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Accession Number:
AD0612644
Title:
RESEARCH ON NOISE IN CROSSED-FIELD GUNS.
Corporate Author:
LITTON INDUSTRIES SAN CARLOS CALIF
Report Date:
1965-01-20
Abstract:
The experimental data for a very low noise injectedbeam crossed-field amplifier are given. Initially a noise-figure value of 3.5 with a small-signal gain of about 10 db and saturated power output of 14 watts was achieved. Under the best conditions a noise figure of 2.5 db with a small-signal gain of about 10.5 db and saturated power output of 18 watts has been achieved. A noise-figure reduction of several db is obtained by space-charge smoothing. The optimization of the various parameters in obtaining the low noise figure results is discussed. The dependence of the noise figure on the various parameters is investigated. The present lownoise amplifier has a noise transformer at the exit of the short Kino gun the presence of this transformer also provides a good control on the beam optics and results in low-noise-figure values. The effect of mismatch at the output is investigated. A small-signal analysis for an idealized ion- and electron-beam system seems to indicate that the presence of ions does not add to any crossed-field interaction. However, the presence of ions can lead to poor optics, which results eventually, in a large noise content in the beam. Author
Descriptive Note:
Quarterly rept. no. 6, 1 Oct-31 Dec 64,
Supplementary Note:
See also AD-608 594.
Pages:
0052
Contract Number:
NObsr89546
File Size:
0.00MB
