Crews, D. W., Meier, E. T., & Shumlak, U. (2024). Z Pinch Kinetics II -- A Continuum Perspective: Betatron Heating and Self-Generation of Sheared Flows. arXiv preprint arXiv:2411.06674.
This research paper investigates the kinetic effects of collisionless adiabatic compression in Z-pinch plasmas, focusing on the interplay between betatron heating, anisotropy, and the self-generation of sheared flows. The authors aim to develop a deeper understanding of these phenomena and their implications for Z-pinch fusion devices.
The authors employ a theoretical approach, leveraging the adiabatic invariants of cyclotron and betatron motions to analyze the compression of self-magnetizing current filaments in Z-pinch devices. They develop a hybrid Chew-Goldberger-Low (CGL) model to describe the anisotropic response of the plasma and explore the kinetic equilibrium of a flow expanded in the flux function. Additionally, they investigate the role of weakly collisional gyroviscosity in both forward (forced flow) and inverse (forced anisotropy) processes.
The study highlights the significant role of kinetic effects in Z-pinch plasmas, particularly the interplay between betatron heating, anisotropy, and sheared flows. The authors conclude that these collisionless processes can significantly influence plasma confinement, stability, and transport properties in Z-pinch fusion devices.
This research provides valuable insights into the complex kinetic dynamics of Z-pinch plasmas, contributing to the development of more accurate models and improved designs for Z-pinch fusion reactors. The findings have implications for understanding plasma behavior in astrophysical settings as well.
The study focuses on idealized theoretical models and numerical simulations. Further experimental validation is crucial to confirm the findings in real-world Z-pinch devices. Additionally, investigating the impact of non-adiabatic effects, such as collisions and instabilities, on the observed phenomena is essential for a comprehensive understanding of Z-pinch plasma dynamics.
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by D.W. Crews, ... at arxiv.org 11-12-2024
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