Sökning: "thermonuclear alpha particles"

Visar resultat 1 - 5 av 7 avhandlingar innehållade orden thermonuclear alpha particles.

1. 1. Thermonuclear instabilities and fast particle transport in fusion plasmas

   Författare :Tünde Fülöp; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; tokamaks; alpha particles; electron beam transport; Toroidal Alfvén Eigenmodes; thermonuclear instabilities; fusion plasmas; Ion Cyclotron Emission;

   Sammanfattning : .... LÄS MER

3. 2. Modelling Ion Cyclotron Resonance Heating and Fast Wave Current Drive in Tokamaks

   Författare :Abdul Hannan; Torbjörn Hellsten; Dirk van Eester; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Thermonuclear fusion; Tokamak; DIII-D; JET; ITER; DEMO; ICRF; ICRH; Fast magnetosonic waves; TTMP; ELD; ICRH; Thermonuclear;

   Sammanfattning : Fast magnetosonic waves in the ion cyclotron range of frequencies have the potential to heat plasma and drive current in a thermonuclear fusion reactor. A code, SELFO-light, has been developed to study the physics of ion cyclotron resonantheating and current drive in thermonuclear fusion reactors. LÄS MER

4. 3. Non-linear dynamics of Alfvén eigenmodes excited by fast ions in tokamaks

   Författare :Tommy Bergkvist; Torbjörn Hellsten; Fulvio Zonca; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; fusion plasma; tokamak; MHD; toroidal Alfvén eigenmodes; thermonuclear alpha particles; ion cyclotron resonance heating; Electrophysics; Elektrofysik;

   Sammanfattning : The tokamak is so far the most promising magnetic configuration for achieving a net production of fusion energy. The D-T fusion reactions result in 3.5 MeV alpha-particles, which may destabilize Alfvén eigenmodes through wave-particle interaction. LÄS MER

5. 4. 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

7. 5. Thermonuclear Instabilities and Plasma Edge Transport in Tokamaks

   Författare :Tünde Fülöp; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : High-energy ions generated by fusion reactions in a burning fusion plasma may give rise to different types of wave instabilities. The present thesis investigates two types of such instabilities which recently have been observed in fusion experiments: the Toroidal Alfvén Eigenmode (TAE) instability and the magnetoacoustic cyclotron instability (MCI) which is predicted to give rise to ion cyclotron emission (ICE). LÄS MER