中文摘要：

用RELAX3D模拟分离作用射频四极场（SFRFQ）加速结构中傍轴下的电场分布，并分析了膜片孔径、加速间隙等参数对粒子能量增益的影响，找到了设计SFRFQ电极的一般方法，使得在极间电压为70kV的情况下（以0^＋为例），粒子通过一个周期单元，可获得100keV以上的能量增益，小球微扰法的测量值与模拟结果能很好的符合．

英文摘要：

The simulated and measured electric field distributions along the separated function radio frequency quadrupoles（SFRFQ） are presented in this paper. Based on the simulations, the parameters of flake-electrode and the effective gap voltage gain have been optimized. As a,design example, one set of SFRFQ electrode with 5 periods and inter-electrode voltage 70 kV is designed to accelerate 0^＋ from 1MeV to 1.5MeV.