Is plasma frequency a maximum?

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SUMMARY

The plasma frequency, calculated using the equation ω = √(4πn e²/m), represents the frequency of oscillation of electrons in a plasma when perturbed. Under basic assumptions, particularly in a cold plasma scenario, electrons oscillate solely at this plasma frequency. However, this does not limit their ability to oscillate due to other influences such as sound waves and electromagnetic waves. The discussion clarifies that while the plasma frequency is a definitive measure, it is not the only frequency at which electrons can oscillate.

PREREQUISITES
  • Understanding of plasma physics concepts
  • Familiarity with the equation for plasma frequency
  • Knowledge of electron behavior in electromagnetic fields
  • Basic principles of oscillation and wave phenomena
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  • Study the effects of ion movement on plasma frequency
  • Explore non-linear effects in plasma dynamics
  • Investigate the interaction between plasma and electromagnetic waves
  • Learn about thermal motion in plasma and its impact on oscillation
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Physicists, electrical engineers, and students studying plasma physics or wave phenomena will benefit from this discussion.

Thierry12
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When i calculate a plasma frequency with the equation : ω=square root (4*pi*n*e^2/m)
are the electrons always of that frequency or is it a maximum that an electron can oscillate?
 
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The plasma frequency is the frequeny of oscillation of the electrons in a plasma when they are perturbed. They simply oscillate in space and only at the plasma frequency. This is a very simple motion and ignores a lot of things like ion movement, non-linear effects, and thermal movement. But under the basic assumptions and assuming a cold plasma then yes, the electrons only oscillate at this frequency but this does not preclude the electrons from oscillating due to sound waves, electromagnetic waves, etc. This is looking at a simple isolated phenomonon.
 

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