Sökning: "dusty plasma"

Visar resultat 6 - 10 av 10 avhandlingar innehållade orden dusty plasma.

1. 6. Saturn's dusty equatorial ionosphere from Cassini's Grand Finale observations

   Författare :Joshua Dreyer; Erik Vigren; Lorenz Roth; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Saturn; Cassini; ionosphere; space plasma; planetary science; Fysik med inriktning mot rymd- och plasmafysik; Physics with specialization in Space and Plasma Physics;

   Sammanfattning : The Cassini mission provided unprecedented insights into the Kronian system and revealed many unexpected phenomena relating to dusty plasma environments around Saturn and its rings. Almost 13 years after its arrival, Cassini began a series of 22 orbits which brought it between Saturn's upper atmosphere and the innermost D ring, culminating in a final plunge into Saturn's ionosphere. LÄS MER

3. 7. Dusty plasma response to a moivng test charge

   Författare :Muhammad Shafiq; Michael A. Raadu; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics; Dusty Plasmas; Complex Plasmas; Grain size distribution; Grain charging dynamics; Fysik; Physics; Fysik;

   Sammanfattning : This licentiate thesis reports analytical results for the electrostatic response to a test charge moving through dusty plasma. Two particular cases for a slowly moving test charge, namely, grain size distribution and grain charging dynamics are considered. LÄS MER

4. 8. Pre-biotic molecules and dynamics in the ionosphere of Titan : a space weather station perspective

   Författare :Oleg Shebanits; Jan-Erik Docent; Ingo Müller-Wodarg; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Saturn; Titan; Ionosphere; Langmuir Probe; Space and Plasma Physics; Rymd- och plasmafysik;

   Sammanfattning : Saturn’s largest moon Titan (2575 km radius) is the second largest in the Solar system. Titan is the only known moon with a fully developed nitrogen-rich atmosphere with ionosphere extending to ~2000 km altitude, hosting complex organic chemistry. LÄS MER

5. 9. Nonlinear Dust Particle Dynamics and Collective Effects in Complex Plasmas

   Författare :Gianfranco Sorasio; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics; Complex Dusty Plasmas; Self excited; Nonlinear; Forced Oscillations; Electrostatic Instabilities in current-carrying magnetoplasmas; Cross-field instabilities in magnetized dusty plasmas; Dust Acoustic Waves; Electrostatic Dust Cyclotron Waves; Fysik; Physics; Fysik; fysik; Physics;

   Sammanfattning : Theoretical studies of dusty plasmas have been performed by focusing attention principally on collective phenomena and on grain motion. This thesis consists of a collection of seven published papers that explore both the collective behavior of a complex plasma system as well as the dynamics of grains in plasmas. LÄS MER

7. 10. Generation of magnetic fields in plasmas

   Författare :Nitin Shukla; Gert Brodin; Dusan Jovanovic; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : Relativistic and non-relativistic plasma outflows are quite ubiquitous in astrophysical scenarios, as well as in laboratory plasmas. The propagation of relativistic and non- relativistic charged particle beams in background plasmas provides return currents in the opposite direction and interactions between the currents then drive several plasma instabilities involving the longitudinal (electrostatic instabilities) and trans- verse (electromagnetic instability) modes. LÄS MER