Optical emission spectrum of filamentary nanosecond surface dielectric barrier dischargeстатья
Статья опубликована в высокорейтинговом журнале
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 27 февраля 2017 г.
Аннотация:Streamer–to–filament transition is a general feature of high pressure high voltage nanosecond surface dielectric barrier discharges. The transition is studied experimentally using time- and space–resolved optical emission in UV and visible parts of spectra. The discharge was initiated by high–voltage pulses 20 ns in duration and 2 ns rise time, positive or negative polarity, 20 - 60 kV in amplitude on the HV electrode. The experiment were carried out in a single-shot regime at initial pressures P > 3 bar and ambient initial temperature in air, N2, H2 : N2 and O2 : Ar mixtures. It was shown that the transition to filamentary mode is accompanied by appearance of intense continuous radiation and broad atomic lines. Electron density calculated from line broadening is characterized by high absolute values and long decay in the afterglow. Possible reasons of continuous spectra were analyzed.