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中国科学院高能物理研究所提出了ERL-FEL(Energy recovery linac-Free electron laser)“一机两用”的概念,通过同一直线加速器将能量回收加速器(Energy recovery linac,ERL)和自由电子激光(Free electron laser,FEL)结合到一起。本文讨论ERL-FEL两用实验装置主体屏蔽设计中,利用离散抽样的方法实现多个损失源项的整合,在同一FLUKA用户程序中实现多源抽样,并将蒙特卡罗计算结果与各源项独立处理的累积结果进行对比。计算表明,两者的结果吻合较好。基于束流损失源项整体建模的方法适用于其他小型直线加速器的整体屏蔽计算,可方便在其他装置上扩展应用。
The Institute of High Energy Physics, Chinese Academy of Sciences has proposed the concept of “ERL-FEL (Energy Recovery linac-Free Electron Laser)”, which combines energy recovery linac (ERL) and free electron laser (Free electron laser, FEL) together. This article discusses the ERL-FEL dual-purpose experimental device main shield design, the use of discrete sampling method to achieve the integration of multiple loss source items in the same FLUKA user program to achieve multi-source sampling and Monte Carlo calculation results with the source The cumulative result of independent treatment is compared. Calculations show that the two results are in good agreement. The method of global modeling based on beam source is suitable for the overall shielding calculation of other small linear accelerators, which can be easily extended on other devices.