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Numerical simulations of runaway electron generation in pressurized gases
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10.1063/1.3675527
/content/aip/journal/jap/111/1/10.1063/1.3675527
http://aip.metastore.ingenta.com/content/aip/journal/jap/111/1/10.1063/1.3675527
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

The sequence of numerical simulations.

Image of FIG. 2.
FIG. 2.

(Color online) (a),(b) Potential distribution in the CA gap and (c),(d) distributions of charge densities of electrons and ions and electric field at different times of the accelerating pulse; T = 2 ns, ϕ 0  = 120 kV, P = 105 Pa, N2 gas.

Image of FIG. 3.
FIG. 3.

(Color online) (a)–(b) Distributions of charge densities of electrons and ions at time of the virtual cathode formation; T = 2 ns, ϕ 0  = 120 kV, P = 105 Pa, N2 gas.

Image of FIG. 4.
FIG. 4.

(Color online) (a) Summarized EEDF in the cathode-anode gap at different times, (b) EEDF at the anode at different times, (c) the maximum electrons energy obtained in the CA gap; T = 2 ns, ϕ 0  = 120 kV, P = 105 Pa, N2 gas.

Image of FIG. 5.
FIG. 5.

(Color online) (a) Time dependence of dn em /dt in N2-filled diode, in vacuum coaxial diode and calculated using Fowler–Nordheim law, (b) time dependence of electric field at the cathode surface for the same as in (a) diodes, (c) comparison between EEDF in N2-filled diode and in vacuum coaxial diode at t = 500 ps, (d) comparison of experimental results with results of simulations; T = 2 ns, ϕ 0  = 120 kV, P = 105 Pa.

Image of FIG. 6.
FIG. 6.

(Color online) Time dependences of (a) emitted dn em /dt and (b) total dn e /dt at different amplitudes of the cathode potential; T = 2 ns and P = 105 Pa, N2 gas.

Image of FIG. 7.
FIG. 7.

(Color online) (a) Time dependence of RAE dn e /dt (total number of electrons with ɛ e ≥ 1 keV) at different amplitudes of cathode potential, (b) EEDF-2 at the anode for different amplitudes of the cathode potential at t = 500 ps; T = 2 ns, P = 105 Pa, N2 gas.

Image of FIG. 8.
FIG. 8.

(Color online) (a) Time dependence of the RAE dn RAE /dt for different values of T, (b) integrated EEDF at the anode for different values of T at time T/4, (c) integrated EEDF at the anode for different values of T at time T/2; ϕ 0  = 120 kV, P = 105 Pa, N2 gas.

Image of FIG. 9.
FIG. 9.

(Color online) (a) Potential distribution at different gas pressures at t = 250 ps, (b) potential distribution for P = 3 × 105 Pa, (c) EEDF at the anode for different N2 gas pressure at t = 250 ps; ϕ 0  = 60 kV, T = 1 ns.

Image of FIG. 10.
FIG. 10.

(Color online) (a) Time dependence of emitted dn em /dt and RAE dn RAE /dt in He as working gas, (b) comparison between EEDF on anode in He in N2 at 500 ps, (c) potential distribution in He at different times; T = 2 ns, ϕ 0  = 120 kV, P = 105 Pa.

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/content/aip/journal/jap/111/1/10.1063/1.3675527
2012-01-06
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Numerical simulations of runaway electron generation in pressurized gases
http://aip.metastore.ingenta.com/content/aip/journal/jap/111/1/10.1063/1.3675527
10.1063/1.3675527
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