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Motional Stark Effect (MSE) polarimetry now provides real-time plasma pitch angle measurements for fusion research. This advancement enables faster equilibrium reconstruction and plasma control, improving stability and confinement studies.

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Area of Science:

  • Plasma physics
  • Fusion energy research
  • Diagnostic techniques

Background:

  • Motional Stark Effect (MSE) polarimetry is crucial for plasma fusion research.
  • It measures the radial magnetic pitch angle profile using Stark split D-alpha emission.
  • Current methods are typically post-processing, limiting real-time application.

Purpose of the Study:

  • To implement MSE polarimetry for real-time data acquisition.
  • To integrate real-time results into plasma control systems.
  • To enable real-time equilibrium reconstruction and control for enhanced plasma stability.

Main Methods:

  • Utilized MSE diagnostic to measure pitch angle profiles from neutral beam interactions.
  • Developed and applied algorithms for real-time data processing.
  • Integrated the real-time MSE data stream with the plasma control system.

Main Results:

  • Successfully adapted the MSE diagnostic for real-time operation.
  • Demonstrated the capability to pass real-time pitch angle data to the control system.
  • Enabled real-time equilibrium reconstruction and control based on MSE measurements.

Conclusions:

  • Real-time MSE polarimetry is feasible and beneficial for fusion devices.
  • This advancement supports improved plasma stability, confinement, and transport studies.
  • The integration enhances the potential for active feedback control in fusion plasmas.