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TJ-II:Influence of electron / ion root and ion mass on the radial and frequency structure of zonal flows in TJ-II: Difference between revisions
TJ-II:Influence of electron / ion root and ion mass on the radial and frequency structure of zonal flows in TJ-II (view source)
Revision as of 15:05, 6 March 2018
, 6 March 2018→Description of the activity, including motivation/objectives and experience of the proponent (typically one-two pages)
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== Description of the activity, including motivation/objectives and experience of the proponent (typically one-two pages)== | == Description of the activity, including motivation/objectives and experience of the proponent (typically one-two pages)== | ||
Results reported in the TJ-II plasma edge region | Results reported in the TJ-II plasma edge region have shown, with unprecedented detail, how sensitive are the properties of zonal flows to plasma conditions providing key experimental guidance for model validation <ref>Kobayashi, Losada, Liu et al., 2018</ref>. | ||
In two plasmas produced by different heating (ECRH and NBI) schemes and characterized by different mean radial electric field structures, frequency-space-decomposed spectra of the global potential oscillation has been analyzed. In both cases, the oscillatory field has a monopole potential structure and a dipole radial electric field structure in the edge region. The width of the oscillating structure depends on its frequency as well as the heating scheme. As the frequency decreases, the oscillating structure asymptotically approaches to the mean profile. | |||
Whether this sensitive is due to the magnitude / sign of radial neoclassical electric fields affecting Reynolds stress driven ZFs, neoclassical mechanisms, plasma collisionality or / and fast particle effects remain an open question. | Whether this sensitive is due to the magnitude / sign of radial neoclassical electric fields affecting Reynolds stress driven ZFs, neoclassical mechanisms, plasma collisionality or / and fast particle effects remain an open question. | ||
== If applicable, International or National funding project or entity == | == If applicable, International or National funding project or entity == | ||