CAJ | 학술논문

与 X 射线闪光照相相比，GeV 级质子照相因质子的穿透能力更强而更能满足流体动力学最佳光程、更小不确定度的要求。质子照相用于提取阴影客体信息的过程比 X 射线闪光照相复杂。为了便于分析质子照相过程及其特性，以质子照相的输运过程为基础，逐步考虑了质子与物质相互作用的各种过程---核反应、多次库仑散射、准弹性散射和弹性散射，并获得含各种过程的质子照相理论计算表达式。在含准直的系统中，理论计算公式中包含了多次弹性散射和准弹性散射项。通过与 QMCPrad 计算结果的对比得知弹性散射高斯近似下的理论计算结果与蒙特卡罗方法（MC）计算结果一致，与更准确的“黑体”模型的相对误差为3％～5％。这意味着在某种程序上，当研究质子照相规律或设计系统时，高能质子照相的理论计算公式能够替代MC 模拟。
여 X 사선섬광조상상비，GeV 급질자조상인질자적천투능력경강이경능만족류체동역학최가광정、경소불학정도적요구。질자조상용우제취음영객체신식적과정비 X 사선섬광조상복잡。위료편우분석질자조상과정급기특성，이질자조상적수운과정위기출，축보고필료질자여물질상호작용적각충과정---핵반응、다차고륜산사、준탄성산사화탄성산사，병획득함각충과정적질자조상이론계산표체식。재함준직적계통중，이론계산공식중포함료다차탄성산사화준탄성산사항。통과여 QMCPrad 계산결과적대비득지탄성산사고사근사하적이론계산결과여몽특잡라방법（MC）계산결과일치，여경준학적“흑체”모형적상대오차위3％～5％。저의미착재모충정서상，당연구질자조상규률혹설계계통시，고능질자조상적이론계산공식능구체대MC 모의。
Compared to X-ray radiography,the proton radiography is more suitable for hydro-test experiment because of higher penetration of high-energy proton,and it is easier to gain better result with less uncertainty.The progresses of the proton radiography to form the shadow information inside the object are more complicated.In order to conveniently investigate the proton radiography processes and their characteristics,an empiric formula for high-energy proton radiography is inferred based on the proton’s transportation during the radiographic process.The formula contains the terms of elastic scatter and quasi-elastic scatter with multiple scatter process.The validity of the formula is verified by comparing the analytic result from the formula to the re-sult of MC simulation.The results show that the same results are obtained by formula calculation and MC simulation with the Gaussian scatter type approximation,it is about 3%-5% below the more precise result gained by the MC simulation with black-disk model.The research result implies that the formula can take the place of MC simulation to discover the law of the proton ra-diography and to design the system in some extent.