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Hittade 3 uppsatser som matchar ovanstående sökkriterier.

1. 1. Low–voltage External Discharge Plasma Thruster and Hollow Cathodes Plasma Plume Diagnostics Utilising Electrostatic Probes and Retarding Potential Analyser

   Master-uppsats, Luleå tekniska universitet/Rymdteknik

   Författare :George-Cristian Potrivitu; [2016]
   Nyckelord :space electric propulsion; in-space advanced propulsion technology; Hall effect thruster; hollow cathode; wall-less Hall thruster; external discharge plasma thruster; single Langmuir probe; double Langmuir probe; emissive probe; retarding potential analyzer; plume plasma diagnostics; low-voltage Hall thruster; high-current hollow cathode; plasma parameters; propulsion electrique pour l espace; cathode creuse à fort courant; propulseur à décharge externe de plasma; propulseur à effet Hall à basse tension; techniques de diagnostic du plasma; sonde de Langmuir simple; sonde de Langmuir double; sonde émissive; analyseur à potentiel retardé;

   Sammanfattning : The present thesis is the result of a research period at the Institute of Space and Astronautical Science of the Japanese Aerospace Exploration Agency, ISAS/JAXA within Funaki Laboratory of the Department of Space Flight Systems that followed the path of plume plasma diagnostics for space electric propulsion drives. During the experimental studies two high-current hollow cathodes and an innovative prototype of a low-voltage fully external discharge plasma thruster (XPT) had their plasma plumes diagnosed using electrostatic probes and retarding potential analyser (RPA). LÄS MER

3. 2. Design and Characterisation of A SynchronousCo-Axuak Double Magnetron Sputtering System

   Master-uppsats, Institutionen för fysik, kemi och biologi

   Författare :Asim Aijaz; [2009]
   Nyckelord :HiPIMS; magnetron sputtering; co-axial double magnetron; side-ways deposition; cylindrical shaped objects;

   Sammanfattning : High power impulse magnetron sputtering (HiPIMS) is a novel pulsed power technique. In HiPIMS, high power pulses are applied to the target for short duration with a low duty factor. LÄS MER

4. 3. Dynamics of the Current-Voltage Characteristic and the Potential in a Triple Plasma Machine

   Master-uppsats, KTH/Alfvénlaboratoriet; KTH/Rymd- och plasmafysik

   Författare :Tomas Hurtig; [1997]
   Nyckelord :;

   Sammanfattning : A model for the static current voltage characteristic of a thin collisionless plasma inwich an electrical double layer is present is used for simulating the behaviour of anelectrical circuit in wich the plasma is a component. The numerical results thusobtained are compared to experimental results and found to be quite accurate forlow frequencies and amplitudes. LÄS MER