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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)
Revision as of 17:40, 20 January 2022
, 20 January 2022→Description of the activity
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== Description of the activity == | == Description of the activity == | ||
Enter description here <ref>A. Einstein, Journal of Exceptional Results (2017)</ref>, including motivation/objectives and experience of the proponent (typically one-two pages) | Enter description here <ref>A. Einstein, Journal of Exceptional Results (2017)</ref>, including motivation/objectives and experience of the proponent (typically one-two pages) | ||
== Background == | |||
The goal of the proposal is to find ECRH launching configurations for which the amplitude of | |||
NBI-driven Alfvén Eigenmodes (AEs) is mitigated. Besides the interest that such scenarios have for the fast particles topic, studies of coupling between NBI-driven AEs and low frequency zonal flows may also benefit from them. | |||
Many scenarios making use of different "control" parameters | |||
have already been tested in past experimental sessions, showing always strong changes in AEs activity. | |||
Plasma density variations and changes of the rotational transform profile due to the | |||
many contributions to the total plasma current (NBCD, ECCD, Bootstrap current) are the parameters | |||
with the higher impact. However, although inducing modifications in the general spectrum of the excited modes, | |||
none of the investigated scenarios show a clear possibility to suppress AEs without inducing large | |||
changes in plasma parameters, being the most promising the one employing ECCD. | |||
In this particular case we intend to investigate the effect of | |||
off-axis ECCD at different plasma radius. | |||
== International or National funding project or entity == | == International or National funding project or entity == | ||