Sökning: "JET tokamak"

Visar resultat 21 - 25 av 37 avhandlingar innehållade orden JET tokamak.

  1. 21. Turbulent transport in tokamak plasmas: linear-, quasi- and non-linear simulations

    Författare :Emil Fransson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Fusion – Plasma physics – Turbulent transport – Gyrofluid – Gyrokinetic;

    Sammanfattning : An attractive energy source is nuclear fusion with its abundance of fuel, intrinsic safety and limited environmental impact. Although the concept of fusion energy was established in the 1920s, to develop fusion as an energy source has been challenging. LÄS MER

  3. 22. Calculation and Measurement of the Neutron Emission Spectrum due to Thermonuclear and Higher-Order Reactions in Tokamak Plasmas

    Författare :Luigi Ballabio; Jef Ongena; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Nuclear physics; Kärnfysik; Nuclear physics; Kärnfysik; Applied Nuclear Physics; tillämpad kärnfysik;

    Sammanfattning : A series of analytic and numerical models have been developed for the prediction and interpretation of the energy spectrum of the neutron emission from thermonuclear deuteriumtritium (DT) plasmas. The main component of the neutron emission, due to reactions between thermal fuel ions, has been modeled as well as minority components due to the presence of fast (supra-thermal) ions. LÄS MER

  4. 23. Impact of erosion and deposition processes on wall materials in tokamaks

    Författare :Sunwoo Moon; Marek Rubel; Per Petersson; Wolff Max; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Electrical Engineering; Elektro- och systemteknik;

    Sammanfattning : Understanding of material migration and control of fuel retention are essential for the safe operation of a reactor-class fusion machine. Work presented in the thesis focuses on erosion-deposition processes which are decisive for the formation and properties of co-deposited fuel-containing layers on plasma-facing and diagnostic components, and for the dust formation. LÄS MER

  5. 24. Influence of Geometry on Drift Waves in Tokamaks and Stellarators

    Författare :Tariq Rafiq; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; ITG; local magnetic shear; linear instabilities; drift waves;

    Sammanfattning : There is a general consensus that drift waves are responsible for a large amount of transport in fusion experiments and it is of importance to investigate their linear stability and nonlinear evolution. These instabilities have therefore been intensively investigated in tokamaks for the last few decades. LÄS MER

  7. 25. Neutron emission spectroscopy studies of fusion plasmas of deuterium-tritium in tokamaks

    Författare :Marco Tardocchi; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Nuclear physics; Kärnfysik; Nuclear physics; Kärnfysik; Applied Nuclear Physics; tillämpad kärnfysik;

    Sammanfattning : Neutron emission spectroscopy measurements were performed at the Joint European Torus(JET) to study fusion plasmas of deuterium-tritium. The instrument used, the magnetic protonrecoil (MPR) neutron spectrometer, was designed and optimised for plasmas of high fusionpower (PF). LÄS MER