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Hollow Plasma Acceleration Driven by a Relativistic Reflected Hollow Laser
W P Wang1, C Jiang1,2,3, H Dong1,3
1State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science, Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences (CAS), Shanghai 201800, China.
Physical Review Letters
|August 4, 2020
Summary
Researchers generated a relativistic hollow laser using a novel high-reflectivity phase mirror, overcoming optical modulator damage. This new method enables efficient hollow plasma drilling and acceleration for advanced applications.
Area of Science:
- Plasma Physics
- Laser Science
- Astrophysics
Background:
- Generating relativistic Laguerre-Gaussian lasers is challenging due to optical modulator damage.
- Existing methods face limitations in producing high-intensity hollow lasers.
Purpose of the Study:
- To develop a new experimental scheme for generating relativistic hollow lasers.
- To achieve hollow plasma drilling and acceleration using the novel laser.
Main Methods:
- Utilized a femtosecond petawatt laser system with a high-reflectivity phase mirror.
- Employed a simple optical model for verification.
- Conducted particle-in-cell simulations to validate experimental results.
Main Results:
- Successfully generated a relativistic hollow laser at an intensity of 6.3×10^19 W/cm² for the first time.
- Experimentally achieved hollow plasma drill and acceleration.
- Verified vortex laser generation in the new scheme.
Conclusions:
- The new scheme provides a convenient method for producing relativistic hollow lasers at high repetition rates.
- This advancement facilitates hollow plasma acceleration for applications in radiation sources, fusion energy, and astrophysical research.
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