Journal ArticleDOI
A Free Electron Laser Experiment
TLDR
In this article, the Free Electron Laser can be operated in either the stimulated Raman or stimulated Compton regime by changing the electron beam density, which can be used for diagnostics and characterization of the device.Abstract:
An experiment has been performed in which microwaves are generated by the interaction of a helical magnetic wiggler field with an electron beam. This Free Electron Laser can be operated in either the stimulated Raman or stimulated Compton regime by changging the electron beam density. The high repetition rate, and long pulse length of the electron beam facilitate diagnostics and the characterization of the device. To date, the device has been operated in the superradiant and oscillator Raman scattering mode. Preliminary results show an increase of 20 db in the oscillator mode with respect to the superradiant mode. The variations in the spectrum with wiggler field amplitude and electron beam density are shown.read more
Citations
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Journal ArticleDOI
Microwave studies of a tunable free‐electron laser in combined axial and wiggler magnetic fields
TL;DR: In this paper, measurements of narrow-band (Δω/ω≤0.02) microwave emission from a tunable (7≤ω/2π≤21 GHz) Raman free-electron laser operating in a single TE11 waveguide mode are reported.
Journal ArticleDOI
Gain Measurement on the ACO Storage Ring Laser
D. A. G. Deacon,J. M. J. Madey,K. E. Robinson,C. Bazin,M. Billardon,P. Elleaume,Y. Farge,Jean-Michel Ortega,Y. Petroff,M. Velghe +9 more
TL;DR: In this article, the first gain measurements on the free electron laser being assembled on the storage ring ACO were reported and the largest measured peak gain, averaged over the laser mode, is? = 4.3 × 10-4 per pass.
Journal ArticleDOI
End effects of a bifilar magnetic wiggler
TL;DR: In this article, the magnetic field at the entrance of a wiggler magnet in a free-electron laser (FEL) determines the character of the electron orbits and influences the FEL gain.
Journal ArticleDOI
A long-pulse millimeter-wave free electron maser
TL;DR: In this article, an experimental free electron maser (FEM) facility is described which operates in the millimeter-wave regime, and the experiment demonstrates that high gain and beam extraction efficiency can be obtained with low-current but high-quality electron beams.
Journal ArticleDOI
Design of a high power CW free electron maser
TL;DR: In this paper, a conceptual design for efficient operation of a free electron maser amplifier for fusion applications is presented, which operates in the strong pump regime, is CW with output frequencies in the 100 GHz range or higher, output power levels of up to 5MW and total efficiencies greater than 70%.
References
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Journal ArticleDOI
First Operation of a Free-Electron Laser
David A. G. Deacon,Luis R. Elias,John M. J. Madey,G. J. Ramian,H.A. Schwettman,Todd I. Smith +5 more
TL;DR: A free-electron laser oscillator has been operated above threshold at a wavelength of 3.4 µm as discussed by the authors, where µm is the number of free electrons in a single photon.
Journal ArticleDOI
Observation of Stimulated Emission of Radiation by Relativistic Electrons in a Spatially Periodic Transverse Magnetic Field
TL;DR: In this article, a tunable high-power free-electron laser with a relativistic electron beam in a constant spatially periodic transverse magnetic field has been demonstrated, achieving a gain of 7% per pass at an electron current of 70 mA.
Observation of stimulated emission of radiation by relativistic electrons in a spatially periodic transverse magnetic field
TL;DR: In this paper, gain has been observed at 10.6 micrometers due to stimulated emission of radiation by relativistic electrons in a spatially periodic transverse magnetic field.