Stability diagrams of colliding beams in the Large Hadron Collider

被引：16

作者：

Buffat, X. ^{[1
,2
]}

Herr, W. ^{[1
]}

Mounet, N. ^{[1
]}

Pieloni, T. ^{[1
]}

White, S. ^{[3
]}

机构：

[1] CERN, CH-1211 Geneva, Switzerland

[2] Ecole Polytech Fed Lausanne, CH-1015 Lausanne, Switzerland

[3] Brookhaven Natl Lab, Upton, NY 11973 USA

来源：

PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS | 2014年 / 17卷 / 11期

关键词：

D O I：

10.1103/PhysRevSTAB.17.111002

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Most hadron synchrotrons rely on lattice nonlinearities for Landau damping of impedance driven coherent modes of oscillation. However, in a collider, the presence of beam-beam interactions strongly modifies the transverse amplitude detuning and therefore the resulting stability diagram. A numerical tool to evaluate the effect of beam-beam on the stability diagram has been developed and is used to discuss observations during different phases of the operational cycle of the Large Hadron Collider during the 2012 proton run. In particular, we show the evolution of the stability diagram when the strength of long range beam-beam interactions is increased, during the betatron squeeze. Also, we investigate the stability of beams colliding with a small transverse offset and compare to observations of instabilities when bringing the beams into collision and while leveling the luminosity.

引用

页数：9

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