Conversion of Magnetic Energy to Plasma Kinetic Energy During Guide Field Magnetic Reconnection in the Laboratory

Bose, Sayak; Fox, William; Ji, Hantao; Yoo, Jongsoo; Goodman, Aaron; Alt, Andrew; Yamada, Masaaki

doi:10.1103/physrevlett.132.205102

Cited by 3 publications

(1 citation statement)

References 39 publications

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“…a probability distribution over possible functions that fit a set of discrete data points. The blue curve in Figure 6 gives the mean of the probability distribution, i.e., the most probable characterization of the data (Pedregosa et al 2011;Bose et al 2024).…”

Section: Measurement Of the Coefficient Of Reflection At Zmentioning

confidence: 99%

Experimental Study of Alfvén Wave Reflection from an Alfvén-speed Gradient Relevant to the Solar Coronal Holes

Bose,

TenBarge,

Carter

et al. 2024

ApJ

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We report the first experimental detection of a reflected Alfvén wave from an Alfvén-speed gradient under conditions similar to those in coronal holes. The experiments were conducted in the Large Plasma Device at the University of California, Los Angeles. We present the experimentally measured dependence of the coefficient of reflection versus the wave inhomogeneity parameter, i.e., the ratio of the wavelength of the incident wave to the length scale of the gradient. Two-fluid simulations using the Gkeyll code qualitatively agree with and support the experimental findings. Our experimental results support models of wave heating that rely on wave reflection at low heights from a smooth Alfvén-speed gradient to drive turbulence.

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Section: Measurement Of the Coefficient Of Reflection At Zmentioning

confidence: 99%

Experimental Study of Alfvén Wave Reflection from an Alfvén-speed Gradient Relevant to the Solar Coronal Holes

Bose,

TenBarge,

Carter

et al. 2024

ApJ

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Laboratory Study of Collisionless Magnetic Reconnection

Ji,

Yoo,

Fox

et al. 2023

Space Sci Rev

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A concise review is given on the past two decades’ results from laboratory experiments on collisionless magnetic reconnection in direct relation with space measurements, especially by the Magnetospheric Multiscale (MMS) mission. Highlights include spatial structures of electromagnetic fields in ion and electron diffusion regions as a function of upstream symmetry and guide field strength, energy conversion and partitioning from magnetic field to ions and electrons including particle acceleration, electrostatic and electromagnetic kinetic plasma waves with various wavelengths, and plasmoid-mediated multiscale reconnection. Combined with the progress in theoretical, numerical, and observational studies, the physics foundation of fast reconnection in collisionless plasmas has been largely established, at least within the parameter ranges and spatial scales that were studied. Immediate and long-term future opportunities based on multiscale experiments and space missions supported by exascale computation are discussed, including dissipation by kinetic plasma waves, particle heating and acceleration, and multiscale physics across fluid and kinetic scales.

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Hamiltonian Model for Electron Heating by Electromagnetic Waves during Magnetic Reconnection with a Strong Guide Field

Sattin

2024

Symmetry

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Some recent published works have provided an exhaustive characterization of the plasma dynamics during magnetic reconnections in the presence of a magnetic guide field in MRX laboratory plasmas, including an assessment of the mechanisms that convert from magnetic energy to plasma kinetic energy. Among other results, the measurements indicate the existence of a correlation between the electron temperature and the generation of a spectrum of electric oscillations during the reconnection. In this work, we adapt to MRX conditions the well-known stochastic particle heating mechanism, frequently adopted in the astrophysical literature to justify ion heating by low-frequency large-amplitude electromagnetic waves. We show that, under MRX conditions. it may potentially provide a relevant contribution to electron energization.

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Conversion of Magnetic Energy to Plasma Kinetic Energy During Guide Field Magnetic Reconnection in the Laboratory

Cited by 3 publications

References 39 publications

Experimental Study of Alfvén Wave Reflection from an Alfvén-speed Gradient Relevant to the Solar Coronal Holes

Experimental Study of Alfvén Wave Reflection from an Alfvén-speed Gradient Relevant to the Solar Coronal Holes

Laboratory Study of Collisionless Magnetic Reconnection

Hamiltonian Model for Electron Heating by Electromagnetic Waves during Magnetic Reconnection with a Strong Guide Field

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