Efficiency enhancement and optical guiding in a tapered high-power finite-pulse free-electron laser

Journal Article · Mon Jan 08 04:00:00 EST 1990 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.64.180· OSTI ID:6949364

Hafizi, B; Ting, A; Sprangle, P; Tang, C M ^[1]

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1. Beam Physics Branch, Plasma Physics Division, Naval Research Laboratory, Washington, D.C. 20375-5000 (US)

We compare the radiation output from simulations of a finite-pulse high-power laser for several tapering rates. A fast taper leads to a tenfold increase in efficiency as compared to a slow taper, with little change in peak radiation intensity. The enhanced power for fast tapering rates is due to an increase in the optical pulse cross section, brought about by a reduction in refractive guiding. This is analyzed by an envelope equation for the radiation beam. For the tapering rates leading to the highest powers, the optical pulse is virtually free of sideband modulation.

• OSTI ID: 6949364
• Journal Information: Physical Review Letters; (USA), Journal Name: Physical Review Letters; (USA) Vol. 64:2; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
426002* -- Engineering-- Lasers & Masers-- (1990-)
AUGMENTATION
COMPUTER CODES
CORRELATIONS
DATA
EFFICIENCY
EQUATIONS
FREE ELECTRON LASERS
INFORMATION
LASERS
MODULATION
NUMERICAL DATA
OPTICAL PROPERTIES
OPTICS
PHYSICAL PROPERTIES
POTENTIALS
POWER
PULSES
REFRACTIVITY
SIMULATION
THEORETICAL DATA
TIME DEPENDENCE
VECTOR FIELDS
WAVE FORMS