%0 Journal Article
%T Submillimeter backward-wave-tube spectrometer-relaxometer
%A Gershenzon, E. M.
%A Gol'tsman, G. N.
%A Mirskii, G. I.
%J Pribory i Tekhnika Eksperimenta
%D 1987
%V 30
%N 4
%G Russian
%F Gershenzon_etal1987
%O exported from refbase (https://db.rplab.ru/refbase/show.php?record=1699), last updated on Fri, 28 May 2021 21:29:52 -0500
%X 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.
%K BWO
%K applications
%U https://www.osti.gov/biblio/6473035
%P 131-137