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ELECTRON AND ION SWARM PROCESS AND ITS APPLICATION INCLUDING INELASTIC EFFECT.

电子和离子群过程及其应用，包括非弹性效应。

基本信息

批准号：
06302033
负责人：
TAKEBE Masahiro
金额：
$ 7.42万
依托单位：
TOHOKU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Co-operative Research (A)
财政年份：
1994
资助国家：
日本
起止时间：
1994 至 1995
项目状态：
已结题

项目摘要

The present co-operative research deals with the inelastic effect on electron-and ion-swarm phenomena, which is one of the most interesting research subjects in recent gas-phase electron-and ion-chemistry as well as many other applied fields. Inelastic proces occurred in the collisions between an electron (or an ion) and a polyatomic molecule will change their translational energies, because the translational energy will partly be absorbed into the internal energy of polyatomic molecule and will make it an internally excited state. Therefore, many swarm parameters which are functions of the translational energy will seriously be affected by the inelastic energy loss process.In order to carry out the present research program more effectively, we haved devided the investigators into three sub-groups.The researchers in the first group have developed electron and ion swarm theory including inelastic process. Based upon Boltzmann analysis, they have elucidated the relation between the solutions of Boltzmann equation and the transport equation including inelastic cross sections.The second group have carried out the experiments on electron and ion swarm to derive directly the information on the inelastic process from the measurement data. Using two drift tubes and a micro-wave apparatus, the members have measured the coefficients of electron attachment, electron/ion recombination, ion mobility, and electron mobility in polyatomic gases.The third group have mainly investigated the applied techniques of electron and ion swarms, related especially to the inelastic effect on photo ionization and weakly ionized plasmas. They have measured the number density of excited neutral molecules in plasma and the relaxation time of electron energy distribution. Also, as two newly developed fields, the separation of isotopes in plasma using laser beam technique and Coulomb lattice in weakly ionized plasma have intensively been investigated.

目前的合作研究涉及电子和离子群现象的非弹性效应，这是近年来气相电子和离子化学以及许多其他应用领域最感兴趣的研究课题之一。电子(或离子)与多原子分子碰撞过程中发生的非弹性过程会改变它们的平动能，因为平动能会被部分吸收到多原子分子的内能中，使其成为内部激发态。因此，许多作为平动能函数的粒子群参数将受到非弹性能量损失过程的严重影响。为了更有效地执行本研究计划，我们将研究人员分为三个子组。第一组研究人员发展了包括非弹性过程在内的电子和离子群理论。在玻尔兹曼分析的基础上，阐明了玻尔兹曼方程的解与包含非弹性截面的输运方程之间的关系。第二组在电子群和离子群上进行了实验，直接从测量数据中获得关于非弹性过程的信息。利用两个漂移管和一个微波装置，成员们测量了多原子气体中的电子附着系数、电子/离子复合系数、离子迁移率和电子迁移率。第三组主要研究了电子和离子群的应用技术，特别是与光致电离和弱电离等离子体的非弹性效应有关的应用技术。他们测量了等离子体中被激发的中性分子的数密度和电子能量分布的驰豫时间。此外，激光分离和弱电离等离子体中的库仑晶格这两个新兴的研究领域也得到了深入的研究。