Trigger RD for CMS at SLHC
Trigger RD for CMS at SLHC
复制标题
在 SLHC 触发 CMS 的 RD
DOI：
10.5170/cern-2009-006.249
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发表时间：
2009
影响因子：
1.3
通讯作者：
M. Hansen
中科院分区：
文献类型：
--
作者：
G. Iles;J. Jones;C. Foudas;M. Hansen
欧洲核子研究中心公布了一项升级大型强子对撞机质子-质子加速器的全面计划，以提供更高的光度，通常称为超级大型强子对撞机(SLHC)[1]。该计划设想了两个阶段的升级，在此期间，大型强子对撞机的光度逐渐增加，达到6-7×1034厘米-2秒-1。在过去的一年里，CMS举办了一系列研讨会和研究，确定了升级实验以适应SLHC环境的路线图。光度的增加将增加CMS的背景和挑战，CMS升级计划的主要部分是一个新的一级触发(L1T)系统，该系统将能够应对SLHC的高背景环境。CMS的两个主要里程碑将定义CMS触发升级的演变：第一阶段期间强子量热计电子设备的变化和第二阶段期间径迹触发的引入。本文概述了一种新的触发系统的替代设计及其对成本、延迟、复杂性和灵活性的影响。特别是，它着眼于如何将CMS的触发几何图形映射到最新一代的硬件上，同时保持与当前基础设施的向后兼容。在这次会议上发表的另一篇论文[2]着眼于如果触发系统的大部分被改变，或者增加额外的硬件来创建时分复用触发系统，可能会发生什么。
CERN has made public a comprehensive plan for upgrading the LHC proton-proton accelerator to provide increased luminosity commonly referred to as Super LHC (SLHC) [1]. The plan envisages two phases of upgrades during which the LHC luminosity increases gradually to reach between 6-7×10 34 cm -2 sec -1 . Over the past year, CMS has responded with a series of workshops and studies which have defined the roadmap for upgrading the experiment to cope with the SLHC environment. Increased luminosity will result in increased backgrounds and challenges for CMS and a major part of the CMS upgrade plan is a new Level-1 Trigger (L1T) system which will be able to cope with the high background environment at the SLHC. Two major CMS milestones will define the evolution of the CMS trigger upgrades: The change of the Hadronic Calorimeter electronics during phase-I and the introduction of the track trigger during phase-II. This paper outlines alternative designs for a new trigger system and the consequences for cost, latency, complexity and flexibility. In particular, it looks at how the trigger geometry of CMS could be mapped onto the latest generation of hardware while remaining backwards compatible with current infrastructure. A separate paper presented at this conference [2] looks at what could be possible if large parts of the trigger system were changed, or additional hardware added to create a time multiplexed trigger system.