Triggering on electrons, jets and tau leptons with the CMS upgraded calorimeter trigger for the LHC RUN II
File(s)
Published version
Author(s)
Type
Conference Paper
Abstract
The Compact Muon Solenoid (CMS) experiment has implemented a sophisticated two-level online selection system that achieves a rejection factor of nearly 105. During Run II, the LHC will increase its centre-of-mass energy up to 13 TeV and progressively reach an instantaneous luminosity of 2 × 1034 cm−2 s−1. In order to guarantee a successful and ambitious physics programme under this intense environment, the CMS Trigger and Data acquisition (DAQ) system has been upgraded. A novel concept for the L1 calorimeter trigger is introduced: the Time Multiplexed Trigger (TMT) . In this design, nine main processors receive each all of the calorimeter data from an entire event provided by 18 preprocessors. This design is not different from that of the CMS DAQ and HLT systems. The advantage of the TMT architecture is that a global view and full granularity of the calorimeters can be exploited by sophisticated algorithms. The goal is to maintain the current thresholds for calorimeter objects and improve the performance for their selection. The performance of these algorithms will be demonstrated, both in terms of efficiency and rate reduction. The callenging aspects of the pile-up mitigation and firmware design will be presented.
Date Issued
2016-02-03
Date Acceptance
2015-12-14
Citation
Journal of Instrumentation, 2016, 11
ISSN
1748-0221
Publisher
IOP Publishing
Journal / Book Title
Journal of Instrumentation
Volume
11
Copyright Statement
© CERN 2016, published under the terms of the Creative Commons Attribution 3.0
License by IOP Publishing Ltd and Sissa Medialab srl. Any further distribution of this
work must maintain attribution to the author(s) and the published article’s title, journal citation and DOI
License by IOP Publishing Ltd and Sissa Medialab srl. Any further distribution of this
work must maintain attribution to the author(s) and the published article’s title, journal citation and DOI
License URL
Source
Topical Workshop on Electronics for Particle Physics 2015
Subjects
Science & Technology
Technology
Instruments & Instrumentation
Trigger concepts and systems (hardware and software)
Trigger algorithms
Nuclear & Particles Physics
Publication Status
Published
Start Date
2015-09-28
Finish Date
2015-10-02
Coverage Spatial
Lisbon, Portugal