TJ-II: Searching for AEs suppression scenarios using off-axis ECCD: Difference between revisions

TJ-II: Searching for AEs suppression scenarios using off-axis ECCD (view source)

248 bytes added , 16 October 2019

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 Á. Cappa
-== Description of the activity ==
+== Background ==
 [[File:imagen1.png |thumb|right|300px| Figure 1. Heating scheme. ECH2 beam is launched with two different power levels]]
 The goal of the proposal is to find ECRH launching configurations for which the amplitude of
-NBI-driven Alfvén Eigenmodes is mitigated. In this particular case we intend to investigate the effect of off-axis ECCD at different
+NBI-driven Alfvén Eigenmodes is mitigated. Many different scenarios have already been tested, showing always
+strong changes in AEs activity related to changes in plasma conditions or to changes in rotational transform profiles.
+increasing density or using ON-axis ECCD to modify iota and . some of this. In this particular case we intend to investigate the effect of off-axis ECCD at different
 plasma radius. The heating power set-up shown in figure 1 will allows us to investigate the effect of ECCD with different combinations of power and ECCD efficiency. Studies of coupling between NBI-driven AEs and low frequency zonal flows will benefit from scenario in which AEs activity can be altered without inducing large changes in plasma conditions.