View source for TJ-II:Why fast particle electromagnetic induced stabilization in fusion plasmas?

== Experimental campaign ==
2019 Autumn

== Proposal title ==
'''Why fast particle electromagnetic induced stabilization in fusion plasmas?'''

== Name and affiliation of proponent ==
CIEMAT, Kurchatov HIBP team, Kharkov HIBP team

== Details of contact person at LNF ==
Alvaro Cappa, Carlos Hidalgo

== Description of the activity ==
Fast ions have been found to impact plasma confinement <ref>J. Citrin et al., PRL 111 (2013) 155001</ref>. Understanding the underlying physics is an essential task for future fusion reactors where plasmas will be dominated by fast particle dynamics.  In particular, non-linear excitations of zonal structures by fast particle driven modes are predicted to play an important role on the nonlinear dynamics of AEs and related transport <ref> Z Qiu et al., PRL 120 (2018) 135001</ref>.

Non-linear coupling between AEs and low frequency zonal flows have been reported in TJ-II using Doppler reflectometry [<ref>T. Estrada et al., NF 55 (2015) 063005</ref>] and HIBP measurements.

The goal is to address the following questions:

1. Relation between fast particle driven modes and zonal structures: Is there any evidence of Zonal Flows (i.e. electric fields) or / and Zonal Fields (i.e. magnetic fields) driven by fast particles?. If yes, do they play any role on thermal transport Impact?

2. Non-linear interplay between high (AEs) and low frequency modes: do they play any role in the non-linear saturation mechanisms of AEs?

Experiment will be carried out in plasma scenarios with different AEs control knobs, including: ECRH power, on and off axis ECCD, plasma density and magnetic configuration <ref>A. Cappa, Physics Meeting October 14th 2019</ref>.

== International or National funding project or entity ==
If applicable, enter funding here or write N/A

== Description of required resources ==
Required resources:
* Number of plasma discharges or days of operation: 
* Essential diagnostic systems:
* Type of plasmas (heating configuration):
* Specific requirements on wall conditioning if any:
* External users: need a local computer account for data access: yes/no
* Any external equipment to be integrated? Provide description and integration needs:

== Preferred dates and degree of flexibility ==
Preferred dates: (format dd-mm-yyyy)

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== References ==
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