基于Micromegas的裂变室的优化,用于密集的热中子测量
Qi-An Wei1, Xiu-Liang Zhao1, Song Feng1
1School of Nuclear Science and Technology, University of South China, Hengyang 421001, China; Key Laboratory of Advanced Nuclear Energy Design and Safety, Ministry of Education, Hengyang 421001, China.
概括
通过减少漂移区域宽度来优化Micromegas裂变室,可以最大限度地减少电子扩散和重复计数. 这提高了用于高强度热中子测量的探测器容量.
科学领域:
- 核仪器仪表 核仪器仪表 核仪器仪表 核仪器仪表
- 粒子探测物理学 粒子探测物理学
背景情况:
- 微梅加斯探测器为热中子测量提供了广泛的范围和高灵敏度.
- 探测器中的阵列读数会导致多次触发,限制计数能力.
- 优化探测器结构对于减少多通道响应和改善计数范围至关重要.
研究的目的:
- 使用蒙特卡洛模拟来调查探测器性能.
- 分析漂移区域宽度对带电粒子行为的影响.
- 为高强度热中子探测优化裂变室设计.
主要方法:
- 蒙特卡洛模拟用于研究探测器性能指标.
- 对带电粒子横向迁移和扩散的分析.
- 漂移区域宽度对计数率和重复计数的影响的实验验证.
主要成果:
- 漂移区域的宽度显著影响了初级电子的空间分布.
- 高贵气体 (例如,Xe) 和更高的气体压力减少了电子位置的扩散.
- 一个Xe/CF4混合物与1000V/cm电场最小化了电子横向扩散 (FWHM 0.13毫米).
- 限制漂移宽度减少了重复计数;2毫米的漂移宽度产生了21.09%的重复计数比率.
结论:
- 漂移区域宽度是优化Micromegas裂变室的一个关键参数.
- 设计修改可以显著提高计数速率范围,减少多通道响应.
- 这项研究为开发用于强烈中子场的高计数率探测器提供了基础.
更多相关视频
10:24Neutron Radiography and Computed Tomography of Biological Systems at the Oak Ridge National Laboratory's High Flux Isotope Reactor
Published on: May 7, 2021
2.4K
08:48High-Resolution Neutron Spectroscopy to Study Picosecond-Nanosecond Dynamics of Proteins and Hydration Water
Published on: April 28, 2022
1.8K
相关概念视频
02:50Nuclear Fission
10.3K
Many heavier elements with smaller binding energies per nucleon can decompose into more stable elements that have intermediate mass numbers and larger binding energies per nucleon—that is, mass numbers and binding energies per nucleon that are closer to the “peak” of the binding energy graph near 56. Sometimes neutrons are also produced. This decomposition of a large nucleus into smaller pieces is called fission. The breaking is rather random with the formation of a large...
10.3K
02:36Nuclear Power
8.2K
Controlled nuclear fission reactions are used to generate electricity. Any nuclear reactor that produces power via the fission of uranium or plutonium by bombardment with neutrons has six components: nuclear fuel consisting of fissionable material, a nuclear moderator, a neutron source, control rods, reactor coolant, and a shield and containment system.
Nuclear Fuels
Nuclear fuel consists of a fissile isotope, such as uranium-235, which must be present in sufficient quantity to provide a...
Nuclear Fuels
Nuclear fuel consists of a fissile isotope, such as uranium-235, which must be present in sufficient quantity to provide a...
8.2K