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SUMMARY:3D turbulence simulations of edge transport barrier dynamics and r
 esonant magnetic perturbations
DTSTART:20140606T150000
DTEND:20140606T160000
DTSTAMP:20260916T042513Z
UID:10f6feb34aa2fd65011842616ae85cba4ebc6d3a01b3a17cad5de686
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Peter Beyer\, Université d'Aix Marseille\, France\nThre
 e dimensional fluid simulations of tokamak edge turbulence are presented. 
 First\, a transport barrier is generated by an externally driven sheared r
 otation. This barrier is found to relax quasi-periodically and each relaxa
 tion is associated with a strong heat burst. Externally imposed resonant m
 agnetic perturbations (RMPs) are found to stabilize the barrier relaxation
 s. The penetration of such RMPs in the turbulent plasma is studied within 
 the self-consistent electromagnetic model. Stationary convection cells ass
 ociated with magnetic islands are found to contribute significantly to the
  local heat transport. In a second part of the presentation\, it is shown 
 that spontaneous transport barrier generation can be reproduced by these 3
 D turbulence simulations. A key ingredient therein is the role on the radi
 al electric field of collisional friction between trapped and passing part
 icles.
LOCATION:PPB 019
STATUS:CONFIRMED
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