scholarly journals High Energy Physics Research with the CMS Experiment at CERN - Energy Frontier Experiment

2017 ◽  
Author(s):  
Gail G. Hanson
Keyword(s):  
High Energy Physics ◽  
High Energy ◽  
Cms Experiment ◽  
Energy Frontier ◽  
Energy Physics

scholarly journals Status and Future of the CMS Tracker DCS

2020 ◽  
Vol 245 ◽  
pp. 01005
Author(s):  
Wassef Karimeh ◽  
Maroun Chammoun ◽  
Ivan Shvetsov ◽  
Andromachi Tsirou ◽  
Piero Giorgio Verdini
Keyword(s):  
High Energy Physics ◽  
High Energy ◽  
Environmental Data ◽  
Software Components ◽  
Cms Experiment ◽  
Tracking Detector ◽  
Safe State ◽  
Software Product ◽  
Efficient Control ◽  
Energy Physics

Detector Control Systems (DCS) for modern High-Energy Physics (HEP) experiments are based on complex distributed (and often redundant) hardware and software implementing real-time operational procedures meant to ensure that the detector is always in a safe state, thus maximizing the lifetime of the detector. Display, archival and often analysis of the environmental data are also part of the tasks assigned to DCS systems. The CMS Tracker Control System (TCS) is a resilient system that has been designed to safely operate the silicon tracking detector in the CMS experiment. It has been built on top of an industrial Supervisory Control and Data Acquisition (SCADA) software product WinCC OA extended with a framework developed at CERN, JCOP, along with CMS and Tracker specific components. The TCS is at present undergoing major architecture redesign which is critical to ensure efficient control of the detector and its future upgrades for the next fifteen years period. In this paper, we will present an overview of the Tracker DCS and the architecture of the software components as well as the associated deliverables.

scholarly journals Analysis of pp and p̄p elastic scatterings based on theoretical bounds in high-energy physics: An update

2017 ◽  
Vol 32 (28n29) ◽  
pp. 1750175 ◽  
Author(s):  
V. A. Okorokov ◽  
S. D. Campos
Keyword(s):  
Cross Sections ◽  
High Energy Physics ◽  
Quantitative Description ◽  
Cosmic Ray ◽  
High Energy ◽  
Hadron Colliders ◽  
Total Cross Sections ◽  
Energy Frontier ◽  
Energy Physics ◽  
Axiomatic Quantum Field Theory

In a previous work a novel parametrization was proposed for the [Formula: see text] and [Formula: see text] total cross-sections. Here, results are presented for the updated analysis with taking into account the recent data from accelerator experiments as well as from cosmic ray measurements. The analytic parametrizations suggested within axiomatic quantum field theory (AQFT) provide the quantitative description of energy dependence of global scattering observables with robust values of fit parameters. Based on the fit results the estimations are derived for the total cross-section and the [Formula: see text] parameter in elastic [Formula: see text] scattering at various [Formula: see text] up to energy frontier [Formula: see text] PeV which can be useful for present and future hadron colliders as well as for cosmic ray measurements at ultra-high energies.

"REDISCOVERING" THE STANDARD MODEL AT CMS

2011 ◽  
Vol 26 (05) ◽  
pp. 309-317
Author(s):  
◽  
DAN GREEN
Keyword(s):  
Large Hadron Collider ◽  
Standard Model ◽  
High Energy Physics ◽  
Hadron Collider ◽  
Late Summer ◽  
High Energy ◽  
Cms Experiment ◽  
The Standard Model ◽  
Energy Physics ◽  
Integrated Luminosity

The Large Hadron Collider (LHC) began 7 TeV C.M. energy operation in April, 2010. The CMS experiment immediately analyzed the earliest data taken in order to "rediscover" the Standard Model (SM) of high energy physics. By the late summer, all SM particles were observed and CMS began to search for physics beyond the SM and beyond the present limits set at the Fermilab Tevatron. The first LHC run ended in Dec., 2010 with a total integrated luminosity of about 45 pb-1 delivered to the experiments.

scholarly journals Kalman Filter track reconstruction on FPGAs for acceleration of the High Level Trigger of the CMS experiment at the HL-LHC

2019 ◽  
Vol 214 ◽  
pp. 01003
Author(s):  
Sioni Summers ◽  
Andrew Rose
Keyword(s):  
Kalman Filter ◽  
High Performance ◽  
High Energy Physics ◽  
Computation Time ◽  
High Energy ◽  
Track Reconstruction ◽  
Level Trigger ◽  
Cms Experiment ◽  
High Level ◽  
Energy Physics

Track reconstruction at the CMS experiment uses the Combinatorial Kalman Filter. The algorithm computation time scales exponentially with pileup, which will pose a problem for the High Level Trigger at the High Luminosity LHC. FPGAs, which are already used extensively in hardware triggers, are becoming more widely used for compute acceleration. With a combination of high performance, energy efficiency, and predictable and low latency, FPGA accelerators are an interesting technology for high energy physics. Here, progress towards porting of the CMS track reconstruction to Maxeler Technologies’ Dataflow Engines is shown, programmed with their high level language MaxJ. The performance is compared to CPUs, and further steps to optimise for the architecture are presented.

The Prospect for Accelerator Superconducting Magnets: HL-LHC and Beyond

2019 ◽  
Vol 10 (01) ◽  
pp. 157-187
Author(s):  
Lucio Rossi ◽  
Davide Tommasini
Keyword(s):  
High Energy Physics ◽  
Superconducting Magnets ◽  
High Temperature Superconductors ◽  
High Energy ◽  
Successful Operation ◽  
New Era ◽  
Accelerator Magnets ◽  
Energy Frontier ◽  
New Phase ◽  
Energy Physics

Superconducting Magnets for High Energy Physics Accelerators are entering a new era. The successful operation of the LHC in the last decade has marked the summit of the Nb-Ti technology exploitation initiated by the Tevatron. Now, after two decades of development, Nb3Sn technology for accelerators is becoming mature and the construction of the high luminosity LHC (HL-LHC) magnets will be the most tangible sign of the new phase, with magnets that will operate well beyond the symbolic threshold of 10 T. In addition, 30 years after its discovery, the high temperature superconductors (HTSs) for accelerator magnets are under development and test, to understand if these materials can enable the 20 T range for next accelerator/colliders foreseen after 2030. The paper reviews the main issues and the criticalities of the magnets’ development for the next future project, HL-LHC, and gives the prospect for the design and technological effort that is underway in magnet technology for the energy Frontier (FCC/HE-LHC).

scholarly journals Producing Madgraph5_aMC@NLO gridpacks and using TensorFlow GPU resources in the CMS HTCondor Global Pool

2019 ◽  
Vol 214 ◽  
pp. 03004
Author(s):  
Brian Paul Bockelman ◽  
Edgar Fajardo Hernandez ◽  
Diego Davila Foyo ◽  
Kenyi Hurtado Anampa ◽  
Farrukh Aftab Khan ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Final Stage ◽  
High Energy Physics ◽  
Workflow Management ◽  
High Energy ◽  
Management Tool ◽  
Matrix Elements ◽  
Cms Experiment ◽  
Globally Distributed ◽  
Energy Physics

The CMS experiment has an HTCondor Global Pool, composed of more than 200K CPU cores available for Monte Carlo production and the analysis of da.The submission of user jobs to this pool is handled by either CRAB, the standard workflow management tool used by CMS users to submit analysis jobs requiring event processing of large amounts of data, or by CMS Connect, a service focused on final stage condor-like analysis jobs and applications that already have a workflow job manager in place. The latest scenario canbring cases in which workflows need further adjustments in order to efficiently work in a globally distributed pool of resources. For instance, the generation of matrix elements for high energy physics processes via Madgraph5_aMC@NLO and the usage of tools not (yet) fully supported by the CMS software, such as Ten-sorFlow with GPUsupport, are tasks with particular requirements. A special adaption, either at the pool factory level (advertising GPU resources) or at the execute level (e.g: to handle special parameters that describe certain needs for the remote execute nodes during submission) is needed in order to adequately work in the CMS global pool. This contribution describes the challenges and efforts performed towards adaptingsuch workflows so they can properly profit from the Global Pool via CMS Connect.

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