TJ-II:Why fast particle electromagnetic induced stabilization in fusion plasmas?: Difference between revisions

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== Description of the activity ==
== 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>.
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>.
The goal is to address the following questions:
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?
Non-linear interplay between high (AEs) and low frequency modes:
If yes, do they play any role in the non-linear saturation mechanisms of AEs?
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.


== International or National funding project or entity ==
== International or National funding project or entity ==

Revision as of 11:02, 7 October 2019

Experimental campaign

2019 Autumn

Proposal title

Why fast particle electromagnetic induced stabilization in fusion plasmas?

Name and affiliation of proponent

Carlos Hidalgo

Details of contact person at LNF

If applicable, enter contact person here or write N/A

Description of the activity

Fast ions have been found to impact plasma confinement [1]. 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 [2].

The goal is to address the following questions:

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?

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

Non-linear coupling between AEs and low frequency zonal flows have been reported in TJ-II using Doppler reflectometry [[3]] and HIBP measurements.

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)

References

  1. J. Citrin et al., PRL 111 (2013) 155001
  2. Z Qiu et al., PRL 120 (2018) 135001
  3. T. Estrada et al., NF 55 (2015) 063005

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