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<p>The kinematic viscosity of reversed-field pinch fusion plasmas plays an important role in the physical understanding of helical self-organized states. Unlike previous studies that relied on correlation-based methods and simulations, this work employs Bayesian model comparison to objectively rank candidate viscosity models, accounting for model complexity and goodness-of-fit using data from the RFX-mod experiment. The Bayesian approach, exhibiting several advantages over conventional model comparison tools, reveals a clear preference for the perpendicular viscosity model.</p>

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Bayesian Comparison of Kinematic Viscosity Models in Reversed-Field Pinch Fusion Plasmas

  • 期刊论文

  • 发表日期：

    2026年6月25日

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  • J. De Rycke,
  • S. Cappello,
  • G. Spizzo,
  • D. Terranova,
  • M. Veranda,
  • G. Verdoolaege

摘要

The kinematic viscosity of reversed-field pinch fusion plasmas plays an important role in the physical understanding of helical self-organized states. Unlike previous studies that relied on correlation-based methods and simulations, this work employs Bayesian model comparison to objectively rank candidate viscosity models, accounting for model complexity and goodness-of-fit using data from the RFX-mod experiment. The Bayesian approach, exhibiting several advantages over conventional model comparison tools, reveals a clear preference for the perpendicular viscosity model.