Magnetic reconnection between colliding magnetized laser-produced plasma plumes

G. Fiksel, W. Fox, A. Bhattacharjee, D. H. Barnak, P. Y. Chang, K. Germaschewski, S. X. Hu, P. M. Nilson

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Abstract

Observations of magnetic reconnection between colliding plumes of magnetized laser-produced plasma are presented. Two counterpropagating plasma flows are created by irradiating oppositely placed plastic (CH) targets with 1.8-kJ, 2-ns laser beams on the Omega EP Laser System. The interaction region between the plumes is prefilled with a low-density background plasma and magnetized by an externally applied magnetic field, imposed perpendicular to the plasma flow, and initialized with an X-type null point geometry with B=0 at the midplane and B=8T at the targets. The counterflowing plumes sweep up and compress the background plasma and the magnetic field into a pair of magnetized ribbons, which collide, stagnate, and reconnect at the midplane, allowing the first detailed observations of a stretched current sheet in laser-driven reconnection experiments. The dynamics of current sheet formation are in good agreement with first-principles particle-in-cell simulations that model the experiments.

Original languageEnglish (US)
Article number105003
JournalPhysical review letters
Volume113
Issue number10
DOIs
StatePublished - Sep 4 2014

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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    Fiksel, G., Fox, W., Bhattacharjee, A., Barnak, D. H., Chang, P. Y., Germaschewski, K., Hu, S. X., & Nilson, P. M. (2014). Magnetic reconnection between colliding magnetized laser-produced plasma plumes. Physical review letters, 113(10), [105003]. https://doi.org/10.1103/PhysRevLett.113.105003