TJ-II:Role of isotope mass on the radial width of Zonal Flows: Difference between revisions

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==Time-space properties of the global potential oscillation, which is ascribed to the low frequency zonal flows, have been investigated in two plasmas produced by ECRH and NBI heating schemes that are characterized by different mean radial electric field structures.  
Time-space properties of the global potential oscillation, which is ascribed to the low frequency zonal flows, have been investigated in two plasmas produced by ECRH and NBI heating schemes that are characterized by different mean radial electric field structures.  
The width of the oscillating structure strongly depends on the heating scheme <ref>T Kobayashi, U Losada, B Liu et al., Nuclear Fusion (2019) in press</ref>. Preliminary results roughly suggest that the radial width of LRC increases with the ion mass in NBI scenarios <ref>U Losada PhD Thesis (2019)</ref>. Those results show, for the first time and with unprecedented detail, how sensitive are the properties of zonal flows to plasma conditions, providing a key experimental guidance for model validation.  
The width of the oscillating structure strongly depends on the heating scheme <ref>T Kobayashi, U Losada, B Liu et al., Nuclear Fusion (2019) in press</ref>. Preliminary results roughly suggest that the radial width of LRC increases with the ion mass in NBI scenarios <ref>U Losada PhD Thesis (2019)</ref>. Those results show, for the first time and with unprecedented detail, how sensitive are the properties of zonal flows to plasma conditions, providing a key experimental guidance for model validation.  
To goal of this proposal is to expand the existing database of the width of zonal flows with emphasis on the isotope mass effect.
To goal of this proposal is to expand the existing database of the width of zonal flows with emphasis on the isotope mass effect.

Revision as of 16:49, 27 January 2019

Experimental campaign

2019 Spring

Proposal title

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Ulises Losada et al.,

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Ulises Losada

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Time-space properties of the global potential oscillation, which is ascribed to the low frequency zonal flows, have been investigated in two plasmas produced by ECRH and NBI heating schemes that are characterized by different mean radial electric field structures. The width of the oscillating structure strongly depends on the heating scheme [1]. Preliminary results roughly suggest that the radial width of LRC increases with the ion mass in NBI scenarios [2]. Those results show, for the first time and with unprecedented detail, how sensitive are the properties of zonal flows to plasma conditions, providing a key experimental guidance for model validation. To goal of this proposal is to expand the existing database of the width of zonal flows with emphasis on the isotope mass effect.

collaboration with NIFS (Japan) & ENN (China)

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Description of required resources

Required resources:

  • Number of plasma discharges or days of operation: 2 days
  • Essential diagnostic systems: dual edge probes, dual HIBP
  • Type of plasmas (heating configuration):NBI, H and D operation
  • 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 20-05-2019)


References

  1. T Kobayashi, U Losada, B Liu et al., Nuclear Fusion (2019) in press
  2. U Losada PhD Thesis (2019)

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