电子束参量对轫致辐射照射量角分布的影响

本文研究了电子束半径,发射度及能量等参量对闪光X射线照射量在1m处角分布的影响。求得了使中心照射量最大,束半径与发射度之间应满足的拟合关系,表明了电子束能量越高,发射度越小,那么中心照射量就越大,照射量的空间分布就越理想。对电子细束入射位置和入射方向使用了解析法和随机抽样法求出,两种方法的数值计算所得的照射量分布符合得比较好。

EFFECTS OF BEAM PARAMETERS ON BREMSSTRAHLUNG EXPOSURE ANGULAR DISTRIBUTIONS

Effects of electron beam parameters, including radius, emittance and energy, on bremsstrahlung exposure angular-distributions at a distance of one meter in front of the target, are discussed in this paper. The fit formula for beam radius and emittance is obtained in order to get the maximum forward exposure. The higher the beam energy and the less the emittance, the better the distribution of exposure. The positions and angle spreads of all beamlets are calculated with both analytic and Monte-Carlo methods. The results are in agreement with each other.