PT Journal
AU Gershenzon, EM
   Gol'tsman, GN
   Semenov, AD
TI Submillimeter backward wave tube spectrometer for measuring superconducting film transmission
SO Pribory i Tekhnika Eksperimenta
JI Pribory i Tekhnika Eksperimenta
PY 1983
BP 134
EP 137
VL 26
IS 5
LA Russian
DE BWO spectroscopy; spectrometer; transmission
AB A spectrometer employing six backward wave tubes is described. It is intended for investigation of superconductors in the 0.2-3 mm range of wave lengths. During the measurement of the transmission spectrum it is possible to determine the energy gap for superconduct1ng films 50 to 4000 A thick. The transmission factor can vary from 10-1 to 10-9. Spectrum of relation of film transmission factors in superconducting and normal states is measured for determining the energy gap 2 Δ. The transmission spectrum obtained by means of a computer for vanadium film 300 A thick is given as an example. The energy gap 2 Δ = 1.4 MeV
ER