基于光学成像的束流截面分布诊断系统

Beam profile diagnostics based on optical imaging system

为了准确测量加速器氘离子的束流截面分布,开展了光学成像系统的设计研究。根据截面分布测量的要求,设计了光学成像系统的指标参数。采用光学设计软件ZEMAX进行了光学成像系统的设计,并通过标准白光光源和线对率板对成像效果进行检验。设计和检验的结果表明,该光学成像系统的总体成像质量较好,畸变小于0.05%,在光学分辨率为30lp/mm的条件下,中心和边缘视场的调制传递函数(MTF)值均大于0.7。将完成设计加工的光学成像系统应用于氘离子束流截面分布测量实验,实验结果初步表明,基于荧光屏的光学方法测量束流截面分布是可行的。

Technology index of the optical imaging system was designed for the purpose of accelerator deuterium ion beam profile measurement.ZEMAX was used to design and simulate the optical imaging system.The standard white light source and line pair board were used to check the design result.It was shown from the design result that this optical imaging system had good image quality.Distortion was lower than 0.05 %.The MTFs of the center field and the edge field were higher than 0.7 with an optical resolution of 30 lp/mm.The experiment result of the optical imaging system used in the beam profile measurement showed that the diagnostic method based on scintillator screen was feasible.