Gas-discharge source of the noncarcinogenic UV radiation based on the mixture of helium and heavy-water (D$_2$O) vapor

The spectrum of radiation and the results of optimization are presented for a UV lamp that works on the He–D$_2$O mixture and is pumped using a repetitively pulsed barrier discharge. The dependences of the radiation intensity of the OD ($X$–$A$) band with the wavelength $\lambda\approx$ 309 nm on the partial pressure of the heavywater vapor, working voltage across the working capacitor of the high-voltage modulator, and repetition rate of the current pulses are studied.