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Title: Slowing of magnetic reconnection concurrent with weakening plasma inflows and increasing collisionality in strongly-driven laser-plasma experiments

Journal Article · · Physical Review Letters
 [1];  [1];  [2];  [1];  [3];  [1];  [1];  [1]
  1. MIT (Massachusetts Inst. of Technology), Cambridge, MA (United States)
  2. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
  3. University of Rochester, Rochester, NY (United States). Laboratory for Laser Energetics.

An evolution of magnetic reconnection behavior, from fast jets to the slowing of reconnection and the establishment of a stable current sheet, has been observed in strongly-driven, β ≲ 20 laser-produced plasma experiments. This process has been inferred to occur alongside a slowing of plasma inflows carrying the oppositely-directed magnetic fields as well as the evolution of plasma conditions from collisionless to collisional. High-resolution proton radiography has revealed unprecedented detail of the forced interaction of magnetic fields and super-Alfvénic electron jets (Vjet~ 20VA) ejected from the reconnection region, indicating that two-fluid or collisionless magnetic reconnection occurs early in time. The absence of jets and the persistence of strong, stable magnetic fields at late times indicates that the reconnection process slows down, while plasma flows stagnate and plasma conditions evolve to a cooler, denser, more collisional state. These results demonstrate that powerful initial plasma flows are not sufficient to force a complete reconnection of magnetic fields, even in the strongly-driven regime.

Research Organization:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
NA0001857; NA0002035; 415935-G; 5-24431
OSTI ID:
1182197
Alternate ID(s):
OSTI ID: 1182431
Journal Information:
Physical Review Letters, Vol. 114, Issue 20; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 30 works
Citation information provided by
Web of Science

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Cited By (15)

Relativistic magnetic reconnection driven by a laser interacting with a micro-scale plasma slab journal April 2018
Particle acceleration in laser-driven magnetic reconnection journal April 2017
Astrophysical particle acceleration mechanisms in colliding magnetized laser-produced plasmas journal September 2017
Ion heating and magnetic flux pile-up in a magnetic reconnection experiment with super-Alfvénic plasma inflows journal April 2018
Regimes of magnetic reconnection in colliding laser-produced magnetized plasma bubbles journal September 2018
Kinetic simulation of magnetic field generation and collisionless shock formation in expanding laboratory plasmas journal October 2018
Field reconstruction from proton radiography of intense laser driven magnetic reconnection journal August 2019
Decomposition of plasma kinetic entropy into position and velocity space and the use of kinetic entropy in particle-in-cell simulations journal August 2019
Anomalous plasma acceleration in colliding high-power laser-produced plasmas journal September 2019
MPRAD: A Monte Carlo and ray-tracing code for the proton radiography in high-energy-density plasma experiments journal December 2019
Nuclear diagnostics for Inertial Confinement Fusion (ICF) plasmas journal January 2020
Non-Thermal Electron Energization from Magnetic Reconnection in Laser-Driven Plasmas text January 2016
Kinetic simulation of magnetic field generation and collisionless shock formation in expanding laboratory plasmas text January 2017
Ion heating and magnetic flux pile-up in a magnetic reconnection experiment with super-Alfvenic plasma inflows text January 2018
Anomalous plasma acceleration in colliding high-power laser-produced plasmas text January 2019

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