大型强子对撞机中迎面相互作用的基本束束极限

Physical Review Special Topics-accelerators and Beams Pub Date : 2015-12-15 DOI:10.1103/PHYSREVSTAB.18.121003

K. Ohmi, F. Zimmermann

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引用次数: 8

摘要

强子对撞机的束流极限表现为光度寿命和束流寿命的降低。特别是，当光束强度增加时，非线性光束力会导致非相干发射度增长，而两束碰撞光束之间的(线性)耦合力会导致相干光束不稳定。这些现象可能因晶格误差、外部噪声和其他扰动而增强(或抑制)。我们研究了非相干发射度增长和相干光束不稳定性引起的光度退化。本文从理论上和仿真上讨论了理想机的束束极限以及上述误差对其影响的问题。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Fundamental beam-beam limit from head-on interaction in the Large Hadron Collider

The beam-beam limit at hadron colliders manifests itself in the form of degraded luminosity lifetime and/or reduced beam lifetime. In particular, for increasing beam intensity, the nonlinear beam-beam force causes incoherent emittance growth, while the (linear) coupling force between the two colliding beams can result in coherent beam-beam instabilities. These phenomena may be enhanced (or suppressed) by lattice errors, external noise, and other perturbations. We investigate the luminosity degradation caused both by incoherent emittance growth and by coherent beam-beam instability. The resulting beam-beam limit for an ideal machine and the of question how it is affected by some of the aforementioned errors are discussed in theory and simulation.

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来源期刊

Physical Review Special Topics-accelerators and Beams 物理-物理：核物理

自引率

0.00%

发文量

审稿时长

3-8 weeks

期刊介绍： Physical Review Special Topics - Accelerators and Beams (PRST-AB), is a peer reviewed, purely electronic journal, distributed without charge to readers and funded by contributions from national laboratories. It covers the full range of accelerator science and technology: subsystem and component technologies, beam dynamics; accelerator applications; and design, operation, and improvement of accelerators used in science and industry. This includes accelerators for high-energy and nuclear physics, synchrotron radiation production, spallation neutron sources, medical therapy, and intense beam applications.