健.尘埃等离子体微波衰减常数的理论分析[J].地球物理学报,2007,50(4):1005-1010. |
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| 作者姓名： | 石雁祥 葛德彪 吴健 |
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| 作者单位： | 1 西安电子科技大学理学院应用物理系,西安 710071 2 中国电波传播研究所,电波环境特性与模化技术国家重点实验室,北京 102206 |
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| 基金项目： | 电波环境特性与模化技术国家重点实验室基金项目(51486040205DZ0101,9140C080501060C08)，国家自然科学基金重大国际合作项目(40310223)资助. |
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| 摘 要： | 将固体火箭喷焰看作弱电离尘埃等离子体，在统计理论框架下，通过求解含碰撞项的Blotzmann方程和Shukla方程，给出了弱电离尘埃等离子体复电导率和衰减常数计算公式，提出了充电响应因子的概念.将固体火箭喷焰的有关参数代入计算表明，衰减常数同时受电子和尘埃粒子浓度以及尘埃粒子半径的影响.理论的分析与实验所观测到的现象一致.
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| 关 键 词： | 弱电离尘埃等离子体 充电方程 电导率 衰减常数 |
| 文章编号： | 0001-5733（2007）04-1005-06 |
| 收稿时间： | 2006-10-26 |
| 修稿时间： | 2006-10-26 |
Theoretical analysis of microwave attenuation constant of weakly ionized dusty plasma |
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| SHI Yan-Xiang,GE De-Biao,WU Jian.Theoretical analysis of microwave attenuation constant of weakly ionized dusty plasma[J].Chinese Journal of Geophysics,2007,50(4):1005-1010. |
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| Authors: | SHI Yan-Xiang GE De-Biao WU Jian |
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| Institution: | 1 Department of Physics, Xidian University, Xian 710071, China2 China Research Institute of Radiowave Propagation, National Key Laboratory of Electromagnetic Environment, Beijing 102206, China |
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| Abstract: | The complex conductivity and attenuation constant are deduced for the weakly ionized dusty plasma by solving the Boltzmann and Shukla equations given by statistical theory. And the concept of response factor of charging is proposed. Our theoretical result is applied to calculate the microwave attenuation constant of a solid rocket plume which is taken to be a weakly ionized dusty plasma. It is shown that the attenuation constant is affected by the densities of both electrons and dust grains as well as the radius of grains, in a general agreement with the phenomenon observed in laboratory. |
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| Keywords: | Weakly ionized dusty plasma Charging equation Conductivity Attenuation constant |
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