Characterisation of the fast-ion edge resonant transport layer induced by 3D perturbative fields in the ASDEX Upgrade tokamak through full orbit simulations

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

Tutkijat

  • L. Sanchis
  • M. Garcia-Munoz
  • Antti Snicker

  • D. A. Ryan
  • D. Zarzoso
  • L. Chen
  • J. Galdon-Quiroga
  • M. Nocente
  • J. F. Rivero-Rodriguez
  • M. Rodriguez-Ramos
  • W. Suttrop
  • M. A. Van Zeeland
  • E. Viezzer
  • M. Willensdorfer
  • F. Zonca

Organisaatiot

  • University of Seville
  • CSIC
  • JET
  • CNRS
  • Zhejiang University
  • University of Milan - Bicocca
  • Max-Planck-Institut für Plasmaphysik
  • General Atomics
  • Agenzia nazionale per le nuove tecnologie, l'energia e lo sviluppo economico sostenibile

Kuvaus

In recent experiments at the ASDEX Upgrade tokamak the existence of an Edge Resonant Transport Layer (ERTL) was revealed as the main transport mechanism responsible for the measured fast-ion losses in the presence of externally applied 3D fields. The Monte Carlo orbit-following code ASCOT was used to study the fast-ion transport including the plasma response calculated with MARS-F, reproducing a strong correlation of fast-ion losses with the poloidal mode spectra of the 3D fields. In this work, a description of the physics underlying the ERTL is presented by means of numerical simulations together with an analytical model and experimental measurements to validate the results. The degradation of fast-ion confinement is calculated in terms of the variation of the toroidal canonical momentum (δP φ). This analysis reveals resonant patterns at the plasma edge activated by 3D perturbations and emphasizes the relevance of nonlinear resonances. The impact of collisions and the radial electric field on the ERTL is analysed.

Yksityiskohdat

AlkuperäiskieliEnglanti
Artikkeli014038
Sivut1-10
JulkaisuPlasma Physics and Controlled Fusion
Vuosikerta61
Numero1
TilaJulkaistu - 1 tammikuuta 2019
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

ID: 30559678