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Development of advanced monoenegetic neutron source using a tandem accelerator and its neutron beam applications

使用串联加速器开发先进单能中子源及其中子束应用

基本信息

批准号：
13558064
负责人：
WATNANABE Yukinobu
金额：
$ 5.25万
依托单位：
Kyushu University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2003
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13558064/
关键词：
accelerator-driven neutron source inverse(p,n) reaction kinematics MeV region monoenergetic neutron tandem accelerator neutron spectrometer neutron nuclear data soft errors in semiconductor devices MeV (p, n)逆運動学水素ガスターゲット高速中性子スペクトロ

项目摘要

We have developed a new type of monoenergetic neutron source in the MeV region at Kyushu University Tandem Accelerator Laboratory(KUTL). The ^1H(^<13>C,n) reaction was chosen as a nuclear reaction to generate a monoenergetic neutron, which is based on the inverse(p,n) reaction kinematics and a neutron is expected to be emitted in the forward cone within a limited angle. A feasibility test experiment was performed using a 59.3MeV ^<13>C^<6+> beam incident on a hydrogen gas target. It was shown that kinematically collimated monoenergetic neutrons with 7.2MeV at 0 degree can be produced in the forward cone within 30 degree as expected by a neutron source simulation calculation. In addition, an optimization of a beam pulsing system was made for TOF experiments, and the time width of 3.8ns was achieved for a 4.0-MeVdeuteron beam. Also, high performance neutron spectrometers based on a recoil proton method were developed and their performance tests were made. An active radiator proton recoil counter telescope and a ray-trace-type proton recoil counter telescope were designed and fabricated. The performance of a fast neutron spectrometer with ^6Li capture gate was investigated for a MeV neutron monitor. As a result, it was demonstrated that these, neutron spectrometers are applicable to future experiments using the developed neutron source. Furthermore, a database of neutron cross sections for C,Mg,and Si up to 3GeV was developed and the neutron-induced soft error in semiconductor devices was studied in relation with future neutron beam applications.

我们在九州大学串列加速器实验室（KUTL）开发了一种MeV区域的新型单能中子源。选择^1H（^<13>C，n）反应作为产生单能中子的核反应，其基于逆（p，n）反应动力学，并且中子预期在有限角度内在前锥中发射。利用59.3MeV ~ 2C <13>^<6+>束入射到氢气靶上进行了可行性测试实验。中子源模拟计算结果表明，在30 °内的前锥中可以产生0 °处7.2MeV的运动学准直单能中子。此外，对TOF实验中的束流脉冲系统进行了优化设计，获得了4.0 MeV氘束流脉冲时间宽度为3.8ns的束流脉冲。此外，还研制了基于反冲质子法的高性能中子谱仪，并对其进行了性能测试。设计并制作了主动辐射式质子反冲计数望远镜和光线追迹式质子反冲计数望远镜。研究了用于MeV中子监测器的^6Li俘获门快中子谱仪的性能。结果表明，这些中子谱仪适用于使用开发的中子源的未来实验。此外，中子截面为C，Mg，和Si的数据库开发到3GeV和中子引起的软错误在半导体器件中的研究与未来的中子束应用。