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

Research Development for Producing High Quality Neutron Polarizers

生产高质量中子偏振器的研究进展

基本信息

批准号：
02044010
负责人：
ENDOH Yasuo
金额：
$ 2.43万
依托单位：
Faculty of Science
依托单位国家：
日本
项目类别：
Grant-in-Aid for international Scientific Research
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

项目摘要

This project of "The Research Development for Producing High Quality Neutron Polarizers" was initiated at the time when a new research reactor of JRR3M was just commissioning. JRR3M is the first neutron steady source in Japan, which we designed as beam experiments to be a main purpose. In order to widen neutron usage as well as to improve experimental quality--general, polarized neutrons are regenerated to be available to the experiments. Although there exist several methods to polarize neutrons, none is easy at the current technical status.We decided to apply a traditional method using a Hensler crystal by reflected neutrons by (III) relection is highly polarized. Even it is easily in principle but in fact it remains further research at development in particular for the purpose of producing a high quality neutron polarizer. The collaborative project was proposed to the Institute Laue Langevin (Grenoble, France) which has the world best known monochrometer development group. Dr. M. Nishi has stayed there for a year in total during the period of the collaboration and studied the technique by joining the team for the initial single crystal growth of Hensler crystals to the final performance test. They produced enough amounts of monochrometer pieces for our current purposes to be installed--2 neutron spectrometers belong to both Tohoku University ISSP, University of Tokyo.During the period of this project, two French collaborators, both from Institute Laue Langevin in Grenoble stayed separately at Tohoku University. They were either participating neutron scattering experiments at JAERI or surveyed the research activities of neutron scattering in Japan. They were really impressed by our current projects acting here. Then we discussed the further possibility of the extension in the international collaboration in neutron scattering.

本课题是在JRR 3 M新型研究堆投入运行时启动的。JRR 3 M是日本第一台中子稳定源，我们设计它作为束流实验的主要目的。为了扩大中子的使用范围和提高实验质量，一般采用极化中子再生的方法。虽然有几种方法来消除中子，但在目前的技术状况下，没有一种方法是容易的。我们决定采用一种传统的方法，即利用Hensler晶体通过反射中子来消除中子。（III）反射是高度极化的。即使它在原理上是容易的，但实际上它仍然是进一步的研究在发展中，特别是为了生产高质量的中子极化器。该合作项目是向拥有世界上最著名的单色仪开发小组的劳厄·朗之万研究所（法国格勒诺布尔）提出的。M博士在合作期间，Nishi在那里呆了一年，并通过加入Hensler晶体的初始单晶生长到最终性能测试的团队来研究该技术。他们生产了足够的单色器部件，供我们安装--东北大学ISSP和东京大学的2台中子谱仪。在本项目期间，来自格勒诺布尔劳埃·朗之万研究所的2名法国合作者分别留在东北大学。他们要么参加日本原子能研究所的中子散射实验，要么调查日本的中子散射研究活动。他们对我们目前在这里的项目印象深刻。讨论了在中子散射国际合作中进一步推广的可能性。