The first experimental demonstration that fast ion induced stabilization of thermal turbulent transport takes place also at low values of plasma toroidal rotation has been obtained in JET ILW (ITER-like wall) L-mode plasmas with high (3He)-D ICRH (ion cyclotron resonance heating) power. A reduction of the gyro-Bohm normalized ion heat flux and higher values of the normalized ion temperature gradient have been observed at high ICRH power and low NBI (neutral beam injection) power and plasma rotation. Gyrokinetic simulations indicate that ITG (ion temperature gradient) turbulence stabilization induced by the presence of high-energetic 3He ions is the key mechanism in order to explain the experimental observations. Two main mechanisms have been identified to be responsible for the turbulence stabilization: a linear electrostatic wave-fast particle resonance mechanism and a nonlinear electromagnetic mechanism. The dependence of the stabilization on the 3He distribution function has also been studied

Bonanomi, N., Mantica, P., Di Siena, A., Delabie, E., Giroud, C., Johnson, T., et al. (2018). Turbulent transport stabilization by ICRH minority fast ions in low rotating JET ILW L-mode plasmas. NUCLEAR FUSION, 58(5) [10.1088/1741-4326/aab733].

Turbulent transport stabilization by ICRH minority fast ions in low rotating JET ILW L-mode plasmas

Bonanomi, N
;
2018

Abstract

The first experimental demonstration that fast ion induced stabilization of thermal turbulent transport takes place also at low values of plasma toroidal rotation has been obtained in JET ILW (ITER-like wall) L-mode plasmas with high (3He)-D ICRH (ion cyclotron resonance heating) power. A reduction of the gyro-Bohm normalized ion heat flux and higher values of the normalized ion temperature gradient have been observed at high ICRH power and low NBI (neutral beam injection) power and plasma rotation. Gyrokinetic simulations indicate that ITG (ion temperature gradient) turbulence stabilization induced by the presence of high-energetic 3He ions is the key mechanism in order to explain the experimental observations. Two main mechanisms have been identified to be responsible for the turbulence stabilization: a linear electrostatic wave-fast particle resonance mechanism and a nonlinear electromagnetic mechanism. The dependence of the stabilization on the 3He distribution function has also been studied
Articolo in rivista - Articolo scientifico
Turbulent transport, Plasmas, Gyrokinetic, Fast ions, Tokamak
English
2018
58
5
056025
reserved
Bonanomi, N., Mantica, P., Di Siena, A., Delabie, E., Giroud, C., Johnson, T., et al. (2018). Turbulent transport stabilization by ICRH minority fast ions in low rotating JET ILW L-mode plasmas. NUCLEAR FUSION, 58(5) [10.1088/1741-4326/aab733].
File in questo prodotto:
File Dimensione Formato  
Articolo_EMstabilization_FINAL_vII.pdf

Solo gestori archivio

Dimensione 1.84 MB
Formato Adobe PDF
1.84 MB Adobe PDF   Visualizza/Apri   Richiedi una copia

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/10281/209099
Citazioni
  • Scopus 24
  • ???jsp.display-item.citation.isi??? 23
Social impact