Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983hpgm.rept.....a&link_type=abstract
Unknown
Astronomy and Astrophysics
Astrophysics
Infrared Radiation, Microwave Emission, Plasma-Electromagnetic Interaction, Relativistic Electron Beams, Wave Generation, Astrophysics, Compton Effect, Free Electron Lasers, Oscillator Strengths, Plasma Density, Space Environment Simulation, Space Simulators
Scientific paper
An existing device, designed to explore astrophysical processes, emits high intensity broadband radiation into an angular cone of some 15 deg width. The total energy radiated in photons per 100 nsec beam pulse is approximately 100 J, at a wall plug efficiency of 0.1%. A single relativistic electron beam is used both to set up the plasma wave wiggler (via a two stream instability) and to radiate high frequency photons as in an FEL. It is suggested that two beams be used, roughly oppositely directed, and both interacting with a stationary plasma. The second beam of substantially slower velocity, can be either electrons or ions; its role is to set up the wiggler which then stimulates the relativistic electrons to radiate. This improves the kinematic control of photon emission, allowing both for higher frequencies and narrower angular spread of the radiation. Tactics are discussed for modulating the second beam so as to emphasize a narrow range of wiggler wavelengths.
Abarbanel Henry D. I.
Cornwall John M.
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