Temporal and spatial structure of a runaway electron beam in air at atmospheric pressure

The time- and spatial structure of a runaway electron beam generated in air at atmospheric pressure by a high-voltage pulse with a rise time of ∼300 ps is studied experimentally and numerically. It is obtained that the duration of the runaway electron current is a few tens of picoseconds, and it can consist of two or many peaks. It is shown that the many-peak temporal structure of the beam is caused by the non-simultaneous appearance of several emission centers on the cathode edge.

[1]  Cheng Zhang,et al.  Diffuse discharge produced by repetitive nanosecond pulses in open air, nitrogen, and helium , 2013 .

[2]  V. Tarasenko,et al.  Two-component structure of the current pulse of a ranaway electron beam generated during electric breakdown of elevated-pressure nitrogen , 2012 .

[3]  G. Mesyats,et al.  Observation of the avalanche of runaway electrons in air in a strong electric field. , 2012, Physical review letters.

[4]  V. Tarasenko,et al.  Note: measurement of extreme-short current pulse duration of runaway electron beam in atmospheric pressure air. , 2012, The Review of scientific instruments.

[5]  D. Levko,et al.  Effect of explosive emission on runaway electron generation , 2012 .

[6]  Y. Krasik,et al.  Space- and time-resolved characterization of nanosecond time scale discharge at pressurized gas , 2011 .

[7]  Victor F. Tarasenko,et al.  Diffuse discharge, runaway electron, and x-ray in atmospheric pressure air in an inhomogeneous electrical field in repetitive pulsed modes , 2011 .

[8]  E. H. Baksht,et al.  Supershort avalanche electron beam generation in gases , 2008 .

[9]  D. Grote,et al.  The WARP Code: Modeling High Intensity Ion Beams , 2005 .

[10]  S. I. Yakovlenko,et al.  REVIEWS OF TOPICAL PROBLEMS: The electron runaway mechanism in dense gases and the production of high-power subnanosecond electron beams , 2004 .

[11]  Aleksandr V. Gurevich,et al.  Runaway breakdown and electric discharges in thunderstorms , 2001 .

[12]  L. Babich,et al.  REVIEWS OF TOPICAL PROBLEMS: High-voltage nanosecond discharge in a dense gas at a high overvoltage with runaway electrons , 1990 .