Sökning: "fast ions"

Visar resultat 1 - 5 av 143 avhandlingar innehållade orden fast ions.

  1. 1. Dynamics of Fast Ions in Tokamaks

    Författare :Per Helander; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : Fast ions play a prominent role in the heating of tokamak plasmas by, e.g., neutral- beam injection, ion-cyclotron-resonance heating, and alpha-particle heating. In this thesis, a number of physical and mathematical problems concerning the dynamics of fast ions in tokamaks are addressed. LÄS MER

  3. 2. Fast wave heating of cyclotron resonant ions in tokamaks

    Författare :Thomas Johnson; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fusion plasma; tokamak; RF heating; fast wave heating; fast wave current drive; ion cyclotron resonance; ICRH; ICRF; ICCD; RF induced rotation; RF induced transport; RF induced pinch; RF pinch; finite orbit width; fast wave current drive; self-consi; Engineering physics; Teknisk fysik;

    Sammanfattning : .... LÄS MER

  4. 3. Fast and Scalable Entangling Gate in Trapped Ions via Rydberg Interaction

    Författare :Chi Zhang; Markus Hennrich; Peter Zoller; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; trapped ions; Rydberg interaction; quantum entanglement; fysik; Physics;

    Sammanfattning : Trapped Rydberg ions are a novel platform for quantum information processing. This approach combines the advanced quantum control of trapped ions and the strong dipolar interaction of Rydberg atoms. LÄS MER

  5. 4. Fast ions and turbulent particle transport in tokamaks

    Författare :Frida Eriksson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NBI; numerical modelling; turbulence; drift waves; bump-on-tail; density peaking; Fusion plasma physics; wave-particle interaction;

    Sammanfattning : The presence of highly energetic (fast) ions, be it fusion born alpha particles or ions accelerated by auxiliary heating schemes, can affect the heating and transport of all particles in the plasma through two main mechanisms. First, fast ions may excite fast ion driven instabilities. LÄS MER

  7. 5. Fast wave heating and current drive in tokamaks

    Författare :Martin Laxåback; Torbjörn Hellsten; Raymond Koch; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Tokamak; JET; ITER; thermonuclear fusion; fast wave; heating; current drive; ion cyclotron resonance; polychromatic; finite orbit widths; RF-induced transport; neutral beam injection; fusion born alpha particles; magnetosonic eigenmodes; parasitic absorption; modelling; weighted Monte Carlo scheme; Fysik; Physics; Fysik;

    Sammanfattning : This thesis concerns heating and current drive in tokamak plasmas using the fast magnetosonic wave in the ion cyclotron range of frequencies. Fast wave heating is a versatile heating method for thermonuclear fusion plasmas and can provide both ion and electron heating and non-inductive current drive. LÄS MER