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The energy-based scaling of a thin current sheet: Case study.

Yu L Sasunov1, M L Khodachenko2, I I Alexeev3

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Investigating thin current sheets (TCSs), this study found that average plasma energy influences TCS half-thickness. The results align with theoretical models, confirming magnetic flux conservation in current carriers.

Keywords:
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Area of Science:

  • Space Physics
  • Plasma Physics
  • Astrophysics

Background:

  • Thin current sheets (TCSs) are crucial in space plasma dynamics.
  • Understanding TCS structure is key to interpreting phenomena like magnetic reconnection.

Purpose of the Study:

  • To investigate the influence of average plasma energy on the half-thickness of TCSs.
  • To compare observational data with theoretical scaling laws for TCSs.

Main Methods:

  • Utilized Cluster spacecraft magnetic field data for TCS observations.
  • Estimated TCS half-thickness (ℓ) and calculated scaling values (Z~).
  • Compared observed scaling values with theoretical scaling (Zμ).

Main Results:

  • The half-thickness (ℓ) of TCSs was estimated using magnetic field data.
  • Observed TCS scaling values (Z~ = ℓ/ρT) showed good agreement with theoretical scaling (Zμ = 22E~/T).
  • This agreement supports models assuming magnetic flux conservation for current carriers.

Conclusions:

  • Average plasma energy is a significant factor in determining TCS half-thickness.
  • Observational data validates theoretical predictions for TCS structure and dynamics.
  • The findings contribute to a better understanding of plasma behavior in thin current sheets.