Edge radiation in short-wavelength (extreme-UV and x-ray) free-electron lasers using classical and quantum interference

Sher Alam; Mohammed Obaidur Rahman; Cleo Bentley Jr.

doi:10.1117/12.376986

1 February 2000 Edge radiation in short-wavelength (extreme-UV and x-ray) free-electron lasers using classical and quantum interference

Sher Alam, Mohammed Obaidur Rahman, Cleo Bentley Jr.

Author Affiliations +

Proceedings Volume 3885, High-Power Laser Ablation II; (2000) https://doi.org/10.1117/12.376986
Event: Advanced High-Power Lasers and Applications, 1999, Osaka, Japan

Abstract

Ordinary Free-Electron Lasers (FEL's) can be found in successful operation in the spectral range from millimeters to ultraviolet wavelengths. However the operation of the common FEL's in the extreme ultraviolet and X-ray wavelength regimes faces certain adverse effects. Some of the main obstacles in the way of the realization of X-ray FEL are electron momentum spread and angular divergence. Another point to keep in mind is that ordinary FEL's work on the principle of `momentum population inversion.' By this one means that electrons with momenta larger than the resonant value contribute to the gain whereas electrons with momenta smaller than the resonant value contribute to the loss. Thus to ensure a net gain we need more electrons with momenta lying in the upper momentum domain than in the lower one, i.e. a `momentum population inversion.' To bypass these difficulties the idea of Lasing Without Inversion to achieve the successful operation of short-wavelength (extreme UV and X-ray) FEL's has been suggested by Scully and co-workers, which is an ingenious suggestion.

Citation Download Citation

Sher Alam, Mohammed Obaidur Rahman, and Cleo Bentley Jr. "Edge radiation in short-wavelength (extreme-UV and x-ray) free-electron lasers using classical and quantum interference", Proc. SPIE 3885, High-Power Laser Ablation II, (1 February 2000); https://doi.org/10.1117/12.376986

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