Sökning: "ion loss rates"

Hittade 4 avhandlingar innehållade orden ion loss rates.

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

    Författare :Mika Holmberg; Jan-Erik Wahlund; Nikolai Piskunov; Svetlana Ratynskaia; Thomas Cravens; Uppsala universitet; []
    Nyckelord :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;

    Sammanfattning : 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. LÄS MER

  3. 2. Ion escape from Mars : measurements in the present to understand the past

    Författare :Robin Ramstad; Stas Barabash; Yoshifumi Futaana; David Brain; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Mars; escape; solar wind; evolution; CME; coupling; plasma; atmosphere; Space Physics; rymdfysik;

    Sammanfattning : Present-day Mars is a cold and dry planet with a thin CO2-dominated atmosphere comprising only a few ­­­mbar pressure at low altitudes. However, the Martian surface is marked with valley networks, hydrated mineral clays, carbonates and the remains of deltas and meandering rivers, i.e. LÄS MER

  4. 3. Escape to space or return to venus : ion flows measured by venus express

    Författare :Moa Persson; Yoshifumi Futaana; Hans Nilsson; Maria Hamrin; Dmitrij Titov; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Venus; water; escape; planetary physics; oxygen; O ; hydrogen; H ; ions; space physics; space plasma physics; Venus Express; ASPERA-4; IMA; spacecraft measurements; rymd- och plasmafysik; Space and Plasma Physics;

    Sammanfattning : The present-day Venusian atmosphere is crushingly dense, extremely hot and arid. Yet, in its early history, Venus presumably had a massive amount of water, which, if spread evenly over the surface, provided a water depth of 10s to 100s of meters. Therefore, over the course of the atmospheric evolution, the water must have been removed from Venus. LÄS MER

  5. 4. Mesoporous Materials for Fast Charging Electrochemical Energy Storage

    Författare :Giulio Calcagno; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; electrochemical energy storage; redox-active electrolytes; mesoporous carbon; hybrid supercapacitors; fast charging storage; ordered mesoporous materials; mesoporous titanium dioxide; lithium-ion battery;

    Sammanfattning : High performing electrochemical energy storage (EES) devices are needed to cope with the increasing energy requirements of modern society. Electrode materials must store lots of energy, charge/discharge fast and be environmentally friendly. LÄS MER