9Me V电子直线加速器X射线测量  

X-ray dosimetry of 9MeV LINAC

作　　者：潘清[1] 胡和平[1] 陈浩[1] 刘锡三[1] 黎明[1] 金晓[1] 许州[1] 

机构地区：[1]中国工程物理研究院应用电子学研究所,四川绵阳621900

出　　处：《强激光与粒子束》2004年第6期805-808,共4页High Power Laser and Particle Beams

基　　金：国防科技基础研究基金资助课题

摘　　要：高能工业CT采用 9MeV电子加速器产生轫致辐射 ,利用高能X射线能够有效地穿透物质以及不同物质对射线吸收和散射不同这一原理来检查物体内部缺陷或内部结构。加速器电子束的焦点、X射线的最高能量、X射线剂量及均匀性与工业CT成像的质量和速度密切相关 ;对探测器的电子线路部分进行的X射线屏蔽关系到探测器的使用寿命。X射线测量结果表明 ,所用Industrial computerised tomography (CT) adopts electron accelerator to produce the high energy X-ray bremsstrahlung, and makes use of the principle of different absorption coefficient and scattering coefficient when the X-ray cuts through different materials to check the internal blemish or internal structure of the material. The quantity and the speed of creating image of the industrial CT closely relate to the accelerator's focus, the highest X-ray energy, X rays dose and dose uniformity. Protecting the electronics circuit of the detector against X-ray relates to the detector's service life. The X rays measuring results given in this article show that the 9 MeV linear accelerator (LINAC) can satisfy the requirements of high energy industrial CT for checking the material structure and blemish.

关 键 词：Farmer电离室 LiF热释光剂量计 电子直线加速器 X射线剂量 

分 类 号：O571.436[理学—粒子物理与原子核物理] TL53[理学—物理]