等离子体阴极电子束产生的x射线光子在辐射生物学中的应用

F. Gobet, P. Barberet, L. Courtois, G. Devès, J. Gardelle, S. Leblanc, L. Plawinski, H. Seznec
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引用次数: 1

摘要

介绍了一种用于辐射生物学应用的小型低能量高强度x射线源。激光诱导等离子体在30kv二极管内运动,并在阳极位置产生10$^{14}$的电子束。铝箔将这些电子的一部分能量转换成x射线光子,这些光子使用过滤成像板进行表征。这些x射线光子沉积在秀丽隐杆线虫幼虫体内的剂量是通过Geant4模拟计算出来的。它可以通过简单地改变铝箔厚度和二极管电压来设置为10 $\mu$Gy和10 mGy之间的值。因此,这种多功能和紧凑的x射线源为探索由几个数量级变化的剂量率引起的辐射效应开辟了新的途径。
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X-ray photons produced from a plasma-cathode electron beam for radiation biology applications
A compact low-energy and high-intensity X-ray source for radiation biology applications is presented. A laser-induced plasma moves inside a 30 kV diode and produces a beam of 10$^{14}$ electrons at the anode location. An aluminum foil converts a part of the energy of these electrons into X-ray photons which are characterized using filtered imaging plates. The dose that would be deposited by these X-ray photons in C. elegans larvae is calculated from Geant4 simulations. It can be set to a value ranging between 10 $\mu$Gy and 10 mGy per laser shot by simply changing the aluminum foil thickness and the diode voltage. Therefore, this versatile and compact X-ray source opens a new path to explore the radiation effects induced by dose rates varying over several orders of magnitude.
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