UV Radiation of High-Voltage Multi-Electrode Surface Discharge in Gaseous Medium
- PDF / 939,716 Bytes
- 6 Pages / 612 x 792 pts (letter) Page_size
- 42 Downloads / 130 Views
MA RADIATION
UV Radiation of High-Voltage Multi-Electrode Surface Discharge in Gaseous Medium A. M. Anpilova, E. M. Barkhudarova, Yu. N. Kozlovb, c, I. A. Kossyia, M. A. Misakyand, I. V. Moryakova,*, M. I. Taktakishvilia, N. M. Tarasovaa, and S. M. Temchina a Prokhorov b
General Physics Institute of the Russian Academy of Sciences, Moscow, 119991 Russia Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow, 119991 Russia c Plekhanov Russian University of Economics, Moscow, 117997 Russia d National Research University Higher School of Economics, Moscow, 101000 Russia *e-mail: [email protected] Received August 15, 2018; revised September 20, 2018; accepted September 20, 2018
Abstract―UV radiation of high-voltage pulsed multispark surface discharge in atmospheric-pressure air in the spectral range of 200–380 nm was investigated. The discharge was a sequence of microplasma objects with a specific energy deposition of ~1 kJ/cm3 and electron density of 1017 cm–3. Copper and stainless steel were used as the electrode materials. It is found that lines of atoms and ions of the electrode material dominate in the discharge UV spectrum. The UV radiation intensity was measured using the actinometry technique. The UV radiation efficiency relative to the energy deposited in the discharge is found to be ~1%. DOI: 10.1134/S1063780X19020016
1. INTRODUCTION High-voltage pulsed multispark surface (HVPMSS) discharge has been used to solve a number of applied problems in the field of plasma chemistry [1], ignition of combustible mixtures [2, 3], and gas dynamics [4, 5]. A distinctive feature of such a discharge is that it is a sequence of microplasma objects with a high specific energy deposition. According to [6], microplasma is defined as a plasma medium with characteristic dimensions in the range from a few microns to several millimeters. There can exist three-dimensional, two-dimensional (flat), and one-dimensional (linear) microplasma objects. Their small spatial scales make it possible to create new research trends in the field of physics and chemistry. Due to the increased ratio of the surface area to the volume, microplasma can exist at high pressures and densities. It is also an efficient light-emitting and reactive medium. To produce microplasma, different types of electric discharges are used: dc, pulsed, RF, and microwave discharges. In this study, microplasma was produced by means of an HVPMSS discharge. An important factor typical of the discharge device under study is intense UV radiation. The first results on the spectral composition of HVPMSS radiation were presented in [7]. It was shown that, in the spectral range of 200–380 nm, the lines of atoms and ions of
the electrode material dominate in the spectrum. The radiation spectrum is almost independent of the kind of gaseous medium (air, argon, nitrogen, etc.). The main goal of this study was to quantitatively study UV radiation in the spectral range of 200 nm < λ < 380 nm from an HVPMSS discharge operating in atmospheric-pressure air by using the
Data Loading...
