Nonmagnetohydrodynamic effects, caused by a minority population of energetic particles and/or by the large gyroradii of the main ion population, strongly modify the stability of a high temperature toroidal plasma against m = 1 internal modes. It is shown that the enhanced stability due to the presence of the energetic particles is reduced in the large gyroradius regime, where the width of the transition layer of the mode is determined by the gyroradius of the main ions. This modification results from the presence of a discrete spectrum of resistively damped Alfven-type modes which can be destabilized through the resonance with the energetic particles.

LARGE GYRORADIUS M=1 ALFVEN MODES AND ENERGETIC PARTICLES

PEGORARO, FRANCESCO;
1991

Abstract

Nonmagnetohydrodynamic effects, caused by a minority population of energetic particles and/or by the large gyroradii of the main ion population, strongly modify the stability of a high temperature toroidal plasma against m = 1 internal modes. It is shown that the enhanced stability due to the presence of the energetic particles is reduced in the large gyroradius regime, where the width of the transition layer of the mode is determined by the gyroradius of the main ions. This modification results from the presence of a discrete spectrum of resistively damped Alfven-type modes which can be destabilized through the resonance with the energetic particles.
Pegoraro, Francesco; Porcelli, F; Schep, Tj
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/18230
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? 5
social impact