Development of novel refining method for ultra-purified materials

在本研究中，我们试图发展一种基于激光与原子束相互作用的动量控制方法，为各种材料的新型超纯化方法奠定基础。为了达到这个目的，我们制作了实验设备。它包含一个激光源和一个超真空系统。结果，获得10 μ Torr的压力<-11>。然而，该值是我们测量设备的限制，我们认为压力可能低于此。作为激光源，紧凑且廉价的半导体激光器是合适的，并且我们实验所需的功能如下。1.频谱宽度窄至100 kHz，2.更高的稳定性和3.快速频率扫描第一步，半导体激光器的输出由共焦法布里-珀罗干涉仪反馈，以稳定激光频率并减小其宽度。激光频率被广泛地扫描，但由于模式跳变而不平滑。利用光栅实现了平滑、宽范围的扫描，并研究了一种基于光致漂移效应的新型同位素分离方法。在本研究中，在比以往报道的更大的反应池中清楚地观察到光诱导漂移。据认为，一个高效的同位素分离是可能的，通过我们的方法。

In this research, we tried to develop a momentum control method based on the interaction between the laser light and the atomic beam to establish a base of novel ultra-purification method of a wide variety of materials. To achieve this purpose, we made experimental equipment. This contains a laser source and a ultravacuum system. As a result, the pressure of 10^<-11> Torr was obtained. However, this value is the limitation of our measurement equipment and we believe that the pressure may be lower than this.As a laser source, a compact and inexpensive semiconductor laser is suitable and desirable features for our experiments are as follows. 1. a spectral width as narrow as 100 kHz, 2. higher stability and 3. fast frequency scanning. As a first step, the output from the semiconductor laser is feedbacked by confocal Fabry-Perot interferometer to stabilize the laser frequency and to reduce its width. The laser frequency was widely scanned but not smooth due to the mode-hopping. By using a grating, smooth and wide range of scanning was achieved.Moreover, we studied on a novel isotope separation on the basis of a light induced drift effect. In this research, the light induced drift was clearly observed in a larger reaction cell than those ever reported. It is thought that a highly efficient isotope separation is possible by our method.