LHC upgrade scenarios
LHC upgrade scenarios
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LHC升级场景
DOI：
10.1109/pac.2007.4441113
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
F. Zimmermann
中科院分区：
文献类型：
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作者：
F. Zimmermann
EU CARE-HHH和US-LARP对LHC亮度升级的研究旨在将峰值亮度提高10倍，达到1035 cm-2 s-1。通过重建相互作用区域，结合光束参数的一致变化，可以提高亮度。除了先进的低β四极子外，升级后的红外光谱还可以容纳其他新元素，如嵌入探测器深处的超薄超导偶极子或四极子、全局低角度蟹状腔和远程光束效应的导线补偿器。升级路径的重要限制因素是探测器堆积事件的最大可接受数量，有利于许多紧密间隔的束，以及冷磁束屏幕上的热负荷，指向更少、更强的束。为了将增加的峰值光度转化为相应的更高的综合光度，LHC环的升级应该辅之以注入器复合物的升级。我将介绍大型强子对撞机的首选升级方案，包括相关的光束参数，伴随注入器增强的草图，并简要评论长期的大型强子对撞机能量升级。
The EU CARE-HHH and US-LARP studies for an LHC luminosity upgrade aim at increasing the peak luminosity by a factor of 10, to 1035 cm-2 s-1. The luminosity can be raised by rebuilding the interaction regions (IRs) in combination with a consistent change of beam parameters. In addition to advanced low-beta quadrupoles, the upgraded IRs may accommodate other new elements such as slim superconducting dipoles or quadrupoles embedded deep inside the detectors, global low-angle crab cavities, and wire compensators of long-range beam-beam effects. Important constraints on the upgrade path are the maximum acceptable number of detector pile-up events, favoring many closely spaced bunches, and the heat load on the cold-magnet beam screens, pointing towards fewer and more intense bunches. In order to translate the increased peak luminosity into a correspondingly higher integrated luminosity, the upgrade of the LHC ring should be complemented by an upgrade of the injector complex. I will present preferred upgrade scenarios for the LHC IRs including pertinent beam parameters, sketch accompanying injector enhancements, and briefly comment on a longer-term LHC energy upgrade.