Amplifiers – Parametric amplifiers – Semiconductor type
Patent
1979-05-21
1981-02-24
Moskowitz, Nelson
Amplifiers
Parametric amplifiers
Semiconductor type
315 3, H01S 100
Patent
active
042530687
ABSTRACT:
A cyclotron maser microwave amplifier or oscillator which utilizes non-relativistic electrons (or other charged particles) in cyclotron motion and a spatially nonlinear electrostatic field. The term "spatially nonlinear electrostatic field" encompasses static electric fields whose magnitude can be described mathematically as varying in a nonlinear manner as a function of position in one or more directions. Completely non-relativistic electrons of very low energy may be used in principle for which phase bunching will occur due to the nonlinear motions (induced by the electrostatic field) resulting in stimulated emission of cyclotron radiation for use in the amplifier or oscillator. This is in complete contrast to the relativistic cyclotron maser (Hirschfield, U.S. Pat. No. 3,398,376) which required the electrons to be acting under the relativistic effect of the electron mass (and hence cyclotron frequency) being a function of its energy to produce the necessary phase bunching and resulting stimulated emission. This new means of cyclotron maser action, in principle, is induced by a variety of spatially nonlinear electrostatic fields.
REFERENCES:
patent: 3265978 (1966-08-01), Clavier et al.
patent: 3315173 (1967-04-01), Adler
patent: 3346819 (1967-10-01), Birdsall
patent: 3373309 (1968-03-01), Poschl et al.
patent: 3398376 (1968-08-01), Hirschfield
patent: 3441782 (1969-04-01), Arnaud
patent: 3487336 (1969-12-01), Kaufman
patent: 3708764 (1973-01-01), Guenord et al.
Barnett, "Cyclotron Maser . . . Electrostatic Field,"1978, pp. 1-107, Dissertation Abst. Int. B, 39(6), 2912.
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