Effect of explosive emission on runaway electron generation

The results of numerical simulations of the generation of runaway electrons in a nitrogen-filled coaxial diode with electron emission governed by field emission that transfers to explosive emission with a variable time delay are presented. It is shown that the time when the explosive emission turns on influences significantly the generation of runaway electrons. Namely, an explosive emission turn-on prior to the formation of the virtual cathode leads to an increase in the current amplitude of the runaway electrons and a decrease in its duration. Conversely, an explosive emission turn-on after the formation of the virtual cathode and during the high-voltage pulse rise time does not influence the generation of runaway electrons significantly. When the explosive emission turns on during the fall of the high-voltage pulse and after the virtual cathode formation, one obtains additional runaway electron generation. Finally, a comparison between electron energy distributions obtained with and without explosive e...

[1]  D. Levko,et al.  Numerical simulations of runaway electron generation in pressurized gases , 2011, 1109.3537.

[2]  D. Levko,et al.  Numerical simulation of anomaleous electrons generation in a vacuum diode , 2011 .

[3]  G. Mesyats,et al.  Limitation of runaway electron beam duration in air-filled gap with inhomogeneous field , 2011 .

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

[5]  V. V. Ryzhov,et al.  Effect of cathode emissivity on runaway electron beam formation in gas-filled diode with inhomogeneous electric field , 2011 .

[6]  G. Mesyats,et al.  On the Nature of Picosecond Runaway Electron Beams in Air , 2009, IEEE Transactions on Plasma Science.

[7]  G. Mesyats,et al.  Generation of a Picosecond Runaway Electron Beam in a Gas Gap With a Nonuniform Field , 2008, IEEE Transactions on Plasma Science.

[8]  G. Mesyats.  On a source of outgoing electrons in a pulsed gas discharge , 2007 .

[9]  S. Starikovskaia,et al.  Plasma assisted ignition and combustion , 2006 .

[10]  Yukikazu Itikawa,et al.  Cross Sections for Electron Collisions with Nitrogen Molecules , 2006 .

[11]  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 .

[12]  A. Bogaerts,et al.  Electron anisotropic scattering in gases: a formula for Monte Carlo simulations. , 2002, Physical review. E, Statistical, nonlinear, and soft matter physics.

[13]  S. Starikovskaia,et al.  Numerical modelling of the electron energy distribution function in the electric field of a nanosecond pulsed discharge , 2001 .

[14]  L. Vasilyak,et al.  Propagation of fast ionization wave through electronegative gas (chlorine) , 2000 .

[15]  S. V. Kostyuchenko,et al.  Fast ionisation waves under electrical breakdown conditions , 1994 .

[16]  Iu. P. Raizer.  Gas Discharge Physics , 1991 .

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

[18]  David B. Graves,et al.  Electron heating in low‐pressure rf glow discharges , 1990 .

[19]  Tzeng,et al.  Stochastic development of an electron avalanche. , 1986, Physical review. A, General physics.

[20]  G. Mesyats,et al.  REVIEWS OF TOPICAL PROBLEMS: Field emission and explosive electron emission processes in vacuum discharges , 1983 .

[21]  B. Slavin,et al.  Breakdown of a neutral gas by ionizing waves of the gradient of a negative potential , 1992 .