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Numerical study of laser wake field generated by two colliding laser beams
1Advanced Photon Research Center, Japan Atomic Energy Research Institute, Umemidai 8-1, Kizu-cyo, Souraku-gun, Kyoto-fu 619-0215, Japan.
Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|December 12, 2001
Summary
Numerical simulations show that colliding laser beams can generate enhanced laser wake fields. A counterpropagating laser pulse significantly boosts wake field amplitude, increasing it by an order of magnitude.
Area of Science:
- Plasma Physics
- Laser-Plasma Interactions
- Computational Physics
Background:
- Laser wake field acceleration is a promising technique for particle acceleration.
- Standard wake fields generated by single laser pulses have limitations in amplitude.
- Investigating methods to enhance wake field generation is crucial for advancing the technology.
Purpose of the Study:
- To numerically study the laser wake field generated by two colliding laser beams.
- To investigate the enhancement mechanism using a counterpropagating long pulse laser.
- To examine the characteristics of the enhanced wake field at saturation.
Main Methods:
- Numerical simulations of laser wake field generation.
- Analysis of wake field amplitude dependence on laser parameters.
- Examination of wake field behavior under wave-breaking conditions.
Main Results:
- An order of magnitude enhancement in wake field amplitude was achieved using a counterpropagating laser pulse with an appropriate frequency difference.
- The enhanced wake field amplitude scales with pumping laser intensities up to the wave-breaking limit.
- Detailed characteristics of the saturated enhanced wake field were analyzed.
Conclusions:
- Colliding laser beams, particularly with a specific counterpropagating pulse, offer a significant enhancement pathway for laser wake fields.
- The findings provide insights into optimizing laser wake field generation for potential applications in particle acceleration.