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Transition from wakefield generation to soliton formation
Amol R Holkundkar1, Gert Brodin2
1Department of Physics, Birla Institute of Technology and Science - Pilani, Rajasthan 333031, India.
Physical Review. E
|May 16, 2018
Summary
Short laser pulses in plasma create wakefields, but high densities suppress this. This study examines the transition to quasi-solitons, finding maximum energy loss at 10% critical density before suppression.
Area of Science:
- Plasma Physics
- Nonlinear Optics
- Laser-Plasma Interactions
Background:
- Short laser pulses propagating in underdense plasmas generate wakefields.
- Wakefield generation is suppressed at plasma densities near critical density, leading to electromagnetic pulse (EM-pulse) self-modulation.
Purpose of the Study:
- To investigate the transition from wakefield generation to quasi-soliton formation as plasma density increases.
- To analyze the impact of plasma density on EM-pulse energy loss and wakefield dynamics.
Main Methods:
- Utilized a one-dimensional relativistic cold fluid model.
- Validated findings through comparison with particle-in-cell simulations.
Main Results:
- Maximum energy loss of the EM-pulse due to wakefield generation occurs at approximately 10% of the critical plasma density.
- Wakefield generation is significantly suppressed at higher plasma densities.
Conclusions:
- The study elucidates the transition in laser-plasma interactions from wakefield generation to quasi-soliton formation with increasing plasma density.
- Understanding these density-dependent dynamics is crucial for controlling laser energy deposition in plasmas.
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