Sökning: "bow shock"

Visar resultat 1 - 5 av 8 avhandlingar innehållade orden bow shock.

  1. 1. High-speed jets and related phenomena at Earth's bow shock and magnetosheath

    Författare :Savvas Raptis; Tomas Karlsson; Drew Turner; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; magnetosheath; solar wind; bow shock; plasma; collisionless shock; Physics; Fysik;

    Sammanfattning : Magnetosheath high-speed jets are transient and localized dynamic pressure enhancements downstream of Earth’s bow shock. Their formation has been associated with several mechanisms, including solar transient events and the dynamical evolution of the bow shock. LÄS MER

  3. 2. Electron Heating and Acceleration at Earth’s Collisionless Bow Shock

    Författare :Martin Lindberg; Andris Vaivads; Philippe Savoini; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Electron; heating; Acceleration; MMS; Shock; space; plasma; Electrical Engineering; Elektro- och systemteknik;

    Sammanfattning : Cosmic rays are ultra-relativistic particles traveling near the speed of light permeating the galaxy. Collisionless shock waves with their ubiquity throughout the universe and excellent capability of accelerating charged particles offer an explanation to the origin of cosmic rays. LÄS MER

  4. 3. Dissipation at the Earth's Quasi-Parallel Bow Shock

    Författare :Rico Behlke; Mats André; Harald Kucharek; Andris Vaivads; Manfred Scholer; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Space and plasma physics; collisionless shocks; wave-particle interactions; nonlinear phenomena; cross-shock potential; Cluster spacecraft; Rymd- och plasmafysik; Space physics; Rymdfysik;

    Sammanfattning : The Earth's bow shock is a boundary where the solar wind becomes decelerated from supersonic to subsonic speed before being deflected around the Earth. This thesis presents measurements by the Cluster spacecraft upstream and at the Earth's quasi-parallel bow shock where the angle between the upstream magnetic field and the bow shock normal is less than 45 degrees. LÄS MER

  5. 4. Observations by the Cluster satelites at the Earth´s quasi-parallel bow shock

    Författare :Rico Behlke; Uppsala universitet; []
    Nyckelord :;

    Sammanfattning : .... LÄS MER

  7. 5. Ion dynamics and structure of collisionless shocks in space

    Författare :Andreas Johlander; Andris Vaivads; Robert F. Wimmer-Schweingruber; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Fysik med inriktning mot rymd- och plasmafysik; Physics with specialization in Space and Plasma Physics;

    Sammanfattning : Shock waves form when supersonic flows encounter an obstacle. Like in regular gases, shock waves can form in a plasma - a gas of electrically charged particles. Shock waves in plasmas where collisions between particles are very rare are referred to as collisionless shock waves. LÄS MER