BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Memento EPFL//
BEGIN:VEVENT
SUMMARY:Simulation of micro-tearing modes
DTSTART:20150501T103000
DTEND:20150501T113000
DTSTAMP:20260407T041049Z
UID:5e69277f9b2a1a31d39a1cff1b6dee4df8da063a87e323be17e8e231
CATEGORIES:Conferences - Seminars
DESCRIPTION:Michail-Savvas Anastopoulos-Tzanis\, Univ. of York\, UK\nMicro
 -tearing modes (MTMs) are considered as an additional candidate for explai
 ning enhanced electron transport in present and future tokamaks. MTMs are 
 destabilised due to the existence of electron temperature gradient ∇Te i
 n the semi-collisional regime nei/w*ne > 1. However\, gyro-kinetic simulat
 ions revealed that MTMs are destabilised even in the collision-less nei/w*
 ne ≪ 1 regime indicating the existence of additional drive mechanisms an
 d possible contribution from magnetic drifts. A review of the linear dispe
 rsion relation in the collision-less regime in slab geometry\, resulted in
  negative growth rate indicating stability. Further simulations of the ful
 l linear problem in cylindrical geometry using the GS2 code\, were in acco
 rdance with previous simulations and the complex frequency of the system a
 greed qualitatively with analytic theory. Moreover\, extension to toroidal
  geometry revealed the strong destabilising influence of magnetic gradient
  drifts and trapped particle effects. However\, the effect of curvature dr
 ifts was found to have minute influence for further destabilisation. Final
 ly\, MTMs were found to change drive for large values of the electric resi
 stivity he\, which was accompanied by destabilisation in the collision-les
 s regime.
LOCATION:PPB 019
STATUS:CONFIRMED
END:VEVENT
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