Sökning: "trapped particles"

Visar resultat 1 - 5 av 52 avhandlingar innehållade orden trapped particles.

  1. 1. Studies of triggering and exotic particle searches at ATLAS, and a search for trapped monopoles

    Författare :Katarina Bendtz; David Milstead; Chad Finley; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Magnetic monopoles; ATLAS; SQUID; trigger; exotic particles; heavy long-lived particles; High Energy Physics; högenergifysik;

    Sammanfattning : The ATLAS detector at the LHC operated through 2011 and 2012 with 7 and 8 TeV centre-of-mass energy of its colliding proton bunches, respectively. One if its main objectives is to search for physics beyond the Standard Model. LÄS MER

  3. 2. Studies of cosmic rays with the anticoincidence system of the PAMELA satellite experiment

    Författare :Silvio Orsi; Mark Pearce; Martin Pohl; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; astrophysics; astroparticle physics; antimatter; organic scintillators; cosmic rays; trapped particles; Astroparticle physics; Astropartikelfysik;

    Sammanfattning : PAMELA is a satellite-borne experiment designed to study the charged component of the cosmic radiation of galactic, solar and trapped nature. The main scientific objective is the study of the antimatter component of cosmic rays over a wide range of energies (antiprotons: 80 MeV–190 GeV, positrons: 50 MeV–270 GeV). LÄS MER

  4. 3. Plasmonics with a Twist: from Single Particles to Metasurfaces

    Författare :Robin Ogier; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; colloidal lithography; localized surface plasmons; circularly polarized light; metsurfaces; nanofabrication; chirality; optical trapping;

    Sammanfattning : Nanophotonics deals with how electromagnetic fields can be confined and squeezed to orders of dimensions below the light wavelength. Plasmonics, one of the fields of nanophotonics, study collective free electron oscillations driven by light in metallic nanostructures and interfaces. LÄS MER

  5. 4. Nanofluidic Scattering Microscopy for Single Particle Catalysis

    Författare :Björn Altenburger; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; label-free methods; Platinum; Nanofluidics; Single nanoparticle catalysis; Particle trapping; Hydrogen Peroxide decomposition; Colloidal particles; Dark field microscopy;

    Sammanfattning : Heterogeneous catalysis concerns material formulations – catalysts – that can assist a chemical reaction by improving its rate or selectivity, by lowering activation barriers and altering the energy landscape. The core of catalysts are often tiny metal particles that provide a large reaction surface at a small volume, as well as low coordination sites whose type and abundance depends on particle size and shape. LÄS MER

  7. 5. Modelling and measuring transport in fusion plasmas

    Författare :Istvan Pusztai; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; fusion plasmas; ITG stability; microinstabilities; de-convolution; Lorentz operator; gyrokinetic equation; transport; quasilinear flux; beam emission spectroscopy; ion temperature gradient mode; electron density measurement; trapped electron response;

    Sammanfattning : In the present thesis we consider theoretical and experimental aspects of the turbulent transport which is a crucial issue in fusion plasma physics.Experimental observations and gyrokinetic simulations show that collisions strongly influence the turbulent flux of particles. LÄS MER