作　　者： ; ; ; ; ; ; ;

机构地区： 四川大学物理科学与技术学院原子与分子物理研究所

出　　处： 《强激光与粒子束》 2007年第4期607-610,共4页

摘　　要： 采用瑞利散射法和Mach-Zehnder（M-Z）干涉法分别测量氩、氪团簇的尺寸和密度,讨论了影响团簇尺寸和密度的因素,并比较氩团簇和氪团簇特性的异同点。通过改变诊断光和喷嘴阀门的相对延迟时间,获得了团簇尺寸和密度随时间的变化情况,发现氩、氪团簇的尺寸和密度均在3-25ms达到最大值;在气体背景压强1.2-6.0MPa下,测量了喷嘴轴线上的密度分布,发现离喷嘴喉部越远,气体密度越低,并且气体密度随压强呈线性上升。 The Rayleigh scattering and Mach-Zehnder interferometry are employed to investigate the properties of argon and krypton clusters respectively. By comparing the size and density of the two kinds of clusters in detail, the factors of cluster formation are discussed. Varying the delay time between probe laser and nozzle valve, the temporal evolution of size and density is obtained, the density spatial distribution along nozzle axis with the background pressure from 1.2 MPa to 6.0 MPa is measured. Both size and density of the argon and krypton clusters reach max and the system is stable from 3 ms to 25 ms. In addition, the density increases linearly with background pressure, and decreases with the distance away from the nozzle throat.

关 键 词： 团簇 瑞利散射 干涉 时间演变 密度空间分布

领　　域： [一般工业技术]