Stability of electrons and X-rays generated in a pyroelectric accelerator
Stability of electrons and X-rays generated in a pyroelectric accelerator
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热释电加速器中产生的电子和 X 射线的稳定性
DOI：
10.1016/j.nima.2024.169134
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发表时间：
2024
期刊：
影响因子：
--
通讯作者：
Ali M
中科院分区：
文献类型：
--
作者：
Ali M
传统的 X 射线源体积太大并且需要高功率直流电压。热释电 X 射线发生器技术使我们能够开发便携式、低功率 X 射线源，用于材料分析、成像和其他应用。在中等真空条件下改变单晶钽酸锂 (LiTaO3) 的温度提供了产生电子并将其加速至 100 keV 的诱人可能性。电子从晶体或目标中喷射（取决于极性）。然后电子通过轫致辐射和特征 X 射线发射过程产生 X 射线。本实验研究的目的是探索热释电加速器的有趣特征，即产生峰值能量长期稳定的单能电子通量。在这里，我们研究了热释电加速器中电子通量的特征取决于残余气体的压力以及晶体与目标准直器之间的距离。我们研究了单能电子产生和雪崩放电之间的相关性。我们还研究了一些加速器组件的排气情况。目前正在开发的热释电X射线发生器技术是一种可靠、紧凑、稳定、可重复、参数可控的X射线源，不需要高功率直流电压或使用危险（放射性）材料。
Conventional X-ray sources are far too bulky and require a high-power DC voltage. The pyroelectric X-ray generator technology has enabled us to develop portable, low-power X-ray sources for use in materials analysis, imaging, and other applications. Changing the temperature of single crystal lithium tantalate (LiTaO3) at moderate vacuum conditions gives an attractive possibility to generate and accelerate electron up to 100 keV. The electrons are ejected either from the crystal or from the target (depending on polarity). The electrons then generate X-rays via bremsstrahlung and characteristic X-ray emission processes. The aim of this experimental investigation is to explore the interesting feature of the pyroelectric accelerator that generates a monoenergetic electron flux with a stable value of peak energy for a long time. Here we present studies of features of electron flux in pyroelectric accelerator depending on the pressure of residual gas and the distance between the crystal and the target-collimator. We examine the correlation between monoenergetic electron production and avalanche discharge. We also studied outgassing from some accelerator components. The pyroelectric X-ray generator technology is currently being developed is a reliable, compact, stable, and reproducible X-ray source with controllable parameters, which does not require a high-power DC voltage or the use of hazardous (radioactive) materials.
由 LiNbO3 和 LiTaO3 热释电晶体电子加速器产生的 X 射线荧光高 Z（最高 Z=82）K x 射线
影响因子：
4
作者：
J. Brownridge;S. Shafroth
通讯作者：
S. Shafroth
DOI：
--
发表时间：
2002
期刊：
影响因子：
--
作者：
J. Brownridge;S. Shafroth
通讯作者：
S. Shafroth
影响因子：
4
作者：
Brownridge, JD;Shafroth, SM
通讯作者：
Shafroth, SM