Sökning: "Plasma discharges"

Visar resultat 1 - 5 av 48 avhandlingar innehållade orden Plasma discharges.

  1. 1. Plasma-Facing Components in Tokamaks : Studies of Wall Conditioning Processes and Plasma Impact on Diagnostic Mirrors

    Författare :Álvaro García Carrasco; Marek Rubel; Marco Cecconello; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Plasa-wall interactions; wall conditioning; tracers; diagnostic mirrors; ICWC; Physics; Fysik;

    Sammanfattning : Understanding of material migration and its impact on the formation of co-deposited mixed material layers on plasma-facing components is essential for the development of fusion reactors. This thesis focuses on this topic. It is based on experiments performed at JET and TEXTOR tokamaks. LÄS MER

  3. 2. Optical Diagnostics of Non-thermal Plasmas and Plasma-assisted Combustion

    Författare :Jiajian Zhu; Förbränningsfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; High-speed photography; Laser diagnostics; Planar laser-induced fluorescence; Plasma-assisted combustion; Non-thermal plasmas; Gliding arc discharge; Optical diagnostics; Particle tracking velocimetry; Fysicumarkivet A:2015:Zhu;

    Sammanfattning : Non-thermal plasma is regarded as a collection of free electrons, ions and neutral particles that are not at local thermodynamic equilibrium. The high-energetic electrons formed in non-thermal plasmas are capable of generating chemically active species and modifying chemical kinetics in practical applications. LÄS MER

  4. 3. Characterization of metal plasma streams from arc discharges in a reactive environment

    Författare :Johanna Rosén; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Alumina is a material used in many applications mainly due to its chemical inertness and wear resistance at high temperatures. Despite this, the understanding of alumina thin films is not satisfactory, as can be concluded from the diverging material properties reported in the literature. LÄS MER

  5. 4. Impact of material migration on plasma-facing components in tokamaks

    Författare :Alvaro Garcia Carrasco; Marek Rubel; Didier Mazon; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Fusion; material migration; wall conditioning; diagnostic mirrors; plasma-facing materials; Physics; Fysik;

    Sammanfattning : Plasma-wall interaction plays an essential role in the performance and safety of a fusion reactor. This thesis focuses on the impact of material migration on plasma-facing components. It is based on experiments performed in tokamaks: JET, TEXTOR and ASDEX Upgrade. LÄS MER

  7. 5. Gyrokinetic simulations of microturbulence and transport in tokamak plasmas

    Författare :Daniel Tegnered; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; ITG; Joint European Torus; impurities; transport; fusion; TEM; tokamak; turbulence; plasma physics; gyrokinetics;

    Sammanfattning : Fusion power is one of few viable and sustainable means of energy production. The tokamak is arguable the most mature technology to magnetically confine fusion plasmas. In these devices, heat and particle transport is dominated by small-scale turbulent fluctuations. LÄS MER