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arXiv 1003.0644physics.acc-ph
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具有一个和两个解析不变量的非线性加速器格

Nonlinear Accelerator Lattices with One and Two Analytic Invariants

V. Danilov, S. Nagaitsev

摘要:

可积系统出现在物理学很久以前的开端与经典动力学的例子是开普勒的和其他著名的问题。不幸的是,大多数非线性问题都是不可积的。在加速器术语中,任何二维非线性不可积映射都会产生混沌运动和稳定和不稳定共振的复杂网络。然而,在一个可积系统的附近,这种混沌网络的总体积是很小的。因此,加速器中的可积非线性运动有可能引入大的电子感应加速器调谐扩展,以抑制不稳定性并减轻空间电荷和磁场误差的影响。为了创建这样的加速器晶格,必须找到导致稳定的可积分运动的磁场和电场组合。本文提出了家庭的晶格与一个不变的有界运动可以很容易地创建在大体积的相空间。此外,它提出了3个家庭的可积非线性加速器晶格,实现与坐标相关的磁场或电场与稳定的非线性运动,这可以解决的可分离变量。

英文摘要:

Integrable systems appeared in physics long ago at the onset of classical dynamics with examples being Kepler's and other famous problems. Unfortunately, the majority of nonlinear problems turned out to be nonintegrable. In accelerator terms, any 2D nonlinear nonintegrable mapping produces chaotic motion and a complex network of stable and unstable resonances. Nevertheless, in the proximity of an integrable system the full volume of such a chaotic network is small. Thus, the integrable nonlinear motion in accelerators has the potential to introduce a large betatron tune spread to suppress instabilities and to mitigate the effects of space charge and magnetic field errors. To create such an accelerator lattice one has to find magnetic and electrtic field combinations leading to a stable integrable motion. This paper presents families of lattices with one invariant where bounded motion can be easily created in large volumes of the phase space. In addition, it presents 3 families of integrable nonlinear accelerator lattices, realizable with longitudinal-coordinate-dependent magnetic or electric fields with the stable nonlinear motion, which can be solved in terms of separable variables.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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