【摘要】 对包含非线性六极场储存环的线性tune(Qx,Qy)加以余弦调制 ,通过计算粒子轨道沿相角畸变的动力学孔径 ,研究了tune调制对储存环中粒子运动横向稳定性的影响 .从模拟结果可以看出 ,tune调制对粒子稳定性的影响是一种长期效应 .当调制振幅很小、调制tune远离共振岛tune值时 ,对粒子稳定性的影响很小 ,随着调制振幅增大 ,调制tune接近共振岛tune ,影响越来越明显 .更多还原

【Abstract】 The transverse stability is a critical issue in circular accelerator. In this paper, we analysed the effect of tune modulation on a FODO lattice with sextupole nonlinear through estimating the dynamic aperture including the influence of the distortion along the phase. It turned out that the tune modulation decreases the stability of particle in storage ring, the extent of this decrease depends largely on the amplitude and tune of modulation.更多还原