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Investigation of Early Plasma Evolution Induced by Ultrashort Laser Pulses
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Observation of kinetic plasma jets in a coronal-loop simulation experiment.

S K P Tripathi1, P M Bellan, G S Yun

  • 1Applied Physics, California Institute of Technology, Pasadena, CA 91125, USA.

Physical Review Letters
|May 16, 2007
PubMed
Summary

Laboratory simulations reveal that intense kinetic plasma jets can erupt from coronal plasma loops. This occurs due to a particle orbit instability in helical magnetic fields, ejecting ions with high countercurrent axial velocity.

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Area of Science:

  • Plasma physics
  • Astrophysics
  • Solar physics

Background:

  • Coronal plasma loops are structures in the Sun's atmosphere.
  • Laboratory simulations are used to study plasma phenomena.
  • Particle orbit instabilities can lead to complex plasma behaviors.

Purpose of the Study:

  • To investigate the mechanism behind kinetic plasma jet formation.
  • To understand the role of magnetic fields and particle velocity in jet ejection.
  • To model coronal plasma loop dynamics in a laboratory setting.

Main Methods:

  • Conducting laboratory simulations of coronal plasma loops.
  • Employing analytic models to describe particle behavior.
  • Utilizing numerical models to simulate plasma dynamics.

Main Results:

  • Observed intense kinetic plasma jets emerging from simulated coronal plasma loops.
  • Identified a particle orbit instability in helical magnetic fields as the cause.
  • Demonstrated that magnetic forces eject ions with sufficient countercurrent axial velocity.

Conclusions:

  • Kinetic plasma jets are generated by particle orbit instabilities.
  • Helical magnetic fields and ion velocity are critical factors in jet formation.
  • Laboratory simulations provide insights into solar atmospheric phenomena.