DEVELOPMENT OF HIGH QUALITY MOLECULAR BEAM BEND ACTIVE CONTROL OF INTERFACIAL PHYSICAL CHEMICAL PHENOMENA

界面物理化学现象的高质量分子束弯曲主动控制的开发

基本信息

批准号：
10555056
负责人：
60111473
金额：
$ 8.51万
依托单位：
THE UNIVERSITY OF TOKYO
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 1999
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10555056/
关键词：
High Quality Molecular Beam Supersonic Free Jet Rarefied Gas Flow Solid Interface Active Control Molecular Dynamics Simulation Internal Degree of Freedom Laser

项目摘要

The following topics were mainly emphasized for the development of a high quality molecular beam and the active control of interfacial physical chemical phenomena.(1) Analysis of the supersonic free jetA flat plate was inserted into the supersonic free jet and numerical simulations and vacuum experiments were carried out to understand the interfacial physical chemical phenomena at the plate-gas boundary. First, using our rarefied gas now numerical predictor, the rotational state of the gas molecules inside the free jet was estimated. Next, vacuum experiments using the electron beam fluorescence (EBF) technique was performed by changing the plate's relative position, initial gas pressure, initial gas temperature. Experiments were done to investigate the rotational effect on the interfacial phenomena.(2) Design and development of a high quality molecular beamBased on the knowledge obtained from (1), flow velocity, translational temperature and rotational temperature of a molecular beam using a skimmer, collimator, and an aperture was estimated. Thus, the molecular beam was optimized by changing the skimmer diameter, shape and material. Also, the nozzle was combined with a one-dimensional traverse unit to extract an optional region of the free jet. Furthermore, the vacuum system and mass filter were revised, and a pulsed nozzle was adopted. Such change has given us high quality data. The test gas molecules were Ar and He, the test surfaces were graphite and copper, to obtain data on the relation between molecular size and it's three-dimensional scattering data.

主要强调了以下主题，以开发高质量的分子束和界面物理化学现象的主动控制。（1）将超音速射流式固定板的分析插入到无频率的射流中，并进行了数值模拟和真空实验，以理解界面物理化学现象在板块板层的边界处。首先，使用我们现在的稀疏气体预测指标，估计了自由喷气机内气体分子的旋转状态。接下来，使用电子束荧光（EBF）技术进行真空实验是通过更改板的相对位置，初始气压，初始气温进行的。进行了实验以研究对界面现象的旋转效应。（2）使用脱毛机，熟悉器和光圈估算了从（1），流速，平移温度和分子束的旋转温度的知识，流速，翻译温度和旋转温度的知识的设计和开发。因此，通过更改脱脂机直径，形状和材料来优化分子束。同样，将喷嘴与一维横板单元组合在一起，以提取自由射流的可选区域。此外，修改了真空系统和质量过滤器，并采用了脉冲喷嘴。这种变化为我们提供了高质量的数据。测试气体分子为AR，HE，测试表面是石墨和铜，以获取有关分子大小与三维散射数据之间关系的数据。