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Anomalous heating and plasmoid formation in a driven magnetic reconnection experiment

Journal Article · · Physical Review Letters
 [1];  [1];  [1];  [2];  [3];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [4];  [5];  [6];  [7]
  1. Imperial College, London (United Kingdom)
  2. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  3. PSL Reserch Univ., Paris (France)
  4. Imperial College, London (United Kingdom); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  5. Northwest Institute of Nuclear Technology, Xi'an (China)
  6. Xi'an Jiaotong Univ., Shaanxi (China)
  7. China Academy of Engineering Physics, Mianyang (China)
We present a detailed study of magnetic reconnection in a quasi-two-dimensional pulsed-power driven laboratory experiment. Oppositely directed magnetic fields (B=3 T), advected by supersonic, sub-Alfvénic carbon plasma flows (Vin = 50 km/s), are brought together and mutually annihilate inside a thin current layer (δ = 0.6 mm). Temporally and spatially resolved optical diagnostics, including interferometry, Faraday rotation imaging, and Thomson scattering, allow us to determine the structure and dynamics of this layer, the nature of the inflows and outflows, and the detailed energy partition during the reconnection process. We measure high electron and ion temperatures (Te = 100 eV, Ti = 600 eV), far in excess of what can be attributed to classical (Spitzer) resistive and viscous dissipation. Finally, we observe the repeated formation and ejection of plasmoids, consistent with the predictions from semicollisional plasmoid theory.
Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-07NA27344; SC0001063
OSTI ID:
1347671
Alternate ID(s):
OSTI ID: 1344617
Report Number(s):
LLNL-JRNL--704068
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 8 Vol. 118; ISSN 0031-9007; ISSN PRLTAO
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (12)

An experimental platform for pulsed-power driven magnetic reconnection journal May 2018
Ion heating and magnetic flux pile-up in a magnetic reconnection experiment with super-Alfvénic plasma inflows journal April 2018
Anomalous plasma acceleration in colliding high-power laser-produced plasmas journal September 2019
Influence of 3D plasmoid dynamics on the transition from collisional to kinetic reconnection journal July 2019
GLIDER—A pulsed-current generator for laboratory astrophysics x-ray absorption experiments journal February 2020
Interactions of magnetized plasma flows in pulsed-power driven experiments journal December 2019
Exploring astrophysics-relevant magnetohydrodynamics with pulsed-power laboratory facilities journal April 2019
Fast Ion Heating in Transient Collisionless Magnetic Reconnection via an Intrinsic Stochastic Mechanism journal November 2018
Kinetic Verification of the Stochastic Ion Heating Mechanism in Collisionless Magnetic Reconnection journal December 2019
Ion heating and magnetic flux pile-up in a magnetic reconnection experiment with super-Alfvenic plasma inflows text January 2018
Interactions of magnetized plasma flows in pulsed-power driven experiments text January 2019
Anomalous plasma acceleration in colliding high-power laser-produced plasmas text January 2019

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