Fig. 1. Sketch diagram of simulated system

Fig. 2. Beam emittance and Twiss parameters in X-direction

Fig. 3. Trajectory characteristics of ion beam (averaged from 70 ns to 100 ns with the interval of 5 ns)

Fig. 4. Energy characteristics of ion beam (averaged from 70 ns to 100 ns with the interval of 5 ns)

Fig. 5. Transient normalized emittance

Fig. 6. Transient acceleration efficiency

Fig. 7. Ion trajectories with different 不同下的离子轨迹

Fig. 8. Kinetic energy distribution ()动能分布()

Fig. 9. Normalized emittance and acceleration efficiency with different 不同下的归一化发射度和加速效率

Fig. 10. Uncontrolled beam ()未调控束流的模拟()

Fig. 11. Ion trajectories with different in Einzel lens mode (, )Einzel单透镜模式下不同的离子轨迹(, )

Fig. 12. Beam optimization with different in Einzel lens mode (, )Einzel单透镜模式下不同离子束流的调控效果(, )

Fig. 13. Regulation of monomer ion velocity in the free space on the right of the thrust face ( is mathematical expectation,PDF is probability density function)推力面右侧单体离子的速度重分配(代表数学期望, PDF为概率密度函数)

Fig. 14. Specific impulse with different in Einzel lens mode (, )Einzel单透镜模式下不同的比冲(, )

Fig. 15. Beam optimization with different in immersion lens mode ()浸没透镜模式下不同的调控效果（）