Structural design of fluence measurement system for pulse hard X-ray
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摘要: 确定了利用全吸收法测量硬X射线能注量的技术方案,阐述了能注量测量的基本原理。结合实际测量环境,选择光电管和高密度硅酸镥闪烁体作为测量系统,分析了各个测量组件参数的影响因素。利用蒙特卡罗程序模拟了硬X射线在闪烁体中能量沉积的轴向分布,并计算了光子的透射率,据此确定了硅酸镥闪烁体的厚度为20 mm。完成了准直系统和电磁屏蔽系统的设计,增加了信噪比。Abstract: It was hard to measure the fluence of pulse hard X-ray directly in the field of high power particle beam. The method of measuring the fluence of pulse hard X-ray was defined, and the basic theory of full-cell processes was introduced. The phototubes and LSO scintillators were used to develop the measurement system. The influence of all measurement units was analysed. By using the MCNP Monte-Carlo code, the energy deposition and transmissivity in axial region of the LSO scintillators were calculated when the photons of different energies irradiated the scintillators of different thicknesses. The thickness of the LSO scintillator was given, which was 20 mm. The collimation system and anti-electromagnetic interference system were designed. The signal-to-noise ratio was added.
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Key words:
- pulse hard X-ray /
- fluence /
- scintillation probe /
- LSO scintillator
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