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Free-electron laser as a driver for a resonant cavity at 35 GHz
1CEA/Centre d'Etudes Scientifiques et Techniques d'Aquitaine, BP 2, 33114 Le Barp, France.
Physical Review Letters
|October 4, 2000
Summary
High-power relativistic electron beams were bunched using a free-electron laser, achieving over 100 MW output. Subsequent extraction and cavity interaction yielded 10 MW microwave power, validating theoretical predictions.
Area of Science:
- Physics
- Engineering
Background:
- Free-electron lasers (FELs) are capable of generating high-power electron beams.
- Microwave generation and extraction are critical for various applications.
Purpose of the Study:
- To bunch a relativistic electron beam using a free-electron laser.
- To extract microwave power from the bunched beam interacting with a resonant cavity.
Main Methods:
- Utilized a free-electron laser to bunch an 800 A, 6.7 MeV relativistic electron beam at 35 GHz.
- Extracted the bunched beam and passed it through a resonant cavity.
- Measured microwave power extracted from the cavity.
Main Results:
- Achieved output power levels exceeding 100 MW from the free-electron laser.
- Extracted 10 MW of microwave power from the resonant cavity.
- Observed reasonable agreement between experimental results and theoretical power calculations.
Conclusions:
- Demonstrated successful bunching of relativistic electron beams with a free-electron laser.
- Validated the capability of extracting significant microwave power from bunched electron beams.
- Confirmed the predictive power of simple formulas for beam-cavity interactions.