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.

本项目是在JRR3M的一座新的研究堆刚刚投产时启动的。JRR3M是日本第一个以束流实验为主要目的的稳态源。为了扩大中子的使用范围和提高实验质量--通常，极化的中子被再生以供实验使用。虽然有几种极化中子的方法，但在目前的技术状况下，没有一种方法是容易的。我们决定采用传统的方法，使用Hensler晶体通过(III)反射的中子反射高度极化。即使它在原理上很容易，但实际上它仍在进一步的研究中，特别是为了生产高质量的中子偏振器。该合作项目是向劳厄·朗之万研究所(法国格勒诺布尔)提出的，该研究所拥有世界上最著名的单色仪开发小组。在合作期间，M.Nishi博士总共在那里呆了一年，通过加入Hensler晶体的初始单晶生长团队到最后的性能测试来研究这项技术。他们生产了足够多的单色仪部件，可以用于我们目前的目的--两台中子谱仪都属于东北大学ISSP，东京大学。在这个项目期间，两名法国合作者，都来自格勒诺布尔的劳厄·朗之万研究所，分别住在东北大学。他们要么参加了日本原子能机构的中子散射实验，要么调查了日本的中子散射研究活动。他们对我们目前在这里开展的项目印象深刻。然后，我们讨论了在中子散射国际合作中进一步扩展的可能性。