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Proceedings Paper

Edge radiation in short-wavelength (extreme-UV and x-ray) free-electron lasers using classical and quantum interference
Author(s): Sher Alam; Mohammed Obaidur Rahman; Cleo Bentley
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Paper 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.

Paper Details

Date Published: 1 February 2000
PDF: 11 pages
Proc. SPIE 3885, High-Power Laser Ablation II, (1 February 2000); doi: 10.1117/12.376986
Show Author Affiliations
Sher Alam, Electrotechnical Lab. (Japan)
Mohammed Obaidur Rahman, KEK High Energy Accelerator Research Org. (Japan)
Cleo Bentley, Prairie View A&M Univ. (United States)

Published in SPIE Proceedings Vol. 3885:
High-Power Laser Ablation II
Claude R. Phipps; Masayuki Niino, Editor(s)

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