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

A Study on Radiation Triggered Laser as Neutron Detector

辐射触发激光中子探测器的研究

基本信息

批准号：
01460262
负责人：
NAKAZAWA Masaharu
金额：
$ 3.78万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1989
资助国家：
日本
起止时间：
1989 至 1990
项目状态：
已结题

项目摘要

The aim of this research is an experimental study on a new laser oscillation mode by radiation irradiation on laser tude, named as radiation trigger laser, as a radiation detector. This new operation mode of 3He-Ne laser tube by neutron irradiation has been found in the previous year, where the decreasing effect of laser oscillation starting voltage has been found according to the increase of neutron flux level.1. Model of Radiation Trigger LaserOther commercial 3He-Ne laser tube, the operation circuit of which is called as high frequency oscillation mode instead of the constant voltage mode, has been found not to be available as the radiation trigger laser experimentally. Recent diode laser is also not available. From these results, the operation model of this radiation trigger laser can be considered just as the same as the radiation gas counter operation model, where the gas multiplication factor can be increased by the applied stationery voltage.2. Laser Light Amplification by 3HeーNe gas Cell under Neutron IrradiationWhen the 3HeーNe gas cell is made to be inverse population atate by neutron irradiation, the 3HeーNe laser light can be amplified by passing through this gas cell, which can be confirmed experimentally. The amplification gain can be increased by the neutron flux level. This effect can be considered as the beginning stage growing to the neutron pumping laser, and this is also considered as another radiation trigger laser.3. Conclusion and DiscussionFundamental model of radiation trigger laser can be summarized. Reactor neutron detection system using this radiation trigger laser has been discussed. Based on this model, more practical study is expected on design and demonstration of this radiation trigger laser as neutron detector.

本研究的目的是对一种新的激光振荡模式进行实验研究，该模式是通过辐射照射激光器激光器作为辐射探测器，称为辐射触发激光器。这种中子辐照3He-Ne激光管的新工作模式是在去年发现的，其中发现激光振荡启动电压随中子通量水平的增加而减小。辐射触发激光器的模型其他商用3He-Ne激光管，其工作电路称为高频振荡模式，而不是恒压模式，实验发现不能作为辐射触发激光器。最近的二极管激光器也不可用。从这些结果来看，该辐射触发激光器的工作模型可以看作与辐射气体计数器工作模型相同，其中气体倍增因子可以通过施加的固定电压来增加。中子辐照下3He - Ne气体池的激光放大当3He - Ne气体池被中子辐照成逆居群态时，3He - Ne激光可以通过气体池被放大，实验证实了这一点。放大增益可以随中子通量的增加而增加。这种效应可以认为是中子泵浦激光器生长的起始阶段，也可以认为是另一种辐射触发激光器。总结了辐射触发激光器的基本模型。讨论了利用该辐射触发激光器的反应堆中子探测系统。在此基础上，期望对该辐射触发激光器作为中子探测器的设计和论证进行更实际的研究。