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A new imaging system captures tokamak plasma in infrared and visible light, revealing heat flux patterns and fast-ion losses. This technology aids in understanding plasma behavior and optimizing fusion reactor performance.

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Area of Science:

  • Plasma Physics
  • Fusion Energy Research
  • Diagnostic Techniques

Background:

  • Tokamak devices require advanced diagnostics for plasma confinement.
  • Understanding heat flux and particle losses is crucial for fusion reactor design.

Purpose of the Study:

  • To introduce and demonstrate a novel wide-angle, dual-light imaging system for tokamaks.
  • To analyze plasma behavior, including heat flux profiles and fast-ion losses.

Main Methods:

  • Installation of an imaging system with a tangential view of the poloidal cross-section.
  • Utilizing infrared (IR) and visible light cameras separated by a dichroic beam splitter.
  • Employing spatial calibration via CAD-rendered image warping to data images.

Main Results:

  • The IR camera successfully mapped scrape-off layer heat flux in various plasma configurations.
  • Observed fast-ion losses to the outer wall during neutral beam injection.
  • Demonstrated reduced peak wall heat loading with disruption mitigation techniques.

Conclusions:

  • The new imaging system provides valuable insights into tokamak plasma dynamics.
  • This diagnostic is effective for studying heat flux and particle interactions.
  • The system aids in developing strategies for fusion energy optimization and reactor safety.