A co2 laser with the optimized resonator is made and to be proved by experiments . this dissertation focus on the following problems : the kinetics process of the cvl and the co2 laser , the rate equations for the laser level population , electron temperature and electron density 本文的重点是:阐述清楚铜蒸汽激光和二氧化碳激光的动力学过程,定量描述激光能级的粒子数速率方程、电子温度和电子密度等速率方程
To analysis the principle of degradation and destruction , a reasonable relationship between the electrostatic potential and 1 - v characteristic parameters is raised ; a computation model for electron trap effect is originally proposed , which leads to a conception of critical trap electron density 本文首次建立了晶界势垒高度与伏安特性参数之间的关系,提出了陷阱效应在冲击老化过程的作用模型,引入了“临界陷阱电荷密度”的概念。
The laser beam spot evolution and electron density in the guiding range are evaluated with the burn pattern and the measured conductivity . the above results will be useful in ultrashort laser pulse amplification and future research in ultrashort intense laser propagation in plasmas and ionizing gases 以上研究结果对于超短脉冲激光放大技术研究以及超短超强脉冲激光在低密度等离子体和空气中长距离传输和聚焦研究等具有重要的实用参考价值。
Abstract : this paper describes the thermal effects of a coaxial rf - excitedco2 laser , based on the balance equations of electron density and energy , current continuity equation , and heat conduction equation . depende ncies of the spatial distributions of gas temperature on some discharge parameters arediscussed 文摘:通过求解放电等离子体中的带电粒子密度和能量的平衡方程、电流连续性方程以及热传导方程,研究了同轴射频( rf )激励co2激光器中放电混合气体的温度效应,分析了有关放电参数对温度分布的影响。
Secretic granules in b cell are fairly big , cores are various . there is fairly big gap between the core and the limiting membrane ; the center of secretic granules in a cell exist compact core and there is no gap between the core and the limiting membrane ; secretic granules in d cell are too much , electron density of granules is lower , and there is no gap between the core and the limiting membrane , what ' s more , fairly big chondriosome can be seen in the cell B细胞的分泌颗王晓丽尼罗罗非鱼胰岛显微和亚显微结构的研究13粒较大,芯的形态多样,电子密度差异大,芯与界膜之间常有较大的空隙; a细胞分泌颗粒形态不规则,芯的大小不等,界膜与芯之间无空隙; d细胞分泌颗粒较多,芯的电子密度较低,界膜与芯之间无空隙,此外,胞质内可见较大的线粒体。