Search for dissertations about: "magnetospheres"

Found 5 swedish dissertations containing the word magnetospheres.

  1. 1. Magnetic Reconnection in Space Plasmas Cluster Spacecraft Observations

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Alessandro Retinò; Uppsala universitet.; [2007]
    Keywords : Space and plasma physics; space physics; plasma astrophysics; plasma physics; transport processes; boundary layers; magnetic reconnection; turbulence; particle acceleration; solar system; magnetospheres; Rymd- och plasmafysik;

    Abstract : Magnetic reconnection is a universal process occurring at boundaries between magnetized plasmas, where changes in the topology of the magnetic field lead to the transport of charged particles across the boundaries and to the conversion of electromagnetic energy into kinetic and thermal energy of the particles. Reconnection occurs in laboratory plasmas, in solar system plasmas and it is considered to play a key role in many other space environments such as magnetized stars and accretion disks around stars and planets under formation. READ MORE

  2. 2. A study of the structure and dynamics of Saturn's inner plasma disk

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Mika Holmberg; Jan-Erik Wahlund; Nikolai Piskunov; Svetlana Ratynskaia; Thomas Cravens; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Planetary magnetospheres; Saturn; magnetospheric dynamics; Saturn s inner plasma disk; ring plasma; ion densities; ion velocities; dayside nightside asymmetry; ion loss rates; Cassini; Langmuir probe; RPWS; Space Physics; Rymdfysik;

    Abstract : This thesis presents a study of the inner plasma disk of Saturn. The results are derived from measurements by the instruments on board the Cassini spacecraft, mainly the Cassini Langmuir probe (LP), which has been in orbit around Saturn since 2004. READ MORE

  3. 3. New Perspectives on Solar Wind-Magnetosphere Coupling

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Torbjörn Sundberg; Lars Blomberg; Judy Cumnock; Masaki Fujimoto; [2011]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; magnetosphere; ionosphere; mercury; kelvin-helmholtz; TECHNOLOGY Electrical engineering; electronics and photonics Electrophysics; TEKNIKVETENSKAP Elektroteknik; elektronik och fotonik Elektrofysik;

    Abstract : The streaming plasma in the solar wind is a never ending source of energy, plasma, and momentum for planetary magnetospheres, and it continuously drives large-scale plasma convection systems in our magnetosphere and over our polar ionosphere. This coupling between the solar wind and the magnetosphere is primarily explained by two different processes: magnetic reconnection at high latitudes, which interconnects the interplanetary magnetic field (IMF) with the planetary dipole field, and low-latitude dynamos such as viscous interaction, where the streaming plasma in the solar wind may trigger waves and instabilities at the flanks of the magnetosphere, and thereby allow solar wind plasma to enter into the system. READ MORE

  4. 4. Electron-scale physics in space plasma Thin boundaries and magnetic reconnection

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Cecilia Norgren; Mats André; Jonathan Eastwood; [2016]

    Abstract : Most of the observable Universe consists of plasma, a kind of ionized gas that interacts with electric and magnetic fields. Large volumes of space are filled with relatively uniform plasmas that convect with the magnetic field. READ MORE

  5. 5. Energy Transfer and Conversion in the Magnetosphere-Ionosphere System

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Lisa Rosenqvist; Stephan Buchert; Andris Vaivads; Mike Lockwood; [2008]
    Keywords : Space and plasma physics; solar system; space physics; magnetospheric physics; plasma physics; magnetic storms; substorms; boundary layers; magnetic reconnection; energy conversion; space weather; Rymd- och plasmafysik;

    Abstract : Magnetized planets, such as Earth, are strongly influenced by the solar wind. The Sun is very dynamic, releasing varying amounts of energy, resulting in a fluctuating energy and momentum exchange between the solar wind and planetary magnetospheres. READ MORE