Pulsed volume discharge in a nonuniform electric field at a high pressure and the short leading edge of a voltage pulse

Optical Properties of Runaway Electron Preionized Diffuse Discharges and Their Applications for Excilamps and Lasers

“…A runaway electrons preionized diffuse discharge was used for pumping different gas lasers [6], for creation VUV and UV excilamps [14][15][16], and for modification and cleaning of metal surfaces [17]. We suppose that REP DD will have widespread use in different fields.…”

“…In five recent years, interest in this discharge mode has been rekindled [5][6][7][8][9][10][11][12][13]. It was found that atmospheric-pressure discharges in an inhomogeneous electric field feature a number of unique properties; in particular the specific input power can reach ≈ 800 MW/cm 3 at the gap center [6]. Another peculiarity of the runaway electrons preionized diffuse discharge (REP DD) is that its ignition is slightly affected by the polarity of a nanosecond voltage pulse [7].…”

“…Apparently, this is due to the subnanosecond time of the processes occurring in the REP DD gap and thus to the complexity of nanosecond and subnanosecond high--voltage pulsers and measurements of discharge and runaway e-beam characteristics. In five recent years, interest in this discharge mode has been rekindled [5][6][7][8][9][10][11][12][13]. It was found that atmospheric-pressure discharges in an inhomogeneous electric field feature a number of unique properties; in particular the specific input power can reach ≈ 800 MW/cm 3 at the gap center [6].…”

“…Another peculiarity of the runaway electrons preionized diffuse discharge (REP DD) is that its ignition is slightly affected by the polarity of a nanosecond voltage pulse [7]. A diffuse discharge with a voltage risetime of tens of nanoseconds was obtained in [8], and a diffuse discharge with a voltage of tens of kilovolts was realized in [6]. In the batch mode, the REP DD retained its properties at high repetition rate, e.g., up to 3 kHz [9].…”

Modification of the near-surface layers of a copper foil under the action of a volume gas discharge in air at atmospheric pressure

“…Another feature of volume discharges in inhomogeneous electric fields, which are initiated by ultrashort avalanche electron beams (UAEBs), is the possibility of reaching high levels of specific power (up to 800 MW/cm 3 [8]) deposited in the discharge. In such regimes, runaway electron beams emitted from the discharge plasma are characterized by the beam current amplitudes reaching tens and hundreds of amperes (behind the foil), while the current pulse duration (defined as the pulse full width at half maximum, FWHM) does not exceed 100 ps [9].…”