Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 43 for “"High luminosity"”.
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Design Of A High Luminosity 100 Tev Proton Antiproton Collider
… surpasses this energy scale. A 10 34 cm-2 s-1 luminosity 100 TeV proton-antiproton collider is explored with 7× the energy of the LHC. The dipoles are 4.5 T to reduce cost. A proton-antiproton collider is selected as a future machine for several reasons. The cross section for many high mass …
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Designing the four rod crab cavity for the high-luminosity LHC upgrade
… were performed to ensure that multipacting and higher order modes were at tolerable levels. Design considerations were made to ensure a niobium prototype could be constructed for cold testing, the results of which are presented along with discussion of future plans for continuing to further the …
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Deep Learning for online tagging of proton-proton collisions at the High-Luminosity LHC
The Large Hadron Collider is a key facility in high-energy physics and one of the most prominent producers of big data. However, storing all this data is unfeasible; thus, a significant portion is filtered out using a trigger system. The upcoming High Luminosity upgrade is expected to increase data …
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Innovative silicon pixel sensors for a 4D VErtex LOcator detector for the LHCb high luminosity upgrade
To fully exploit the instantaneous luminosity that LHC could provide at interaction point 8, where the LHCb experiment is located, a second experiment upgrade, called upgrade II, is planned to take place during Long Shutdown 4 in 2033. In order for the experiment to improve or at least maintain the …
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Development of a new silicon pixel detector with 10 ps time resolution for high luminosity future experiments
… detector for the Upgrade II, planned to face the high luminosity conditions. These requirements are a time resolution better than 50 ps per hit, a spatial resolution of the order of 10–20 μm and a radiation hardness up to 6·10^16 1 MeV n_eq/cm^2. In this thesis the characterizations performed both …
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Unification of QSOs via black hole and accretion properties
… differences of the underlying engine, such as luminosity, black hole mass (MBH) and Eddington ratio (L/LEdd), are crucial to our understanding of QSO central engines. Broad Absorption Line (BAL) QSOs are a particularly interesting type of QSO that exhibits both orientation and intrinsic …
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Novel techniques for sub-nanosecond time-resolved Ring Image Cherenkov photon detection
The High-Luminosity LHC upgrade brings with it a significant increase in detector occupancy that presents a challenge to the LHCb detector. The Ring-Imaging Cherenkov (RICH) detectors are an integral component in LHCb particle identification that will see a degradation in performance under high …
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Effective Field Theories for Physics Beyond the Standard Model
… By comparing with previous fits, we will highlight the increase in sensitivity to the SMEFT provided by new data from Run II of the LHC. We will assess the impact of our fit on UV completions of the SMEFT by considering simple single-field extensions of the Standard Model, matched to the …
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Higgs pair production in [beta][beta][tau][tau] final states at the HL-LHC
… in [beta][beta][tau][tau] final states at the High Luminosity LHC is investigated. Higgs pair production can be used to measure the Higgs trilinear coupling constant, which uniquely determines the shape of the Higgs potential. The doubly hadronic, hadron-muon, and hadron-electron di-[tau] final …
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Crabbing System for an Electron-Ion Collider
<p>As high energy and nuclear physicists continue to push further the boundaries of knowledge using colliders, there is an imperative need, not only to increase the colliding beams’ energies, but also to improve the accuracy of the experiments, and to collect a large quantity of events with good …
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Micron precision calibration methods for alignment sensors in particle accelerators
… as they are crucial for collisions with high luminosity in the experiments. The systems used are hydrostatic levelling systems, wire position systems and invarradial systems. The sensors have to withstand a highly radioactive environment,strong magnetic fields and cannot be returned for …
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Development of 3D Silicon radiation detectors for neutrons and high energy charged particles
… have been pursued. These devices feature high aspect-ratio cavities, filled with neutron converter materials, so as to improve the neutron detection efficiency with respect to coated planar sensors. In the framework of the INFN HYDE (HYbrid Detectors for neutrons) project, we have designed …
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Search for dark matter produced in association with a Higgs boson decaying to two photons in proton-proton collisions at 13 TeV with the CMS detector
… The analyzed data correspond to an integrated luminosity of 2.2/fb and 35.9/fb, respectively. No significant excess over the standard model background expectation is observed. The results are used to constrain at the 95% confidence level dark matter production cross section in the context of …
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Blind and pointed Sunyaev-Zel'dovich observations with the Arcminute Microkelvin Imager
… I conduct pointed observations towards a high luminosity subsample of eight clusters from the Local Cluster Substructure Survey (LoCuSS). For each of these I provide probability distributions of parameters such as mass, radius, and temperature. I compare my results to those in the …
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Development of Small-Pitch, Thin 3D Sensors for Pixel Detector Upgrades at HL-LHC
… depletion voltage requirement, inter-columnar high electric field distribution, lower trapping probability, faster charge collection capability, lower power dissipation, and lower inter-pitch charge sharing. Since several years, FBK has developed 3D sensors with a double-sided technology, that …
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First search for electroweak supersymmetry in final states with hadronic decays of WW, WZ, or WH boson pair and missing transverse momentum.
… experiment at the LHC with a total integrated luminosity of 137 fb−1 . The targeted final states include a pair of bosons (WW, WZ, or WH) with large missing transverse momentum arising from the lightest neutralinos (χe 0 1 ). Deep neural network large-radius jet taggers are used to identify …
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The DarkLight experiment : searching for the dark photon
… but invisibly and might be discoverable in high luminosity collider experiments. Following a proposed setup by Wojtsekhowski et al. to use the VEPP-3 electron-positron storage ring at the Budker Institute for Nuclear Physics, we study whether an e+ + e- - A'+ -[gamma] signal could be seen …
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Neural-Network Based b-Tagging in the CMS Level 1 Trigger System
… the Compact Muon Solenoid (CMS) detector for the High Luminosity Large Hadron Collider will greatly expand the hardware capabilities of the Level 1 Trigger (L1T) system. With the advent of tracks in the L1T, these upgrades bring the idea of b jet identification within the L1T environment into the …
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The radiation mechanism of fast radio bursts
… which is investigated in this thesis. The high brightness temperatures (≳ 10³⁵ K) of FRBs mean that the emission process must be coherent. Two general classes of coherent radiation mechanisms are considered - maser and the antenna mechanism. We use the observed properties of the repeater …
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