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Related Experiment Video

Updated: May 17, 2026

Simultaneous Measurement of Turbulence and Particle Kinematics Using Flow Imaging Techniques
10:53

Simultaneous Measurement of Turbulence and Particle Kinematics Using Flow Imaging Techniques

Published on: March 12, 2019

C-III flow measurements with a coherence imaging spectrometer.

T R Weber1, S L Allen, J Howard

  • 1Lawrence Livermore National Laboratory, Livermore, California 94550, USA.

The Review of Scientific Instruments
|November 7, 2012
PubMed
Summary

This study presents a new spectrometer for measuring Carbon III (CIII) flow in the DIII-D tokamak divertor. The device enables 2D flow reconstruction, offering insights into plasma dynamics.

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Area of Science:

  • Plasma Physics
  • Spectroscopy
  • Fusion Energy Research

Background:

  • Understanding plasma flow in fusion devices is crucial for confinement.
  • The DIII-D lower divertor is a key area for studying plasma-wall interactions.

Purpose of the Study:

  • To develop and demonstrate a coherence imaging spectrometer for spatially resolved CIII flow measurements.
  • To reconstruct a 2D poloidal cross-section of CIII flow in the DIII-D lower divertor.

Main Methods:

  • Utilized a periscope view for plasma observation.
  • Employed line-of-sight averaged velocity measurements of CIII.
  • Applied tomographic reconstruction to obtain 2D flow profiles.

Main Results:

  • Successfully measured CIII flow in the DIII-D lower divertor.
  • Reconstructed a 2D poloidal cross-section of CIII flow.
  • Demonstrated the diagnostic's capability for detailed plasma flow analysis.

Conclusions:

  • The coherence imaging spectrometer is a viable tool for divertor plasma flow studies.
  • The technique provides valuable data for fusion energy research.
  • Future applications include enhanced plasma control and understanding of divertor physics.