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“神龙一号”强流脉冲加速器由72个直线感应加速腔和18个用于测试和真空泵接口的多功能腔组成。直线感应加速器的研制建造中磁轴对中偏差和聚焦磁场的自然偏差所引起的束流质心偏移轨道中心是不可避免的,由于束脉冲期间存在能散,使束流产生Corkscrew运动,导致束流品质变坏。而束脉冲期间的能散只能减小到一定水平,因此必需采取一定的措施抑制Corkscrew幅度的增长。在加速器的安装阶段,脉冲悬丝技术被应用于准直加速段聚焦磁场,并在磁轴准直测试的同时对磁场固有倾斜偏差进行初步校正。根据脉冲悬丝测试所得实验数据,采用传输矩阵法对加速段束质心轨迹进行了初步估计,计算中考虑了各加速腔聚焦磁场的倾斜和偏移误差。给出了计算结果和分析。
“Shenlong One ” strong current pulse accelerator consists of 72 linear induction acceleration chamber and 18 for testing and vacuum pump interface multi-function chamber. The center of the orbital center of mass due to the natural deviation of the centering axis and the focusing magnetic field in the development of the linear induction accelerator is inevitable. Due to the energy dispersion during the beam pulse, the beam generates Corkscrew motion, Stream quality deteriorates. However, the energy dispersion during beam pulsing can only be reduced to a certain level, so certain measures must be taken to restrain the growth of Corkscrew amplitude. In the installation phase of the accelerator, the pulse suspended filament technology is applied to the focusing magnetic field of the collimation accelerating section, and the magnetic field inherent tilt deviation is preliminarily corrected while the magnetic axis collimation test. According to the experimental data obtained from the pulsed filament test, the transfer matrix method is used to estimate the trajectory of the mass center of the accelerating section, and the tilt and offset errors of the focusing magnetic field are considered. The calculation results and analysis are given.