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Author
Gershenzon, E. M.
;
Gol'tsman, G. N.
;
Mirskii, G. I.
Title
Submillimeter backward-wave-tube spectrometer-relaxometer
Type
Journal Article
Year
1987
Publication
Pribory i Tekhnika Eksperimenta
Abbreviated Journal
Pribory i Tekhnika Eksperimenta
Volume
30
Issue
4
Pages
131-137
Keywords
BWO, applications
Abstract
A backward-wave-tube (BWT) spectrometer-relaxometer is described that is designed for study of the relaxation characteristics of photoconductors in the wavelength range of 2-0.25 mm – in particular, to measure the relaxation times of the submillimeter photoconductivity of germanium in the range of 10[sup:-4]-10[sup:-9] sec and to determine from these data the concentration of compensating impurities of from 10[sup:10] to 10[sup:14] cm[sup:-3]. The instrument uses the beats of the oscillations of two BWTs and records the amplitude-frequency response of the specimen with variation of the beat frequency from 10[sup:4] to 10[sup:8] Hz with accumulation of the desired signal for less than or equal to1 sec by means of a quadrature synchronous detector. The beat frequency is stabilized and the quadrature voltages of the synchronous detector are formed by means of phase-locked loops.
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Russian
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no
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1699
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