论文标题
螃蟹交叉方案的同步 - 贝特子共鸣，具有较大的交叉角度和有限的束长度
Synchro-betatron Resonance of Crab Crossing Scheme with Large Crossing Angle and Finite Bunch Length
论文作者
论文摘要
螃蟹交叉方案是一个必不可少的碰撞方案，可为具有较大交叉角度的未来山脉获得高光度。但是，当一个或两个碰撞光束的束长与蟹腔电压的波长相当时，蟹踢的非线性依赖性可能会对碰撞梁的束动力学构成挑战，并影响光束质量以及亮度寿命。在本文中，使用分析和数值研究提出了螃蟹交叉方案中非线性动力学的结果。结果表明，高阶同步 - 贝特子共振在蟹交叉方案中可能会激发较大的交叉角度，从而导致光束质量恶化和亮度降解。这些研究还揭示了抑制同步β共振的可能对策，从而减轻了光束质量和发光度的降解。
Crab crossing scheme is an essential collision scheme to achieve high luminosity for the future colliders with large crossing angles. However, when bunch length of one or both colliding beams is comparable with the wavelength of the crab cavity voltage, the nonlinear dependence of the crabbing kick may present a challenge to the beam dynamics of the colliding beams and impact the beam quality as well as the luminosity lifetime. In this paper, the results of nonlinear dynamics in the crab crossing scheme are presented, using both analytical and numerical studies. The result indicates that higher-order synchro-betatron resonances may be excited in the crab crossing scheme with large crossing angle, which causes the beam quality deterioration and luminosity degradation. The studies also reveal possible countermeasures to suppress the synchro-beta resonance, hence mitigate the degradation of beam quality and luminosity.
