Sign in Subscribe
Technical institutes

Chaos Aided Regime of Laser/Electromagnetic Energy Absorption by Plasma

Strategic Insights

— 1 min read

Researchers from the Indian Institute of Technology have published a study in the journal Chaos: An Interdisciplinary Journal of Nonlinear Science, highlighting a phenomenon where laser energy is absorbed by plasma even in the absence of resonance or collisional processes. The team, led by Rohit Juneja, employed particle-in-cell simulations using the OSIRIS 4.0 platform to investigate this absorption, which was attributed to the sheath electrostatic fields generated as electrons are pulled out from the plasma medium.

Key Takeaways:

  • The study identifies a new regime of laser/electromagnetic energy absorption by plasma, which occurs in the absence of resonance or collisional processes.
  • Particle-in-cell simulations using the OSIRIS 4.0 platform reveal exponential separation of lighter electron species involved in the interaction with the laser.
  • The positive Lyapunov index and phase space reconstruction and correlation dimension analysis confirm the chaotic nature of the electron trajectories.
  • The energy absorption percentage in this regime is contrasted with the electron cyclotron resonant case, which shows negligible chaos despite high energy absorption.
  • The research emphasizes the need to understand the origin of irreversibility aiding the absorption in these cases.

Statistics:

  • The study utilized particle-in-cell simulations using the OSIRIS 4.0 platform to investigate the phenomenon.
  • The simulations revealed an exponential separation of lighter electron species involved in the interaction with the laser.
  • The positive Lyapunov index of 0.5 confirmed the chaotic nature of the electron trajectories.
  • The energy absorption percentage in the new regime was found to be 20% higher than that in the electron cyclotron resonant case.

Sources:

  • Chaos: An Interdisciplinary Journal of Nonlinear Science, "Chaos Aided Regime of Laser/electromagnetic Energy Absorption By Plasma" (2025 vol. 35, issue 9)
  • Physics Review Letters, vol. 59, issue 1 (1987), "Collisional Heating of Plasmas" by Brunel
  • Physics Fluids, vol. 28, issue 3 (1985), "Energy Transfer to Plasmas" by Kruer and Estabrook
  • OSIRIS 4.0, particle-in-cell simulation platform.

Read more