Development Research of Supermirror Neutron Turbine for an Intense Ultracold Neutron Source at Accelerator Facilities

加速器装置强超冷中子源超镜中子涡轮机的研制

• 批准号: 10358011
• 负责人: UTSURO Masahiko
• 金额: $ 9.47万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10358011/
• 关键词: Reflection feather; spinning machine; palse neutron; Ultracold Neutron Source; Simutaneous control; neutron deceleration machine; super mirror; Ultracold neutron; 中性子鏡; 多層膜鏡; 反射率; 中性子タービン

The present Grant-in-Aid for Scientific Research was given for the development research on a supermirror neurtron turbine for an intense ultracold neutron source at accelerator facilities Conventional ultracold neutron sources were applied for steady state sources by making use of neutron reflection mirrors rotating at a constant speed, named "Neutron turbine", or for pulsed neutron sources by making use of Bragg reflections with crystal blades rotating at a constant speed, named "Doppler shifter", which is capable of functioning only for a certain velocity of incident neutrons. The present development was carried out for realizing an unique rotating device having a special performence of continuously working to convert the wide velocity region of incident neutrons arriving at the time-of-flight distribution to the device located at a distance from the pulsed source.In the course of the present study, a novel principle and the new mechanism solving the required difficult characteristics were invented from the joint works of the head investigator with a collaborator of the mechanical design specialist. Thus, the special performence of continuously working to convert the velocity of incident neutrons arriving at the time-of-flight distribution into the device located at a distance from the pulsed source was successfully realized.

目前的科学研究补助金是为加速器设施的强超冷中子源的超镜中子涡轮机的开发研究提供的。常规超冷中子源通过利用以恒定速度旋转的中子反射镜而被应用于稳态源，称为“中子涡轮机”，或者对于脉冲中子源，通过利用具有以恒定速度旋转的晶体叶片的布拉格反射，称为“多普勒移位器”，其能够仅对入射中子的一定速度起作用。目前的发展是为了实现一种独特的旋转装置，该装置具有连续工作的特殊性能，以将到达飞行时间分布的入射中子的宽速度区域转换到位于离脉冲源一定距离处的装置。一个新的原则和新的机制，解决了所需的困难的特点，发明了从联合工程的首席研究员与合作者的机械设计专家。从而成功地实现了在距离脉冲源一定距离的装置中连续工作以将到达飞行时间分布的入射中子的速度转换为入射中子的速度的特殊性能。

项目成果

M.Utsuro et al.: "Experiment on the subcritical transmission probability of very cold neutrons" to be published in Ann Rep.ILL-1988. (1999)

M.Utsuro 等人：“极冷中子的亚临界传输概率实验”将在 Ann Rep.ILL-1988 上发表。