Analysis and measurement of optical properties and time characterization of silica aerogel used as a Cherenkov radiator

IF 1.6 3区物理与天体物理 Q2 NUCLEAR SCIENCE & TECHNOLOGY

Radiation Measurements Pub Date : 2024-07-31 DOI:10.1016/j.radmeas.2024.107259

Yihong Yan , Mei Zhang , Liang Sheng , Tao Zhang , Hongqiao Yin , Xiufeng Weng , Yang Li , Weiqiang Sun , Guang Hu , Huasi Hu

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引用次数: 0

Abstract

X-rays generated by high-energy pulsed electron sources can be utilized in tumor treatment. The time spectrum measurement of pulsed electron sources enables precise treatment and provides feedback to the design and construction of accelerators. In this paper, silica aerogel samples of different densities and thicknesses were prepared as Cherenkov radiator. The transmittance and refractive index of these samples were measured, then the absorption and scattering lengths were calculated on the basis of the obtained transmittance. The obtained results were input into Geant4 software to get the intrinsic luminescence time of the silica aerogel of different densities and thicknesses. Finally, a measurement system was constructed with the silica aerogel samples, and the rise time of this system and the silica aerogel were measured by using a picosecond electron accelerator. The results demonstrate that the rise time of the measurement system is below 180 ps and that of the silica aerogel is less than 54.32 ps. It is also proved that the silica aerogel can be used as the Cherenkov radiator for the measurement of the time spectrum of high-energy pulsed electron sources.

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分析和测量用作切伦科夫辐射器的二氧化硅气凝胶的光学特性和时间特性

高能脉冲电子源产生的 X 射线可用于肿瘤治疗。脉冲电子源的时间光谱测量可以实现精确治疗，并为加速器的设计和建造提供反馈。本文制备了不同密度和厚度的二氧化硅气凝胶样品作为切伦科夫辐射器。测量了这些样品的透射率和折射率，然后根据获得的透射率计算了吸收和散射长度。将得到的结果输入 Geant4 软件，即可得到不同密度和厚度的二氧化硅气凝胶的本征发光时间。最后，利用二氧化硅气凝胶样品构建了一个测量系统，并使用皮秒电子加速器测量了该系统和二氧化硅气凝胶的上升时间。结果表明，测量系统的上升时间低于 180 ps，而二氧化硅气凝胶的上升时间小于 54.32 ps。研究还证明，二氧化硅气凝胶可用作切伦科夫辐射器，用于测量高能脉冲电子源的时间光谱。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Radiation Measurements 工程技术-核科学技术

CiteScore

4.10

自引率

20.00%

发文量

116

审稿时长

48 days

期刊介绍： The journal seeks to publish papers that present advances in the following areas: spontaneous and stimulated luminescence (including scintillating materials, thermoluminescence, and optically stimulated luminescence); electron spin resonance of natural and synthetic materials; the physics, design and performance of radiation measurements (including computational modelling such as electronic transport simulations); the novel basic aspects of radiation measurement in medical physics. Studies of energy-transfer phenomena, track physics and microdosimetry are also of interest to the journal. Applications relevant to the journal, particularly where they present novel detection techniques, novel analytical approaches or novel materials, include: personal dosimetry (including dosimetric quantities, active/electronic and passive monitoring techniques for photon, neutron and charged-particle exposures); environmental dosimetry (including methodological advances and predictive models related to radon, but generally excluding local survey results of radon where the main aim is to establish the radiation risk to populations); cosmic and high-energy radiation measurements (including dosimetry, space radiation effects, and single event upsets); dosimetry-based archaeological and Quaternary dating; dosimetry-based approaches to thermochronometry; accident and retrospective dosimetry (including activation detectors), and dosimetry and measurements related to medical applications.