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Visar resultat 11 - 15 av 75 avhandlingar som matchar ovanstående sökkriterier.

  1. 11. ALPACA - A kinetic theory Monte Carlo event generator for heavy ion collisions

    Författare :Robin Törnkvist; Partikel- och kärnfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; ALPACA; QCD effective kinetic theory; event generators; heavy-ion physics; Proton-proton collisions; small system collectivity; phenomemology;

    Sammanfattning : Recent measurements of collective effect-like signals in small collision systems has highlighted the need for new models to explain these phenomena. One good candidate for such a model is the AMY QCD effective kinetic theory, which is valid for systems in- and out-of-equilibrium. LÄS MER

  3. 12. Investigations on Emission Sources in Proton-Nucleus and Nucleus-Nucleus Collisions

    Författare :Johan Mårtensson; Partikel- och kärnfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; High energy interactions; Fysik; Physics; correlation function.; fermion interferometry; t p and d p ratios; target mass dependence; pion angular distribution; pion excitation function; Heavy ion reactions; intermediate energy; cosmic rays; Kosmisk strålning; högenergi;

    Sammanfattning : Emission sources in proton-nucleus and nucleus-nucleus collisions at intermediate energies have been studied. Pion excitation functions from the absolute threshold to 500 MeV have been measured with an ion beam of continuously varying energy with an energy resolution of 1 MeV. LÄS MER

  4. 13. Studies of Heavy Ion Induced Desorption in the Energy Range 5-100 MeV/u

    Författare :Emma Hedlund; Lars Westerberg; Oleg Malyshev; Manfred Leisch; Uppsala universitet; []
    Nyckelord :Physics; Heavy Ion Induced Desorption; Ultra High Vacuum; NEG Coating; Heavy Ion Accelerators; Test Particle Monte-Carlo; Gas Flow; Throughput; Laser Refractometry; Metrology; Fysik;

    Sammanfattning : During operation of heavy ion accelerators a significant pressure rise has been observed when the intensity of the high energy beam was increased. The cause for this pressure rise is ion induced desorption, which is the result when beam ions collide with residual gas molecules in the accelerator, whereby they undergo charge exchange. LÄS MER

  5. 14. Heavy-ion transport codes for radiotherapy and radioprotection in space

    Författare :Davide Mancusi; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; charge-changing cross sections; transport codes; radiotherapy; Monte-Carlo codes; heavy ions; radioprotection in space;

    Sammanfattning : Simulation of the transport of heavy ions in matter is a field of nuclear science that has recently received attention in view of its importance for some relevant applications. Accelerated heavy ions can, for example, be used to treat cancers (heavy-ion radiotherapy) and show some superior qualities with respect to more conventional treatment systems, like photons (x-rays) or protons. LÄS MER

  7. 15. Developing the Angantyr model and extending colour reconnection for heavy-ion collisions in Pythia

    Författare :Harsh Shah; Partikel- och kärnfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; heavy-ion collisions; hadronization; QCD Phenomenology; Colour Reconnection; Fysicumarkivet A:2023:Shah;

    Sammanfattning : This thesis is composed of four papers, the first two show the attempts made to extend the Pythia event generator to simulate heavy-ion collision events. The other two papers show methods to improve the hadronization mechanism in the Pythia model for a bettter agreement with the experimental data of pp and heavy-ion collisions. LÄS MER