CERN Accelerating science

CERN Document Server Намерени са 3 записа  Търсенето отне 0.92 секунди. 
1.
40 MHz Level-1 Trigger Scouting for CMS / CMS Collaboration
The CMS experiment will be upgraded for operation at the High-Luminosity LHC to maintain and extend its physics performance under extreme pileup conditions. Upgrades will include an entirely new tracking system, supplemented by a track finder processor providing tracks at Level-1, as well as a high-granularity calorimeter in the endcap region. [...]
CMS-CR-2020-076.- Geneva : CERN, 2020 - 7 p. - Published in : EPJ Web Conf. 245 (2020) 01032 Fulltext: PDF;
In : 24th International Conference on Computing in High Energy and Nuclear Physics, Adelaide, Australia, 4 - 8 Nov 2019, pp.01032
2.
The Phase-2 Upgrade of the CMS Data Acquisition / CMS Collaboration
The High Luminosity LHC (HL-LHC) will start operating in 2027 after the third Long Shutdown (LS3), and is designed to provide an ultimate instantaneous luminosity of $7.5\times10^{34}$ cm$^{-2}$ s$^{-1}$, at the price of extreme pileup of up to 200 interactions percrossing. The number of overlapping interactions in HL-LHC collisions, their density, and the resulting intense radiation environment, warrant an almost complete upgrade of the CMS detector.The upgraded CMS detector will be read out by approximately 50 thousand high-speed front-end optical links at an unprecedented data rate of up to 80~Tb/s,for an average expected total event size of approximately 7-10 MB.Following the present established design, the CMS trigger and data acquisition system will continue to feature two trigger levels, with only one synchronous hardware-based Level-1 Trigger (L1),consisting of custom electronic boards and operating on dedicated data streams, and a second level, the High Level Trigger (HLT), using software algorithms running asynchronously on standard processors and making use of the full detector data to select events for offline storage and analysis.The upgraded CMS data acquisition system will collect data fragments for Level-1 accepted events from the detector back-end modules at a rate up to 750 kHz, aggregate fragments corresponding to individual Level-1 accepts into events, and distribute them to the HLT processors where they will be further selected. [...]
CMS-CR-2021-076.- Geneva : CERN, 2021 - 12 p. - Published in : EPJ Web Conf. 251 (2021) 04023 Fulltext: PDF;
In : 25th International Conference on Computing in High-Energy and Nuclear Physics (CHEP), Online, Online, 17 - 21 May 2021, pp.04023
3.
DAQExpert the service to increase CMS data-taking efficiency / Badaro, Gilbert (American U. of Beirut) ; Behrens, Ulf (Rice U.) ; Branson, James (UC, San Diego) ; Brummer, Philipp (CERN ; KIT, Karlsruhe) ; Cittolin, Sergio (UC, San Diego) ; Da Silva-Gomes, Diego (Fermilab ; CERN) ; Darlea, Georgiana-Lavinia (MIT) ; Deldicque, Christian (CERN) ; Dobson, Marc (CERN) ; Doualot, Nicolas (Fermilab ; CERN) et al.
The Data Acquisition (DAQ) system of the Compact Muon Solenoid (CMS) experiment at the LHC is a complex system responsible for the data readout, event building and recording of accepted events. Its proper functioning plays a critical role in the data-taking efficiency of the CMS experiment. [...]
2020 - 7 p. - Published in : EPJ Web Conf. 245 (2020) 01028 Fulltext from publisher: PDF;
In : 24th International Conference on Computing in High Energy and Nuclear Physics, Adelaide, Australia, 4 - 8 Nov 2019, pp.01028

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