Production, Dynamic Behavior and Measurement of Small Aerosol Particles

在进一步推进气溶胶研究的各个项目上进行了全面的联合研究，主要议题概括如下：1。细粒子的产生至于气态成核过程的理论研究，仍有一些基本问题没有解决，如气体分子的粘附概率，以及实验技术的改进。生产粒度均匀的细颗粒是细颗粒工业应用的基本要求之一，第2）和第3）项中开发的组合技术将是进一步研究的有用方法.粒子动力学利用四极池成功地将单个粒子悬浮在池中，这一技术有望在气溶胶的基础实验研究，如粒子的尺寸、物理和物理化学表征以及动力学研究中发挥重要作用。将需要进一步的技术措施， ...更多信息 适用于更宽的颗粒尺寸范围。在激光照射下，观察到吸光粒子的一些特殊行为。粒子加热和被加热粒子的动力学被认为是解释这些现象的特别重要的.对光散射技术在气溶胶粒子测量中的应用进行了全面的研究。角散射测量结合开尔文池动态光散射（光子相关光谱，PCS）被证实是最有用的细颗粒的原位测量。PCS中使用的数据反演技术仍需进一步改进。111.研究了用粒子感生X射线发射（PIXE）方法对宇治、大坂和维也纳地区的空气悬浮颗粒物样品进行元素分析，目前正在研究当地的特点。将继续就这一项目开展进一步的联合工作。在这项联合工作中讨论的另一个重要议题是大气气溶胶对全球气候的贡献，目前正在考虑一项持续的联合研究计划。少

Comprehensive studies were carried out jointly on various items involved in further advancement of aerosol research, and the main topics are summarized as follows ;1. Production of fine particlesAs for the theoretical study of nucleation processes from gaseous matter, there still remain essential unsolved problems such as the sticking probability of gas molecules, as well as the improvement in experimental techniques. Production of homogeneous sized fine particles is one of the essential requirement for industrial use of fine particles, and the combined techniques developed in items 2) and 3) will be useful method for further research.2. Dynamics of particlesA quadrupole cell was successfully utilized for levitating a single particle in a cell, and this technique is expected to be extremely useful for basic experimental research of aerosols such as sizing, physical and physico-chemical characterization and dynamics study of particles. Further technical ements will be needed to extend i … More ts applicability to more wider size range of particles. Some peculiar behaviors were observed for light-absorbing particles under the irradiation of laser beam. Particle heating and dynamics of heated particles are thought of special importance to elucidate these phenomena.3. Measurement of particlesApplication of light scattering techniques to sizing of aerosol particles was studied comprehensively. Angular scattering measurement in combination with Kelvin cell dynamic light scattering (photon correlation spectroscopy, PCS) were confirmed to be most useful for in-situ measurement of fine particles. Further improvement is still required for data inversion technique used in PCS.4. Atmospheric aerosolsParticle induced X-ray Emission (PIXE) method was studied applied to elemental analysis of airborne particulates sampled at the areas of Uji, Osaka and Vienna, and the local features are now being examined. Further joint works will be continued with this item. Another important topic discussed during this joint work was the contribution of atmospheric aerosols to the global climate, and a continuing joint research program is now under consideration. Less