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Related Experiment Videos

Dual array 3D electron cyclotron emission imaging at ASDEX Upgrade.

I G J Classen1, C W Domier2, N C Luhmann2

  • 1FOM-Institute DIFFER, Dutch Institute for Fundamental Energy Research, 3430 BE Nieuwegein, The Netherlands.

The Review of Scientific Instruments
|November 29, 2014
PubMed
Summary

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The upgraded electron cyclotron emission imaging diagnostic now provides quasi-3D electron temperature measurements. This advancement allows for direct observation of 3D plasma instability properties, enhancing fusion energy research.

Area of Science:

  • Plasma Physics
  • Fusion Energy Research
  • Diagnostic Technology

Background:

  • The ASDEX Upgrade tokamak utilizes advanced diagnostics for plasma research.
  • Electron Cyclotron Emission Imaging (ECEI) is crucial for measuring electron temperature profiles.

Purpose of the Study:

  • To upgrade the existing 2D ECEI diagnostic at ASDEX Upgrade.
  • To enable quasi-3D measurements of electron temperature for enhanced plasma instability analysis.

Main Methods:

  • Installation of a second detector array for the ECEI diagnostic.
  • Achieving toroidal separation of 40 cm between two 2D detector arrays.
  • Simultaneous observation of plasma field lines by both arrays.

Main Results:

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  • The enhanced ECEI system provides 288 total channels across two 2D arrays.
  • Quasi-3D electron temperature measurements are now achievable.
  • Direct measurement of 3D plasma instability properties, such as edge localized mode filaments, is enabled.

Conclusions:

  • The upgraded ECEI diagnostic significantly advances the capability for 3D plasma analysis.
  • This facilitates a deeper understanding of plasma instabilities in fusion devices.
  • The new system is vital for optimizing future fusion reactor designs.