Dissertations / Theses on the topic 'CMS High Level Trigger'
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Lorusso, Marco. "FPGA implementation of muon momentum assignment with machine learning at the CMS level-1 trigger." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/23211/.
Full textZhang, Fengwangdong. "Measurement of jet production in association with a Z boson at the LHC and jet energy correction calibration at high level trigger in CMS." Doctoral thesis, Universite Libre de Bruxelles, 2017. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/251804.
Full textCette thèse présente une mesure de la section efficace de production de jets associés à un boson Z dans les collisions proton-proton du Grand Collisionneur de Hadron (LHC) situé au CERN, avec des énergies dans le centre de masse de 8 TeV et 13 TeV, respectivement pour les années 2012 et 2015. Les données utilisées pour cette analyse ont été collectées par le détecteur Compact Muon Solenoid (CMS). Elles constituent des échantillons de luminosités intégrées de 19.6 fb⁻¹ et 2.25 fb⁻¹, respectivement pour 2012 et 2015. Nous mesurons la section efficace différentielle en fonction de la multiplicité de jets, de l’impulsion transverse et de la rapidité des jets, et en fonction de la somme scalaire des impulsions transverses des jets. La corrélation entre les rapidités du boson Z et des jets est aussi mesurée et bénéficie de la large statistique prise en 2012. Toutes les distributions d’observables mesurées sont obtenues après corrections pour les effets détecteurs et les résultats des canaux de désintégration muonique et électronique du boson Z sont combinés. Tenant compte des incertitudes statistiques et systématiques, les mesures sont comparées à différentes prédictions théoriques ayant différents niveaux de précision. Les prédictions sont obtenues de MADGRAPH 5, SHERPA 2 (pour l’analyse à 8 TeV uniquement), MADGRAPH_AMC@NLO, et un modèle fixé au NNLO (pour l’analyse à 13 TeV uniquement). Par ces mesures de précisions, et en particulier celle de la corrélation de rapidités, nous avons acquis une compréhension plus approfondie de la chromodynamique quantique dans son régime perturbatif. Grâce à la plus haute énergie jamais atteinte en laboratoire, et à la grande statistique disponible, nous avons sondé avec précision des endroits de l’espace des phases jusque là inaccessibles.Dans cette thèse, les corrections et la calibration de l’énergie des jets pour le haut niveau de sélection de CMS est également présentée. Durant la période de 2012 à 2015, le LHC a été amélioré, non seulement l’énergie dans le centre de masse a augmenté, mais la luminosité instantanée a aussi été amplifiée. L’écart temporelle entre deux paquets de particules dans les faisceaux du LHC a été réduite. L’une des conséquences est que l’impulsion reconstruite pour les jets produits lors d’un croisement de faisceau à une contribution significative venant des multiples interactions ayant lieux lors du croisement des paquets. Une approche technique dédiée a été développée pour corriger l'impulsion des jets. Les corrections obtenues ont été calibrées aux données prises en 2015 et 2016.
Doctorat en Sciences
info:eu-repo/semantics/nonPublished
Wang, Qun. "Measurement of the differential cross section of Z boson production in association with jets at the LHC." Doctoral thesis, Universite Libre de Bruxelles, 2018. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/271719.
Full textDoctorat en Sciences
info:eu-repo/semantics/nonPublished
Brooke, James. "Level-1 trigger studies for the CMS experiment." Thesis, University of Bristol, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.271850.
Full textDiotalevi, Tommaso. "CMS level-1 trigger muon momentum assignment with machine learning." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amslaurea.unibo.it/16326/.
Full textJames, Tom. "A hardware track-trigger for CMS at the High Luminosity LHC." Thesis, Imperial College London, 2018. http://hdl.handle.net/10044/1/60593.
Full textPrvan, Marina. "Algorithms for the Level-1 trigger with the HGCAL calorimeter for theCMS HL-LHC upgrade." Thesis, Institut polytechnique de Paris, 2020. http://www.theses.fr/2020IPPAX094.
Full textModern instrumentation in high energy physics (HEP) is facing the exponential growth of amount of data from the sensor arrays. This results in an enormous increase of output data volume, which requires in-time upgrades of detectors in HEP experiments. Also, the detector evolution is driven by the need to follow the newest technological trends as well as to replace parts of the mechanical construction that are damaged by radiation. In particular, the detectors at the Large Hadron Collider (LHC) will have to be upgraded before entering the high luminosity (HL) operational phase.This thesis describes the research work done in context of the High Granularity Calorimeter (HGCAL) project, which is part of the upgrade of the Compact Muon Solenoid (CMS) detector. In the challenging environment of HL-LHC, with higher data rates, harder radiation, and high pile-up (PU), where the number of „interesting“ events is low, it is essential to provide a quality decision on whether to read-out the event data or not. This process, called the trigger, should operate in real-time, under constrains of communications and processing limits from the available hardware. The working conditions of the trigger are challenging since the algorithm must be executed in a very limited time, without the possibility to revisit the decision of keeping the event for further processing or not.To cope with HL-LHC requirements, the current trigger system must be upgraded. The thesis presents the related studies that were necessary for the design of such trigger. The presented studies relates to key aspects that were necessary along the whole trigger path from the detector sensors read-out and front-end (FE) selection to the back-end (BE) electronics output data flow. First, a re-design of the mechanical HGCAL construction is studied on forming hexagonal sensor cells as well as larger polyhex structures of trigger cells (TCs) used to reduce the amount of data by using grouping of cells. Once the sensor module of the future HGCAL detector is defined, a large amount of work is devoted to the strategies for further FE data reduction and BE reconstruction studies. Architectures are explored for a possible trigger primitive generation from which a two-step approach for a direct 3D clustering is proposed. The first step consists of finding the regions of interest (ROIs) in the detector and is based on a designed tracking algorithm (TA), which enables the identification of electromagnetic (EM) shower tracks and of a signal seed selection. Also, it is shown that more signal seeds can be selected when an EM shower parametrization is used in the TA.Finally, the TA is used in the machine learning study for the ROI generation procedure. It results in an image of the physical shower, and a neural network (NN) is applied to perform the data classification (EM-like or PU-like). We have compared several NN models and the performance (classification accuracy) is measured against the model complexity (the total number of model parameters). The best trade-off is obtained between the quality of the decision-making process and the requirements on the hardware processing power
Rose, A. W. "The level-1 Trigger of the CMS experiment the LHC and the Super-LHC." Thesis, Imperial College London, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.516181.
Full textGasperini, Simone. "Performance of the CMS barrel muon trigger algorithms for high luminosity LHC." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/17740/.
Full textMohlalisi, Seforo. "Implementation of a Custom Muon High Level Trigger Monitoring System." Master's thesis, University of Cape Town, 2010. http://hdl.handle.net/11427/6541.
Full textAggleton, Robin Cameron. "Searches for exotic Higgs bosons at CMS : from Level-1 jet trigger calibration to data analyses and their interpretation." Thesis, University of Southampton, 2016. https://eprints.soton.ac.uk/410358/.
Full textKünsken, Andreas Verfasser], Achim [Akademischer Betreuer] Stahl, and Christopher Henrik V. [Akademischer Betreuer] [Wiebusch. "Studies on the use of the CMS Outer Hadron Calorimeter in the Level-1 Muon Trigger / Andreas Künsken ; Achim Stahl, Christopher Wiebusch." Aachen : Universitätsbibliothek der RWTH Aachen, 2017. http://d-nb.info/116249848X/34.
Full textKünsken, Andreas [Verfasser], Achim Akademischer Betreuer] Stahl, and Christopher Henrik V. [Akademischer Betreuer] [Wiebusch. "Studies on the use of the CMS Outer Hadron Calorimeter in the Level-1 Muon Trigger / Andreas Künsken ; Achim Stahl, Christopher Wiebusch." Aachen : Universitätsbibliothek der RWTH Aachen, 2017. http://d-nb.info/116249848X/34.
Full textPaggi, Giulia. "Sviluppo di un algoritmo di trigger per la ricerca di particelle esotiche a lunga vita media a High Luminosity LHC con il rivelatore di muoni di CMS." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/21605/.
Full textOgul, Hasan. "Measurements of the differential cross section and charge asymmetry for inclusive pp→W(μν) production with 8 TeV CMS data and CMS single muon trigger efficiency study." Diss., University of Iowa, 2016. https://ir.uiowa.edu/etd/3152.
Full textAlt, Torsten [Verfasser], Volker [Gutachter] Lindenstruth, and Udo [Gutachter] Kebschull. "An FPGA-based preprocessor for the ALICE High-Level-Trigger / Torsten Alt ; Gutachter: Volker Lindenstruth, Udo Kebschull." Frankfurt am Main : Universitätsbibliothek Johann Christian Senckenberg, 2018. http://d-nb.info/1153572230/34.
Full textOliveira, Marcos Vinícius Silva. "The atlas level-1 muon topological trigger information for run 2 of the LHC." Universidade Federal de Juiz de Fora, 2015. https://repositorio.ufjf.br/jspui/handle/ufjf/881.
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CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
Experimentos modernos de física de altas energias têm demandando cada vez mais a utilização de técnicas avançadas de instrumentação eletrônica, devido principalmente ao grande número de sensores e a alta taxa de eventos gerados nesses experimentos, como é o caso do LHC (Large Hadron Collider), o maior e mais energético acelerador de partículas do mundo. Para a segunda tomada de dados do LHC, o sistema de primeiro nível de seleção on-line de eventos do ATLAS, um dos maiores detectores do LHC, irá adicionar informação de posição (informação topológica) dos sinais detectados pelo detector para aumentar a eficiência de seleção de eventos para variados processos de física, como o decaímento de hádron B em um par de múons de baixo momento e os decaímentos originados de processos de violação de sabor leptónico. Um dedicado Processador Topológico (L1Topo) foi desenvolvido para selecionar eventos baseados em sua topologia e fornecer o resultado para o CTP (Processador Central de Seleção de Eventos). Esta dissertação aborda o trabalho desenvolvido na atualização da Interface de Múon para o Processador Central de Seleção de Eventos (MUCTPI), que irá transmitir informação de posição de múons para o processador topológico através de saídas elétricas originalmente desenvolvidas para teste e monitoração. Portanto, um sistema de testes foi desenvolvido e resultados gerados pelo dispositivo demonstraram a viabilidade de atualização do sistema MUCTPI para que dados sejam enviados através de suas saídas elétricas com uma taxa de transmissão (320 MHz) 8 vezes maior que a taxa inicialmente prevista em projeto. Em seguida, são abordados os desenvolvimentos em FPGA do programa embarcado do sistema MUCTPI para a codificação de informação topológica de múon, bem como os desafios para o desenvolvimento de um sistema de baixa latência. Esta inclui ainda, simulações computacionais da operação do programa embarcado desenvolvido para o sistema MUCTPI, testes no equipamento através de interfaces de monitoração e testes de integração com o processador L1Topo, que demostraram a eficácia do desenvolvimento.
Modern high-energy physics experiments, such as those taking place at the LHC (Large Hadron Collider), require the use of advanced electronic instrumentation to cope with the high number of sensor channels operating at a high rate. During the first data taking run of the LHC, the proton-proton luminosity delivered to ATLAS and CMS, two of its four detectors, made possible the discovery of the Higgs boson. For the second LHC data-taking run, the first level trigger of ATLAS will use the geometry of particle tracks (topological information) aiming at the increase of the trigger efficiency of several physics processes, such as the B-hadrons decaying to two low-pT muons and lepton flavor violation decays. For this purpose, a dedicated Topological Processor (L1Topo) was developed to process topological algorithms and provide additional trigger inputs to the CTP (Central Trigger Processor), which is in charge of reducing the collision rate of 40 MHz to a Level-1 event rate of 75 kHz based on event information from the calorimeters and muon spectrometer. This dissertation presents the upgrade of the existing Muon-to-Central-Trigger- Processor Interface (MUCTPI) with the objective of transmitting muon topological information to L1Topo through electrical trigger outputs initially intended, solely, for testing and monitoring purposes. As a first step, an error-rate test system has been developed and its results have demonstrated the possibility of reliably transmitting data through the trigger outputs at 320 MHz, eight times the nominal transmission rate (40 MHz). In addition, here is presented the FPGA firmware developments for the MUCTPI to encode and transmit the muon topological information. Furthermore, this work includes computer simulations of the MUCTPI firmware operation, hardware tests using the debugging interface, and integration tests with L1Topo processor, which have demonstrated the functionality of the upgraded MUCTPI system.
Thäder, Jochen [Verfasser], Volker [Akademischer Betreuer] Lindenstruth, and Harald [Akademischer Betreuer] Appelshäuser. "Commissioning of the ALICE High-Level Trigger / Jochen Thäder. Gutachter: Harald Appelshäuser ; Volker Lindenstruth. Betreuer: Volker Lindenstruth ; Harald Appelshäuser." Frankfurt am Main : Univ.-Bibliothek Frankfurt am Main, 2012. http://d-nb.info/1044413034/34.
Full textBraun, Nils Lennart [Verfasser], and M. [Akademischer Betreuer] Feindt. "Combinatorial Kalman Filter and High Level Trigger Reconstruction for the Belle II Experiment / Nils Lennart Braun ; Betreuer: M. Feindt." Karlsruhe : KIT-Bibliothek, 2019. http://d-nb.info/1177147122/34.
Full textBecker, Bruce. "Development of a high-level trigger for the dimuon spectrometer of the ALICE experiment at the large hadron collider." Doctoral thesis, University of Cape Town, 2006. http://hdl.handle.net/11427/6525.
Full textThe ALICE experiment at CERN's Large Hadronic Collider will mark the beginning of a new phase in the study of ultra-relativistic heavy ion-collisions. It will be possible to explore in great detail phenomena discovered or hinted at in the course of experiments at the Relativistic Heavy Ion Collider, in particular the signals of the quark-gluon plasma. One of the most promising signals of the creation of this new state of matter is the anomalous suppression of the Υ (bb) and J/v(cc) families. One of the main decay channels of these mesons is into dimuons and ALICE has a dedicated dimuon spectrometer in order to study the spectra of these interesting particles. The signal is, however, swamped by a large background from several other muonic sources. Due to the large data rate expected for ALICE and the limited bandwidth, a highly efficient and selective trigger is required for the experiment - the dimuon high-level trigger (dHLT). This thesis concerns the context, development and implementation of the ALICE dimuon high-level trigger. The physics context ot the experimentation is described, as well as the technical requirements of the system. The performance of the prototype is investigated with the use of Monte-Carlo simulations. An investigation into the performance estimates of system in the expected physics environment was performed, which validated the benchmarks, as well as investigation of the effect of possible modifications of quarkonia yields due to QGP formation on the response of the dHLT.
Delaere, Christophe. "Study of WW decay of a Higgs boson with the ALEPH and CMS detectors." Université catholique de Louvain, 2005. http://edoc.bib.ucl.ac.be:81/ETD-db/collection/available/BelnUcetd-06022006-185157/.
Full textMcFall, Jason Derek. "The performance of the ZEUS first level tracking trigger and a study of diffractive D* production in deep inelastic scattering at HERA." Thesis, University of Oxford, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364105.
Full textGeorge, Simon. "Design of the SDC second level silicon tracking trigger : storage of strange meson production in Deep Inelastic Scattering with ZEUS detector at HERA." Thesis, University of Bristol, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.294961.
Full textAli, Babar. "Study of the performance of the Level-1 track trigger in the H→ττ→ee channel in ATLAS at high luminosity LHC." Thesis, Uppsala universitet, Högenergifysik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-208333.
Full textHadley, David Richard. "Search for a High Mass Higgs Boson in the Channel H - ZZ - llbb and digital filtering for the ATLAS level-1 calorimeter trigger." Thesis, University of Birmingham, 2011. http://etheses.bham.ac.uk//id/eprint/2975/.
Full textBeaupère, Nicolas. "Etude du système de déclenchement électronique pour le projet HL-LHC et recherche de nouvelle physique dans le spectre de masse invariante top anti-top au sein de l'expérience CMS du LHC." Phd thesis, Université Claude Bernard - Lyon I, 2012. http://tel.archives-ouvertes.fr/tel-00745211.
Full textSchmitt, Sebastian [Verfasser], and André [Akademischer Betreuer] Schöning. "Measurement of the Inclusive pp->Z/gamma*->e+e- Cross Section at sqrt(s) = 7 TeV with the ATLAS Experiment and Design Studies for a First Level Track Trigger for the ATLAS Trigger Upgrade at the future High Luminosity LHC / Sebastian Schmitt ; Betreuer: André Schöning." Heidelberg : Universitätsbibliothek Heidelberg, 2013. http://d-nb.info/1177382881/34.
Full textRamalho, Lucas Arruda. "An FPGA based 3.8 Tbps Data Sourcing and Emulator System." Universidade Estadual Paulista (UNESP), 2018. http://hdl.handle.net/11449/153037.
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A evolução dos Multi Gigabit Transceivers (MGT) nos Field Programmable Gate Arrays (FPGA) trouxeram oportunidades para o desenvolvimento de sistemas de aquisição e formatadores de dados em diversas áreas. As novas famílias de FPGAs são capazes de lidar com canais de transmissão com velocidade da ordem de Gbps que utilizam protocolos seriais de alta velocidade, podendo assim se tornar o futuro dos processadores downstream ou upstream. Os sistemas digitais criados para esse propósito, precisam ser confiáveis e síncronos entre dezenas de canais e placas. Como forma de permitir o teste de projetos com essa taxa massiva de bits, essa tese descreve o desenvolvimento do Data Sourcing System (DSS). Esse sistema deve ser capaz de testar qualquer application upstream ou downstream, permitir controle e acesso remoto aos sinais internos dos FPGAs, medir sincronismo e latência entre MGTs e avaliar integridade de links através de bit error rate (BER). Este trabalho faz parte de uma colaboração internacional liderada pelo Fermilab que propôs, com a contribuição do sistema descrito nesta tese, um sistema de trigger de nível 1 para o Compact Muon Solenoid (CMS) Outer Tracker. O dectetor CMS é um experimento vinculado ao European Organization for Nuclear Research (CERN). O DSS foi implementado sobre a placa Pulsar 2b, uma placa padrão Advanced Telecommunication Computing Architecture (ATCA), desenvolvida pelo Fermilab, que conta com um dispositivo FPGA para programação e costumização de aplicações. O setup de hardware utilizado foi construído sobre dois bastidores ATCA com 12 placas Pulsares 2b em cada. A taxa de dados máxima atingida foi de 3.84 Tbps entre os dois bastidores ATCAs. O DSS está operacional e foi utilizado para emular o fluxo de dados de saída do CMS Silicon Outer Tracker, e auxiliar na demonstração da proposta trigger de nível 1. Esta tese descreve essa demonstração como estudo de caso, que testa o formatador de dados do trigger (downstream) através do DSS e- mulando a saída de dados do detector. Nesse estudo de caso, tanto o DSS e o trigger proposto foram implementados utilizando o mesmo hardware ATCA e a Pulsar 2b. O foco do estudo de caso é descrever a comunicação entre o Data Sourcing shelf e o Pattern Recognition shelf. O DSS atendeu aos requisitos da demonstração provendo uma interface de usuário que permite aos desenvolvedores de trigger inserir sinais de controle e executar operações de leitura e escrita de forma remota nos FPGAs.
The evolution of Fiel Programmable Gate Array (FPGA) Multi Gigabit Transceivers (MGT) brought opportunities for data formatter and data acquisition projects in several areas. The newer FPGA families are capable of handling Gigabits per second (Gbps) I/Os implemented using high speed serial link protocols and to become the future downstream processors. The digital systems created for that purpose need to be reliable and synchronous between dozens of channels and boards. To allow the test of such massive bitrate projects, this work implemented the Data Sourcing System (DSS) e- mulator that is able to produce synchronized data in 12 boards, 480 channels, delivering up to 8 Gbps for each of them. This work is part of a international collaboration, led by Fermilab, that proposed with the contribuition of the system described in this thesis, a Level 1 (L1) tri- gger for the Compact Muon Solenoid (CMS) Outer Tracker. The CMS detector is an European Organization for Nuclear Research (CERN) experiment. The DSS is based on the Pulsar 2b, a custom Advanced Telecommunication Computing Architecture (ATCA) standard FPGA-based board designed by Fermilab to be a scalable high speed link processor system. This hardware setup was implemented at Fermilab using two interconnected ATCA shelves with 12 Pulsar 2b on both. The results show that the system is able to provide data at 3.8 Terabits per second (Tbps), and to measure synchronization, latency and bit error rate of the MGTs. The system is operational and was already used to emulate the CMS Silicon Tracker data, and helped the demonstration of a L1 Trigger approach. This thesis describes the demonstration performed as case of study, which used the DSS as upstream system and tested the trigger data delivery as a downstream. In the case of study, both DSS and the proposed trigger are performed by the same ATCA hardware and the Pulsar 2b. The case of study focused to describe the communication between the Data Sourcing shelf and the Pattern Recognition shelf. Data Sourcing reached those requirements for the demonstration and provided a user interface that allows the trigger developers to insert control signals or to perform W/R operations inside Pulsar 2b FPGA block memories.
Pawloski, Gregory J. "Testing of the muon port card and related electronics for the CMS endcap muon trigger system." Thesis, 2004. http://hdl.handle.net/1911/17720.
Full textDeMello, Martin J. "Study and implementation of a high-level trigger for the STAR experiment." Thesis, 2002. http://hdl.handle.net/1911/17500.
Full textTaylor, Ryan Paul. "Masking problematic channels in the liquid argon calorimeter for the high-level trigger of ATLAS." Thesis, 2009. http://hdl.handle.net/1828/1428.
Full textAlbrecht, Johannes [Verfasser]. "Fast track reconstruction for the high level trigger of the LHCb experiment / presented by Johannes Albrecht." 2009. http://d-nb.info/995788901/34.
Full textChiu, Justin. "The performance of the ATLAS missing transverse momentum high-level trigger in 2015 pp collisions at 13 TeV." Thesis, 2016. http://hdl.handle.net/1828/7535.
Full textGraduate
0798,
jchiu@uvic.ca