Upgrade of the CMS muon trigger system in the barrel region

被引:2
|
作者
Rabady, Dinyar [1 ]
Ero, Janos [1 ]
Flouris, Giannis [2 ]
Fulcher, Jonathan [3 ]
Loukas, Nikitas [2 ]
Paradas, Evangelos [2 ]
Reis, Thomas [3 ]
Sakulin, Hannes [3 ]
Wulz, Claudia-Elisabeth [3 ]
机构
[1] Inst High Energy Phys Vienna HEPHY, Nikolsdorfer Gasse 18, A-1050 Vienna, Austria
[2] Univ Ioannina, GR-45110 Ioannina, Greece
[3] CERN, CH-1211 Geneva 23, Switzerland
来源
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2017年 / 845卷
关键词
CERN; CMS; Trigger; Muon; Electronics;
D O I
10.1016/j.nima.2016.05.071
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
To maintain the excellent performance shown during the LHC's Run-1 the Level-1 Trigger of the Compact Muon Solenoid experiment underwent a significant upgrade. One part of this upgrade is the re-organization of the muon trigger path from a subsystem-centric view in which hits in the drift tubes (DT), the cathode strip chambers (CSC), and the resistive plate chambers (RPC) were treated separately in dedicated track-finding systems to one in which complementary detector systems for a given region (barrel, overlap, and endcap) are merged at the track-finding level. This fundamental restructuring of the muon trigger system required the development of a system to receive track candidates from the track-finding layer, remove potential duplicate tracks, and forward the best candidates to the global decision layer. An overview will be given of the new track-finder system for the barrel region, the Barrel Muon Track Finder (BMTF), as well as the cancel-out and sorting layer: the upgraded Global Muon Trigger (mu GMT). Both the BMTF and mu GMT have been implemented in a Xilinx Virtex-7 card utilizing the microTCA architecture. While the BMTF improves on the proven and well-tested algorithms used in the Drift Tube Track Finder during Run-1, the mu GMT is an almost complete re-development due to the re-organization of the underlying systems from track-finders for a specific detector to regional track finders covering a given area of the whole detector. Additionally the mu GMT calculates a muon's isolation using energy information received from the calorimeter trigger. This information is added to the muon objects forwarded to the global decision layer, the so-called Global Trigger. (C) 2016 The Authors. Published by Elsevier B.V.
引用
收藏
页码:616 / 620
页数:5
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