Supershort avalanche electron beam generation in N2 and He at quasi-continuous gap voltage

Generation of a supershort avalanche e-beam (SAEB) in nitrogen and helium at quasi-continuous gap voltage has been shown. SAEB duration at generator voltage of 25 kV is ∼200 ps at a half-height, and its delay time with respect to the voltage pulse risetime may be tens of nanoseconds. The beam current waveforms, having several subnanosecond peaks have been recorded. It was established that at SAEB generation the gap voltage is decreasing by 10–20%. The change in oscillating mode of beam current of fast electrons in a gas-filled diode at He and N2 pressure decay was registered. Duration of the beam current of the fast electrons in an impulse increased up to several nanoseconds, and the impulse had two peaks on the osciloscope trace.

[1]  V. Tarasenko,et al.  High-current-density subnanosecond electron beams formed in a gas-filled diode at low pressures , 2006 .

[2]  V. Tarasenko.  Nanosecond discharge in air at atmospheric pressure as an x-ray source with high pulse repetition rates , 2006 .

[3]  S. I. Yakovlenko,et al.  High-power subnanosecond beams of runaway electrons and volume discharge formation in gases at atmospheric pressure , 2005 .

[4]  Victor F. Tarasenko,et al.  Supershort electron beam from air filled diode at atmospheric pressure , 2005 .

[5]  S. B. Alekseev,et al.  Luminescence of crystals under the action of a subnanosecond electron beam , 2005 .

[6]  S. B. Alekseev,et al.  Atmospheric-pressure CO2 laser with an electron-beam-initiated discharge produced in a working mixture , 2003 .

[7]  A. Sorokin.  The effect of compensation currents of the open discharge , 2003 .

[8]  S. I. Yakovlenko,et al.  On the mechanism of the runaway of electrons in a gas: The upper branch of the self-sustained discharge ignition curve , 2003 .

[9]  V. Tarasenko,et al.  Forming of an Electron Beam and a Volume Discharge in Air at Atmospheric Pressure , 2003 .

[10]  W. Byszewski,et al.  X-ray diagnostics of runaway electrons in fast gas discharges , 1982 .

[11]  J. R. Wayland,et al.  A Search for X Rays from Helium and Air Discharges at Atmospheric Pressure , 1968 .

[12]  V. L. Highland,et al.  Observation of X-rays from spark discharges in a spark chamber , 1966 .

[13]  M. Yalandin,et al.  Dynamics of subnanosecond electron beam formation in gas-filled and vacuum diodes , 2006 .