权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

The Inverse Smith-Purcell Effect at Submillimeter Wavelengths

亚毫米波长下的逆史密斯-珀塞尔效应

基本信息

批准号：
02452173
负责人：
BAE Jongsuck
金额：
$ 3.33万
依托单位：
Research Institute of Electrical Communication, Tohoku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1990
资助国家：
日本
起止时间：
1990 至 1991
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-02452173/
关键词：
Inverse Smith-Purcell effect Grating linac Laser-driven linac CO_2 laser Submillimeter wave laser

项目摘要

This research project has been planned to study the inverse Smith-Purcell (ISP) effect experimentally and theoretically in order to confirm a possibility of an electron accelerating to several GeV/m by a laser-driven linacs.In order to demonstrate the ISP effect at infrared wave region in which a C0_2 laser with an output power more than several TW exists, it has been discaussed theoretically in detail for the experimental results on the effect at submillimeter wave region. It has been found that an output signal of 1000 electrons per second can be obtained in the experiment of the ISP effect which are interacted with an infrared laser light. This shows that an observation of the effect at infrared wavelength of 10.6mum is possible. Based on the discussions described above, an experimental apparatus has been designed and fabricated as follows,1. EMQ-switched CO_2 laser has been developed as a driving laser for an experiment of the ISP effect. This laser is new type Q-switched pulse laser with an output power of 7OkW and a repetition rate up to 9.2kpps for a fundamental Gaussian mode of operation.2. Optical lens system is used to guide an infrared light beam from the C0_2 laser to the grating surface placed in a high vacuum chamber.3. Silicon (Si) Gratng has been fabricated by using an antisotropic etching of Si to keep tolerances within <plus-minus>0.1mum for the designed values of the grating constan4. Electron measurement system can detect electrons below 100 particles per second.

本研究计划从实验和理论上研究逆Smith-Purcell（ISP）效应，以证实电子被激光驱动的直线加速器加速到几GeV/m的可能性，为了证实在输出功率大于几TW的CO_2激光器存在的红外波段的ISP效应，并对亚毫米波区的实验结果进行了详细的理论分析。在与红外激光相互作用的ISP效应实验中，可以获得每秒1000个电子的输出信号。这表明，在10.6 μ m的红外波长下观察效果是可能的。在此基础上，设计并制作了一套实验装置.研制了一种用于ISP效应实验的开关CO_2激光器。该激光器是一种新型的调Q脉冲激光器，其输出功率为70 kW，重复频率高达9.2kpps，工作模式为基模高斯.光学透镜系统用于将来自CO_2激光器的红外光束引导到放置在高真空室中的光栅表面。硅（Si）光栅已制造通过使用各向异性蚀刻的Si，以保持公差在<plus-minus>0.1 μ m内的光栅常数4的设计值。电子测量系统可以检测到每秒100个粒子以下的电子。