| Abstract: | The dynamics of formation of optical radiation in spectral lines in a longitudinal nanosecond helium discharge under conditions
of wave breakdown is investigated. A discharge tube with a diameter of 0.4 cm and a length of 50 cm was placed in a metallic
shield 1 cm in diameter. The gas pressure was varied within 1–60 torr for an amplitude of the voltage pulses of up to 50 kV.
Asymmetry of spontaneous radiation recorded from different ends of the discharge tube is detected. This is shown to be a consequence
of nonuniform distribution of the functions of the primary brightness of the flux and the absorption coefficient along the
tube length.
Dagestan State University, 43a, M. Gadzhiev Str., Makhachkala, 367025, Russia. Translated from Zhurnal Prikladnoi Spektroskopii,
Vol. 66, No. 3, pp. 415–420, May–June, 1999. |
