Experimental Study of Magnetic Reconnection in Partially Ionized Plasmas Using Rotating Magnetic Field

Takahata, Y.; Yanai, Ryoma; Inomoto, Michiaki

doi:10.1585/pfr.14.3401054

Cited by 5 publications

(6 citation statements)

References 14 publications

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“…A new experiment was recently developed at the University of Tokyo to investigate reconnection in a plasma with an ionization fraction of less than 1% [73,219]. Instead of using inductive torus breakdown, they use a rotating magnetic field (RMF) technique to create the plasma configuration.…”

Section: Experiments On Magnetic Reconnection In Partially Ionized Plasmasmentioning

confidence: 99%

“…A new experiment was recently developed at the University of Tokyo to investigate reconnection in a plasma with an ionization fraction of less than 1% [73,219]. Instead of using The systematic uncertainty is of the order of approximately 10 km s −1 and would lead to an overall shift in the vertical scale.…”

Section: Experiments On Magnetic Reconnection In Partially Ionized Pl...mentioning

confidence: 99%

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Magnetic reconnection in partially ionized plasmas

Murphy

et al. 2020

Proc. R. Soc. A.

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Magnetic reconnection has been intensively studied in fully ionized plasmas. However, plasmas are often partially ionized in astrophysical environments. The interactions between the neutral particles and ionized plasmas might strongly affect the reconnection mechanisms. We review magnetic reconnection in partially ionized plasmas in different environments from theoretical, numerical, observational and experimental points of view. We focus on mechanisms which make magnetic reconnection fast enough to compare with observations, especially on the reconnection events in the low solar atmosphere. The heating mechanisms and the related observational evidence of the reconnection process in the partially ionized low solar atmosphere are also discussed. We describe magnetic reconnection in weakly ionized astrophysical environments, including the interstellar medium and protostellar discs. We present recent achievements about fast reconnection in laboratory experiments for partially ionized plasmas.

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Section: Experiments On Magnetic Reconnection In Partially Ionized Plasmasmentioning

confidence: 99%

“…A new experiment was recently developed at the University of Tokyo to investigate reconnection in a plasma with an ionization fraction of less than 1% [73,219]. Instead of using The systematic uncertainty is of the order of approximately 10 km s −1 and would lead to an overall shift in the vertical scale.…”

Section: Experiments On Magnetic Reconnection In Partially Ionized Pl...mentioning

confidence: 99%

Magnetic reconnection in partially ionized plasmas

Murphy

et al. 2020

Proc. R. Soc. A.

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“…Burch et al, 2016;Torbert et al, 2018;Chen et al, 2020;Hesse and Cassak, 2020) and laboratory experiments (e.g. Dong et al, 2012;Gekelman et al, 2016;Olson et al, 2016;Howes, 2018;Takahata, Yanai, and Inomoto, 2019;Seo et al, 2020), such studies will advance our fundamental understanding of the energetics of solar and astrophysical reconnection, determining how the energy is partitioned between bulk flows and random motions, between plasma acceleration and heating (Ji and Daughton, 2011;Coates, 2016;Yamada, Yoo, and Myers, 2016).…”

Section: What Is the Three-dimensional Geometry Of The Magnetic Field Near Reconnection Sites? What Roles Do Ion-neutral Collisions Currementioning

confidence: 99%

Critical Science Plan for the Daniel K. Inouye Solar Telescope (DKIST)

Rast¹,

González²,

Rubio³

et al. 2021

Sol Phys

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The National Science Foundation’s Daniel K. Inouye Solar Telescope (DKIST) will revolutionize our ability to measure, understand, and model the basic physical processes that control the structure and dynamics of the Sun and its atmosphere. The first-light DKIST images, released publicly on 29 January 2020, only hint at the extraordinary capabilities that will accompany full commissioning of the five facility instruments. With this Critical Science Plan (CSP) we attempt to anticipate some of what those capabilities will enable, providing a snapshot of some of the scientific pursuits that the DKIST hopes to engage as start-of-operations nears. The work builds on the combined contributions of the DKIST Science Working Group (SWG) and CSP Community members, who generously shared their experiences, plans, knowledge, and dreams. Discussion is primarily focused on those issues to which DKIST will uniquely contribute.

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“…However, multifluid simulations have not observed this transition 129,130,132 . Most existing experiments can only access the regime L L in and have shown that fast, multifluid reconnection does occur 133,134 . The reconnection electric field was found to scale as E ∼ BV A such that neutrals remain important even at small scales 133 .…”

Section: Multiscale Reconnection In Partially Ionized Plasmasmentioning

confidence: 99%

Magnetic reconnection in the era of exascale computing and multiscale experiments

Ji,

Daughton,

Jara-Almonte

et al. 2022

Preprint

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Astrophysical plasmas have the remarkable ability to preserve magnetic topology, which inevitably gives rise to the accumulation of magnetic energy within stressed regions including current sheets. This stored energy is often released explosively through the process of magnetic reconnection, which produces a reconfiguration of the magnetic field, along with high-speed flows, thermal heating, and nonthermal particle acceleration. Either collisional or kinetic dissipation mechanisms are required to overcome the topological constraints, both of which have been predicted by theory and validated with in situ spacecraft observations or laboratory experiments. However, major challenges remain in understanding magnetic reconnection in large systems, such as the solar corona, where the collisionality is weak and the kinetic scales are vanishingly small in comparison to macroscopic scales. The plasmoid instability or formation of multiple plasmoids in long reconnecting current sheets is one possible multiscale solution for bridging this vast range of scales, and new laboratory experiments are poised to study these regimes. In conjunction with these efforts, we anticipate that the coming era of exascale computing, together with the next generation of observational capabilities, will enable new progress on a range of challenging problems, including the energy build-up and onset of reconnection, partially ionized regimes, the influence of magnetic turbulence, and particle acceleration.Website summary: Magnetic reconnection explosively releases stored magnetic energy in astrophysical plasmas. Thanks to advances in observations, exascale computing and multiscale experiments, it will be possible to solve outstanding physics problems, including the immense separation between global and dissipation scales, reconnection onset, and particle acceleration.

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Experimental Study of Magnetic Reconnection in Partially Ionized Plasmas Using Rotating Magnetic Field

Cited by 5 publications

References 14 publications

Magnetic reconnection in partially ionized plasmas

Magnetic reconnection in partially ionized plasmas

Critical Science Plan for the Daniel K. Inouye Solar Telescope (DKIST)

Magnetic reconnection in the era of exascale computing and multiscale experiments

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