Elementary Process in the Fine Particle Plasmas and its Generation

船法能够产生细小的颗粒，其颗粒大小可以通过船的温度和气体流量来控制，并且有足够的精度。在紫外光的持续照射下，产生了细小的等离子体。对该等离子体进行了如下实验：(1)与带电球体的相互作用：小剪切力悬挂在细粒子等离子体中，球体的电势突然反转。粒子的吸引运动和排斥运动表明粒子处于等离子体状态。(2)与气态等离子体混合，通过辉光放电与气态等离子体中的细粒子等离子体混合。带负电的球体强烈地吸引了细小颗粒。这一事实表明，浸没在气体等离子体中的细粒子带负电荷。(3)库仑晶格。细粒子在带电500V的细线周围形成树状晶格。这一事实表明，细粒子等离子体处于强耦合状态。(4)电场偏转。在100V/cm的静电场中引入细粒子束。粒子束通过电场后分成两束。密度测量：通过对入射的He-Ne激光光强的衰减，精确地得到了细颗粒的平均密度。由散射激光光强分布观察到空间密度分布。这些方法对于观察细粒子等离子体中的物理过程是非常有用的。(6)磁场偏转。将细粒子束引入4400G的静磁场中，粒子束通过磁场后分离为两束。我们可以通过分析光束的运动来测量粒子的变化。

Fine particles were able to generate by the boat method, and its particle size was able to control by the boat temperature and the argon gas flow with enough precisions. The fine particle plasmas were created by the irradiation of ultraviolet light constantly. Experiment on this plasmas are as follows.(1) Interaction with charged sphere.The small shere was hanged in the fine particle plasmas, and potential of sphere was inverted suddenly. The attracting motion and repulsing motion of particles indicate that particles were in plasma states.(2) Mixing with gaseous plasmas.Mixture with the fine particle plasma of gaseous plasma was performed by the glow discharge. Fine particles were attracted strongly to the negatively charged sphere. This fact indicates that the fine particles immersed in gaseous plasma are charged negatively.(3) Coulomb Lattice.The fine particles generated the tree form lattice around the fine wire charged 500 V.This fact indicates that the fine particle plasmas were in the strongly coupled state.(4) Deflection by Electric Field.Fine particle beam was introduced into the static field of 100 V/cm. Particle beam separated to two beams after pass through the field. We could measure the charge of particle by analysis of beam motions.(5) Density Measurement.The averaged fine particle density was precisely obtained by the attenuation of incident He-Ne laser light intensity. Spatial density distributions were observed by the scattered laser light intensity distributions. These methods are very useful for observing the physical process in the fine particle plasmas.(6) Deflection by Magnetic Field.Fine particle beam was introduced into the static magnetic field of 4400 G.Particle beam separated to two beams after pass through the magnetic field. We could measure the change of particle by analysis of beam motions.