Light Source with a Thermoionic Cathode |
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| Authors: | V I Arkhipenko S M Zgirovskii L V Simonchik G F Stel'makh |
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| Institution: | (1) Institute of Molecular and Atomic Physics, National Academy of Sciences of Belarus, 70 F. Skorina Ave., Minsk, 220072, Belarus;(2) Belarusian State University, Minsk, Belarus |
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| Abstract: | A light source with a thermoionic cathode has been investigated in helium at atmospheric pressure; the spectral radiance of the light source in the range 200–800 nm and the cathode temperature (3510 K) have been determined. Its employment as a light source in absorption spectroscopy for determination of the concentration of triplet and singlet metastable helium atoms in an atmospheric-pressure glow discharge has been demonstrated. The total concentration of metastable atoms was  3.5·1013 cm–3. |
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| Keywords: | light source arc discharge metastable atom |
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