Spectral reconstruction of the flash X-ray generated by Dragon-I LIA based on transmission measurements

被引：2

作者：

曹靖 ^{[1
,2
]}

肖睿 ^{[1
,2
]}

陈楠 ^{[3
]}

曹宏睿 ^{[1
,2
]}

阴泽杰 ^{[1
,2
]}

机构：

[1] State Key Laboratory of Particle Detection and Electronics,University of Science and Technology of China

[2] Department of Modern Physics, University of Science and Technology of China

[3] Institute of Fluid Physics, China Academy of Engineering Physics

来源：

NuclearScienceandTechniques | 2015年 / 26卷 / 04期

基金：

中国国家自然科学基金;

关键词：

X-ray spectra; Dragon-I; Spectral reconstruction; Transmission measurements; Geant4;

D O I：

10.13538/j.1001-8042/nst.26.040403

中图分类号：

O434.1 [X射线];

学科分类号：

070207 ; 0803 ;

摘要：

The Dragon-I linear induction accelerator(LIA)at China Academy of Engineering Physics generates 20 Me V flash X-rays mainly for radiography applications in fluid dynamics.Its spectral information is quite important for diagnostic X-ray imaging applications,but because of its short pulse and great radiation intensity,direct measurement is impossible.In this work,we propose a new method based on transmission measurements to obtain the flash X-ray spectrum.Pure iron cylinders were used as attenuation material,and alanine dosimeters were attached on their rear bottom to record the dose after different degrees of attenuation.Iterative least square method was used to unfold the spectrum,while Geant4 Monte Carlo code was used to simulate the X-ray spectrum.The unfolded spectrum and the simulated spectrum have a high degree of consistency,with the reduced chi-square value of 0.044.This shows that the method is reliable in estimating megavoltage highintensity X-ray spectrum.

引用

页码：63 / 66

页数：4

共 12 条

[11] Robust megavoltage x-ray spectra estimation from transmission measurements .2 Manciu,Marian,Manciu,Felicia S,Vulcan,Teodor,Nes,Elena,Waggener,Robert G. Journal of X-Ray Science and Technology . 2009
[12] Determination of spectral composition of x-ray radiation from filtration data .2 Silberstein L. J Opt Soc Am . 1932

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