论文标题
通过跨越非线性2D共振来操纵圆形加速器中的横向发射器
Manipulation of transverse emittances in circular accelerators by crossing non-linear 2D resonances
论文作者
论文摘要
在圆形加速器中带电颗粒梁的横向动力学中控制非线性效应为控制某些梁特性提供了新的可能性。通过越过稳定的1D非线性共振，光束分裂是CERN质子同步器常规操作的一部分。梁在水平面形成的稳定岛中经历捕获和运输，以使朝向超级质子同步器进行多弯提取，其中梁用于固定目标实验。该过程仅作用于水平束发射，诱导其初始值的降低。在本文中，我们介绍了这种方法的概括，其中两个横向平面都受提出的技术影响。我们将详细讨论如何通过对2D非线性共振的受控交叉来操纵横向发射。新技术将通过讨论哈密顿模型的理论分析，并使用更现实的非线性符号图模拟提出的操作的性能。
Controlling non-linear effects in the transverse dynamics of charged particle beams in circular accelerators opens new possibilities for controlling some of the beam properties. Beam splitting by crossing a stable 1D non-linear resonance is part of the routine operation of the CERN Proton Synchrotron. The beam undergoes trapping and transport inside stable islands created in the horizontal plane to allow multi-turn extraction towards the Super Proton Synchrotron, where the beam is used for fixed-target experiments. This process acts only on the horizontal beam emittance, inducing a reduction of its initial value. In this paper, we present a generalisation of this approach, in which both transverse planes are affected by the proposed technique. We will discuss in detail how to manipulate the transverse emittances by means of a controlled crossing of a 2D non-linear resonance. The novel technique will be presented by discussing the theoretical analysis of a Hamiltonian model, as well as simulating the performance of the proposed manipulation using a more realistic non-linear symplectic map.
