Abstract:
The electrical and luminescent characteristics of a barrier-discharge lamp filled with a Kr/CCl$_4$ (150: 1) mixture are experimentally studied versus the value of pd, which varies in the range (7.6–14) $\times$ 10$^3$ Pa cm. When simulating the gas discharge using similarity parameters, the following relationships are fulfilled: for $pd = \operatorname{const}$ ($p$ is the pressure, $d$ is the interelectrode distance), the pulse duration and the mean current density are $\tau_j\sim 1/p$ and $\langle j\rangle\sim p$; the surface charge density on the electrodes, $\sigma\sim\operatorname{const}$; the duration of the UV radiation pulse and the efficiency of UV radiation due to a KrCl$^*$ (222 nm) exciplex, $\tau_{\mathrm{rad}}\sim 1/p$ and $\eta\sim p^2$. The maximal radiation efficiency achieved in the experiments is about 13%. Deviations from the similarity laws for the gas discharge are related to the filamentary form of the observed discharge. Qualitative analysis indicates that similarity laws may be fulfilled for such a form of discharge as well but locally, within a single filament.
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