High-efficiency extraction of microwave radiation from a tapered-wiggler free-electron laser

Journal Article · Mon Oct 27 04:00:00 EST 1986 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.57.2172· OSTI ID:6908899

Orzechowski, T J; Anderson, B R; Clark, J C; Fawley, W M; Paul, A C; Prosnitz, D; Scharlemann, E T; Yarema, S M; Hopkins, D B; Sessler, A M

We have substantially increased the output power and extraction efficiency of a free-electron laser operating at 34.6 GHz by tapering the wiggler magnetic field. In the exponential-gain regime, the laser exhibited a measured gain of 34 dB/m. With a 50-kW input signal, the amplifier saturated in 1.3 m with a 180-MW output signal. By using a taper that brought the magnetic field at the end of the wiggler down to 45% of its initial (peak) value, we increased the output signal to 1.0 GW. This corresponds to an extraction efficiency of 34%.

• Research Organization: Lawrence Livermore National Laboratory, Livermore, California
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6908899
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 57:17; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
AMPLIFICATION
AUGMENTATION
DATA
EFFICIENCY
ELECTRICAL EQUIPMENT
ELECTROMAGNETIC RADIATION
ELECTROMAGNETS
EQUIPMENT
EXPERIMENTAL DATA
FREE ELECTRON LASERS
FREQUENCY RANGE
GAIN
GHZ RANGE
GHZ RANGE 01-100
INFORMATION
LASERS
MAGNETIC FIELDS
MAGNETS
MICROWAVE RADIATION
NUMERICAL DATA
POWER
RADIATIONS
SIMULATION
WIGGLER MAGNETS