Study of the microscopic characteristics of a repetitive microsecond barrier discharge

Dynamics of structure of pulsed discharge in nitrogen and argon at different pressures in a "pin to plane" gap

“…Thus, the presence of a discharge microstructure in nitrogen and argon both at high and low pressures should be indicated as the main result of the studies. Previously, the microstructure was discovered and studied in various types of discharges in air [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25], which, unlike the gases used here, is electrically negative. The data obtained in this work, in particular, show that the electronegativity of the gas is not a necessary condition for the microstructure formation.…”

“…its realization in a narrow range of conditions. At the same time, the microstructure was found in many types of discharges: in diffuse form of discharges in the gap " rod−plane", " wire parallel to the plane" [11,14,15,18]; barrier and spark discharges in geometry " pin−plane" and in homogeneous gaps [12,[16][17][18][19][20][21][22][23][24][25]; in a streamerless discharge in a homogeneous gap [13]. Note, however, that all of these discharges are realized in air at atmospheric pressure.…”

“…Despite a long period of research, a number of gasdischarge phenomena remain poorly understood. They include the discharge microstructure [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25], when the current channel is a set of a large number of microchannels (filaments). The microstructure was detected during discharges in air at atmospheric pressure: initially by the autograph method on the surface of a flat electrode [11][12][13][14][15][16][17][18], then by shadow and interference methods of high spacetime resolution in the volume of the discharge gap [18][19][20][21][22][23][24][25].…”

“…They include the discharge microstructure [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25], when the current channel is a set of a large number of microchannels (filaments). The microstructure was detected during discharges in air at atmospheric pressure: initially by the autograph method on the surface of a flat electrode [11][12][13][14][15][16][17][18], then by shadow and interference methods of high spacetime resolution in the volume of the discharge gap [18][19][20][21][22][23][24][25]. Especially note that the microchannel structure against the background of the discharges glow was unresolvable by optical and electron-optical methods [19].…”

Features of the cathode plasma formation at the initial stage of a nanosecond spark discharge in air

“…One of them is associated with the presence of a microchannel structure of the discharge current and its participation in gas discharge processes in dense gases. Microstructured discharges were obtained both in theoretical [22][23][24][25][26][27][28] and in experimental studies in the interaction area of channels with electrodes [29][30][31][32][33][34] and in the volume image recoded by shadow photography [35][36][37][38]. It should be noted that the internal structure of (a) E-mail: gb-r@gmail.com the current channel against a background of a luminous outer shell was not resolved when optical and electronoptical methods were used [13,16,17,29,30,33].…”