Sökning: "Plasmafysik"

Visar resultat 31 - 35 av 96 avhandlingar innehållade ordet Plasmafysik.

1. 31. Structures and Processes at the Mercury Magnetopause

   Författare :Elisabet Liljeblad; Tomas Karlsson; Ferdinand Plaschke; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : The mechanism involved in the transfer of energy, momentum and plasma from the solar wind to any planetary magnetosphere is considered one of the more important topics in space plasma physics. With the use of the Mercury spacecraft MESSENGER’s (MErcury Surface, Space ENvironment, GEochemistry, and Ranging) data, it has been possible to study these processes in an environment different, yet similar, to Earth’s. LÄS MER

3. 32. Structures and processes in the Mercury magnetosphere

   Författare :Elisabet Liljeblad; Tomas Karlsson; Anita Kullen; Haje Korth; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Mercury; MESSENGER; magnetosphere; processes; structures; Electrical Engineering; Elektro- och systemteknik;

   Sammanfattning : The mechanisms involved in the transfer of mass and energy from the solar wind to any planetary magnetosphere is considered an important topic in space physics. With the use of the Mercury spacecraft MESSENGER's data, it has been possible to study these processes in an environment different, yet similar, to Earth's. LÄS MER

4. 33. 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

5. 34. Design and Experiments with High Power Microwave Sources : The Virtual Cathode Oscillator

   Författare :Cecilia Möller; Nils Brenning; Stefan Silfverskiöld; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; High Power Microwaves Vircator;

   Sammanfattning : High-Power Microwaves (HPM) can be used to intentionally disturb or destroy electronic equipment at a distance by inducing high voltages and currents.This thesis presents results from simulations and experiments with a narrow band HPM source, the vircator. LÄS MER

7. 35. Object-plasma interaction in the vicinity of Enceladus

   Författare :Jonas Olson; Svetlana Ratynskaia; Padma Shukla; KTH; []
   Nyckelord :;

   Sammanfattning :     The Cassini spacecraft orbits Saturn since 2004, carrying a multitude of instruments for studies of the plasma environment around the planet as well as the constituents of the ring system. Of particular interest to the present thesis is the large E ring, which consists mainly of water ice grains, smaller than a few micrometres, referred to as dust. LÄS MER