We then discuss the vibrational - rotational level transitions and the population rate equations for the laser . in addition , electron temperature , electron density and the mixtured gas temperature in the laser plasma are investigated in details . the third part is with regard to the optimal designs and the experiments of the lasers 在二氧化碳激光动力学机理的研究中,比较详细地讨论了二氧化碳激光动力学过程,给出了激光振动-转动能级跃迁及其速率方程、激光等离子体电子密度和电子温度,以及混合气体的气体温度
This technique can measure the profiles of meteorological fields of the neutral atmosphere and the electron densities of the ionosphere with high precision and high vertical resolutions . it can operate all - weather with long - term stabilities and global coverage . the global - distributed occultation data will have a huge promotion on the numerical weather prediction , climate and space weather researches 该技术可测量自地面到约800km高空的中性大气气象场和电离层电子密度剖面,具有全天候、长期稳定、高精度和高垂直分辨率等特点;该技术提供全球分布的资料,将对数值天气预报、气候研究和空间环境研究起极大的推动作用,在气象、空间、天文以及国防领域具有广泛的应用前景。
Numerical simulations were done to show the distortion of the wavefront and the interference pattern under several kinds of typical plasma density distributions . the ray path in plasma was calculated by the numerical solution of the vector equation of light ray , when the plasma density was closing to the critical electron density of the laser frequency . through the simulations , the factors that influence the measurement were found out under different density distributions and shapes of plasma 在此基础上,采用数值模拟的方法,计算了在几种典型的等离子体密度分布下,激光波面的变化和产生的干涉图样;并用光线矢量微分方程的数值解法计算了当等离子体密度接近光频临界电子密度时,光线在等离子体中的传播路径,从中掌握了在不同的等离子体密度和形状下,进行干涉测量所应估计到的因素。
Several influence factors to result plasma drift in hainan were analyzed . in this paper the characteristics of ionospheric parameters variation were analyzed systematically and some new results in storm - time such as seasonal behaviors were obtained ; it is the first time to investigate the ionospheric drift behavior in hainan and some new results was obtained , the relationships between each two plasma drift velocity components in storm time in hainan were found and the electric filed variation in hainan ionosphere also was obtained ; the results also show that there are big differences of the ionosphere parameters bo and bl obtained from the data with that obtained from the iri - 2001 applied for hainan ; a new phenomena was found during a strong magnetic storm , that a layer with very strong electron density and density grad was found during the recovery phase of the storm , its horizontal scale is beyond 100km and temporal scale is about 2 hours , this phenomena repeated 3 times continuously . a type of negative disturbance in high and low latitude but positive disturbance in east - asia also has been found 本文较为系统地给出了海南地区电离层的参数变化特征,特别是得到了一些暴时与以往不同的季节特性;第一次给出了海南地区的电离层等离子体漂移特征,发现等离子体漂移暴时扰动在三个方向上有内在的联系,得到了电场变化曲线;研究结果还表明海南电离层的半厚指数和形状参数等与国际参考电离层iri - 2001存在很大差别;通过对强磁扰动事件期间的参数变化特性分析发现,在磁暴恢复相期间海南地区电离层底部存在一个电子密度非常大的高密度区,高密度区底部电子密度梯度随高度急剧增加,该区域的水平尺度可达100公里以上时间尺度约为2小时,连续出现过三次,这是一个在海南从来未发现的新现象;研究还发现了暴时东亚地区电离层扰动会出现高低纬负相而中纬正相的现象。
Starting from the theory of two photoionization , we simplified the model of the ultraviolet light source , derived the equation for the spatial distributions of the initial electron density between the main electrodes , and then gave a simple method to homegenize the spatial distribution of the initial electron density between the main electrodes 本文从光离化的双光子吸收这一理论出发,简化紫外光源模型后,导出了主电极间初始电子密度的空间分布规律并给出了使其空间分布均匀化的简单方法。