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Non-equilibrium Microwave Plasma for Efficient High Temperature Chemistry
Published on: August 1, 2017
Controlling hot electrons by wave amplification and decay in compressing plasma
P F Schmit1, I Y Dodin, N J Fisch
1Department of Astrophysical Sciences, Princeton University, New Jersey 08544, USA.
Physical Review Letters
|January 15, 2011
Summary
Researchers can control energy transfer to hot electrons in plasma by using a seeded Langmuir wave. This method allows for tunable energy deposition and broader electron velocity distributions.
Area of Science:
- Plasma Physics
- Computational Physics
Background:
- Plasma compression can convert mechanical energy into other forms.
- Controlling energy transfer to specific particle populations is crucial for plasma applications.
Purpose of the Study:
- To demonstrate controllable energy transfer from plasma compression to hot electrons.
- To investigate the role of Langmuir waves in this energy transfer process.
Main Methods:
- Particle-in-cell (PIC) simulations were employed.
- Plasma was preseeded with a Langmuir wave and subjected to compression.
- The dynamics of wave amplification, damping, and energy transfer were analyzed.
Main Results:
- A portion of mechanical energy was controllably transferred to hot electrons.
- Langmuir wave amplification occurred initially, followed by induced Landau damping.
- This process shaped electron velocity distributions over controllable intervals.
Conclusions:
- Seeding plasma with Langmuir waves offers a method for controlled energy transfer during compression.
- The technique enables tailored hot electron populations with wider velocity distributions.
- Independent energy deposition from multiple modes is achievable at prescribed times.
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