Blar i Department of Physics and Technology på tittel
Viser treff 1516-1535 av 2282
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Performance of the High Level Trigger gamma-conversion reconstruction chain in the ALICE central tracking detectors
(Master thesis, 2011-06-01)Photons are produced through various processes in the particle and nuclei collisions at the LHC, and pose as useful probes of the formation of a Qaurk-Gluon Plasma. The probability of a photon converting within the central ... -
Performance of the missing transverse momentum triggers for the ATLAS detector during Run-2 data taking
(Journal article; Peer reviewed, 2020)The factor of four increase in the LHC luminosity, from 0.5 × 10^34 cm^−2 s^−1 to 2.0 × 10^34cm^−2 s^−1, and the corresponding increase in pile-up collisions during the 2015–2018 data-taking period, presented a challenge ... -
Performance of the upgraded PreProcessor of the ATLAS level-1 calorimeter trigger
(Journal article; Peer reviewed, 2020-11)The PreProcessor of the ATLAS Level-1 Calorimeter Trigger prepares the analogue trigger signals sent from the ATLAS calorimeters by digitising, synchronising, and calibrating them to reconstruct transverse energy deposits, ... -
Performance of top-quark and WW-boson tagging with ATLAS in Run 2 of the LHC
(Peer reviewed; Journal article, 2019-04-30)The performance of identification algorithms (“taggers”) for hadronically decaying top quarks and W bosons in pp collisions at s√ = 13 TeV recorded by the ATLAS experiment at the Large Hadron Collider is presented. A set ... -
Performance study of the J/psi reconstruction after the ALICE LS2 upgrade
(Master thesis, 2023-06-01) -
Periodic shock-emission from acoustically driven cavitation clouds: a source of the subharmonic signal
(Peer reviewed; Journal article, 2014-12)Single clouds of cavitation bubbles, driven by 254 kHz focused ultrasound at pressure amplitudes in the range of 0.48–1.22 MPa, have been observed via high-speed shadowgraphic imaging at 1 × 10⁶ frames per second. Clouds ... -
Permittivity measurements using dual open ended coaxial probes
(Master thesis, 2012-11-19)The motivation for this study has been to conduct a feasibility study on a measuring device to monitor hydrate formation close to the inner surface of a pipe where a multiphase hydrocarbon fluid mixture is flowing. This ... -
Perspectives on weak interactions in complex materials at different length scales
(Journal article; Peer reviewed, 2022)Nanocomposite materials consist of nanometer-sized quantum objects such as atoms, molecules, voids or nanoparticles embedded in a host material. These quantum objects can be exploited as a super-structure, which can be ... -
Petrophysical characterization in paleokarst and effect on reservoir properties
(Master thesis, 2012-06-29)Karst is a geological process that can enhance porosity and permeability within a carbonate succession, thus affecting the heterogeneity producing a substantial effect on the fluid flow. The subject is not widely explored ... -
Phase Field Theory Modeling of CH4 and CO2 Fluxes from Exposed Natural Gas Hydrate Reserviors
(Master thesis, 2009-10-01)Natural gas hydrates are widely distributed in sediments along continental margins, and harbor enormous amounts of energy. Gas hydrates are crystalline solids which occur when water molecules form a cage like structure ... -
Phase field theory modeling of CH4/CO2 gas hydrates in gravity fields
(Peer reviewed; Journal article, 2011)Natural gas hydrates in reservoirs are thermodynamically unstable due to the interactions with surrounding fluids (aqueous, gas) and mineral surfaces. Depending on the local flow hydrate will dissociate as well as reform. ... -
Phase transitions in non-equilibrium dynamical systems
(Doctoral thesis, 2010-12-09)This work is a summary of three papers (references [5, 14, 24]), which deal with modelling the hadronization and freeze-out in heavy ion collisions. There is evidence that this is a non-equilibrium process, and therefore ... -
\(\phi\) meson production in Pb-Pb collisions at \(\sqrt s_{NN}\)=5.02 TeV with ALICE at the LHC
(Peer reviewed; Journal article, 2017-11)Strangeness production is a key tool to understand the properties of the medium formed in heavy-ion collisions: an enhanced production of strange particles was early proposed as one of the signatures of the Quark-Gluon ... -
\(\phi\)-meson production at forward rapidity in p-Pb collisions at \(\sqrt{s_{\rm NN}}\) = 5.02 TeV and in pp collisions at \(\sqrt{s}\) = 2.76 TeV
(Peer reviewed; Journal article, 2017-03)The first measurement of \(\phi\).meson production in p-Pb collisions at a nucleon-nucleon centre-of-mass energy \(\sqrt{s_{\rm NN}}\) = 5.02 TeV has been performed with the ALICE apparatus at the LHC. \(\phi\) mesons have ... -
Phonon-Mediated Quasiparticle Lifetime Renormalizations in Few-Layer Hexagonal Boron Nitride
(Journal article; Peer reviewed, 2023)Understanding the collective behavior of the quasiparticles in solid-state systems underpins the field of non-volatile electronics, including the opportunity to control many-body effects for well-desired physical phenomena ... -
Photon, neutrino and charged particle spectra from R-violating gravitino decays
(Peer reviewed; Journal article, 2010-03-22)We study photonic, neutrino and charged particle signatures from slow decays of gravitino dark matter in supersymmetric theories where R-parity is explicitly broken by trilinear operators. Photons and (anti-)fermions from ... -
Photoproduction of heavy vector mesons in ultra-peripheral Pb–Pb collisions
(Peer reviewed; Journal article, 2017-11)Ultra-peripheral Pb-Pb collisions, in which the two nuclei pass close to each other, but at an impact parameter greater than the sum of their radii, provide information about the initial state of nuclei. In particular, ... -
Photoproduction of ρ0 and Two–photon Production of Lepton Pairs in Ultra–peripheral Pb–Pb Collisions at the CERN LHC
(Doctoral thesis, 2014-06-10)This thesis is based on the analysis of ultra–peripheral collisions collected by the ALICE Collaboration at the CERN LHC. ALICE is a general purpose detector designed to study heavy-ion collisions at ultra–relativistic ... -
Photothermal convection of a magnetic nanofluid in a direct absorption solar collector
(Journal article; Peer reviewed, 2022)Nanofluid-based direct absorption of solar heat results in thermal efficiencies superior to conventional solar thermal technology. In addition, convection of nanofluid can be sustained pump-free in the collector. In this ...