【摘要】 TRIUMF的三期升级工程(ARIEL)计划建造一个50 MeV平均流强为10 mA的电子直线加速器作为注入器,通过光裂反应生成放射性核素。电子直线加速器包括两个主要部分:注入器和后加速器,注入器完成电子能量从100 keV到10MeV的转换,随后的后加速器将电子能量从10 MeV加速到50 MeV。电子源拟采用重复频率为650 MHz的热电子枪提供初始能量为100 keV,束长为171 ps的电子束。束流动力学模拟了几种不同的设计方案以获得最优化的设计,模拟显示通过对腔体以及聚焦元件的仔细设计以及电子枪出射电子的参数选择,电子束能量在达到50 MeV时束长可以被聚焦到11.75 ps(对应于1.3 GHz频率下5.5°),并且可以使电子束在超导低温柜中的尺寸保持在1.26 cm以下。更多还原

【Abstract】 The proposed TRIUMF ARIEL project plans to build a 50 MeV electron linac at 10 mA to produce radioactive ion beams through photo-fission.The electron linac includes two major parts: injector section and driver linac.The injector section is required to accelerate electron beams from 100 keV to 10 MeV,and the following driver linac boosts the energy from 10 MeV to 50 MeV.The electron initial energy from the thermionic gun is 100 keV and 171 ps bunch length with a repetition rate of 650 MHz.Several variants of configurations have been proposed and studied to get an optimized solution.Simulations show that with careful design and specific input parameters after the gun,the beam at 50 MeV can be bunched into 11.75 ps(5.5° at 1.3 GHz) with the maximum beam size inside the superconducting cryomodule less than 1.26 cm.更多还原