Study on the Possibility of Magnetic Deceleration of Neutrons

中子磁减速可能性的研究

基本信息

批准号：
59460214
负责人：
UTSURO Masahiko
金额：
$ 3.01万
依托单位：
Kyoto 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：
1984
资助国家：
日本
起止时间：
1984 至 1985
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-59460214/
关键词：
Neutron deceleration Very cold neutrons Ultracold neutron trapping Strong magnetic field Adiabatic spin flip Neutron guide tube Multi-stage device

项目摘要

Due to the recent interest on the method for the effective production of ultracold neutrons(UCN)which can be used for unique fundamental physics researches, a new approach is investigated in which the magnetic deceleration of very cold neutrons(VCR)is undertaken by using a strong magnetic field coupled with the adiabatic spin flip of neutrons. In the present research, a single unit of the magnetic decelerating device was prepared having the magnitude of the magnetic field near to 10 kG and a very small gradient of the field magnitude of about 10 G/cm which should be important for the realization of the adiabatic spin flip in the magnetic field. By using these properties and the parameter values attained in the present single test unit, some numerical analyses were carried out on the pos. sible. multistage decelerator -apparatus and the expected ultracold neutron trapping performances were studied. Further, concerning the incident VCN to be supplied to the decelbrator apparatus, the VCN facility of KUR reactor was also studied after the arrangement of the new liquid deuterium cold source, and the measured intensity of VCN was much intensified by the preparation of the present cold source. In this way, the present, studies indicated the possibility and the relating necessary' condition's for the UCN trapping in the proposed magnetic decelerator device.

由于最近人们对有效产生超冷中子（UCN）的方法产生了兴趣，该方法可用于独特的基础物理研究，因此研究了一种新方法，其中通过使用磁力减速器来进行极冷中子（VCR）的磁减速。强磁场与中子的绝热自旋翻转相结合。在本研究中，制备了单个磁减速装置，其磁场强度接近10 kG，场强梯度非常小，约为10 G/cm，这对于实现磁减速装置具有重要意义。磁场中的绝热自旋翻转。通过使用这些特性和在当前单个测试单元中获得的参数值，对位置进行了一些数值分析。兄弟姐妹。研究了多级减速器装置和预期的超冷中子俘获性能。此外，对于向减速器装置供应的入射VCN，在布置新的液态氘冷源后，还对KUR反应堆的VCN设施进行了研究，并且通过现有冷源的制备，测得的VCN强度大大增强。来源。这样，目前的研究表明了在所提出的磁减速器装置中捕获UCN的可能性和相关的必要条件。