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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O+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.
The distribution of the electric field under the paraxial field in the accelerating structure of RF quadrupole field (SFRFQ) was simulated by RELAX3D. The influence of parameters such as the aperture of the diaphragm and the acceleration gap on the energy gain of the particle was analyzed. The general method of designing the SFRFQ electrode was found. When the voltage between the electrodes is 70kV (taking O + as an example), the energy gain above 100keV can be obtained when the particles pass through one cycle unit. The measured value of the ball perturbation method can be in good agreement with the simulation result.