Abstract
Accumulation of electrons in course of transportation of tubular high-current electron beam in a coaxial diode with magnetic insulation was studied in the situation of counterstream electron motion occurring due to the formation of a virtual cathode. Accumulation of electrons in these flows is accompanied by gradual increase in their relative energy spread and simultaneous decrease in the maximum kinetic energy. The process is described analytically and confirmed in numerical modeling. The theory is an extension of the known theory of coaxial magnetically insulated diode (based on the conservation of axial component of the generalized momentum) taking into account the spread of electron energies. The numerical modeling employed the KARAT electromagnetic PiC-code. Experiments were performed using high-current electron accelerator SINUS-7 (pulsewidth 50 ns) in the range of diode voltages 350 - 800 kV, magnetic fields 8 - 24 kOe, electron beam currents 2 - 12 kA. A gradual increase of potential of the electron beam between the explosive-emission cathode and the virtual cathode was observed, which accompanies accumulation of circulating electrons as predicted in theory.
| Original language | English |
|---|---|
| Article number | 012018 |
| Journal | Journal of Physics: Conference Series |
| Volume | 552 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2014 |
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ASJC Scopus subject areas
- Physics and Astronomy(all)
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Annular electron beam with virtual cathode in a coaxial diode with magnetic insulation. / Grishkov, A. A.; Kurkan, I. K.; Pegel, I. V.
In: Journal of Physics: Conference Series, Vol. 552, No. 1, 012018, 2014.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Annular electron beam with virtual cathode in a coaxial diode with magnetic insulation
AU - Grishkov, A. A.
AU - Kurkan, I. K.
AU - Pegel, I. V.
PY - 2014
Y1 - 2014
N2 - Accumulation of electrons in course of transportation of tubular high-current electron beam in a coaxial diode with magnetic insulation was studied in the situation of counterstream electron motion occurring due to the formation of a virtual cathode. Accumulation of electrons in these flows is accompanied by gradual increase in their relative energy spread and simultaneous decrease in the maximum kinetic energy. The process is described analytically and confirmed in numerical modeling. The theory is an extension of the known theory of coaxial magnetically insulated diode (based on the conservation of axial component of the generalized momentum) taking into account the spread of electron energies. The numerical modeling employed the KARAT electromagnetic PiC-code. Experiments were performed using high-current electron accelerator SINUS-7 (pulsewidth 50 ns) in the range of diode voltages 350 - 800 kV, magnetic fields 8 - 24 kOe, electron beam currents 2 - 12 kA. A gradual increase of potential of the electron beam between the explosive-emission cathode and the virtual cathode was observed, which accompanies accumulation of circulating electrons as predicted in theory.
AB - Accumulation of electrons in course of transportation of tubular high-current electron beam in a coaxial diode with magnetic insulation was studied in the situation of counterstream electron motion occurring due to the formation of a virtual cathode. Accumulation of electrons in these flows is accompanied by gradual increase in their relative energy spread and simultaneous decrease in the maximum kinetic energy. The process is described analytically and confirmed in numerical modeling. The theory is an extension of the known theory of coaxial magnetically insulated diode (based on the conservation of axial component of the generalized momentum) taking into account the spread of electron energies. The numerical modeling employed the KARAT electromagnetic PiC-code. Experiments were performed using high-current electron accelerator SINUS-7 (pulsewidth 50 ns) in the range of diode voltages 350 - 800 kV, magnetic fields 8 - 24 kOe, electron beam currents 2 - 12 kA. A gradual increase of potential of the electron beam between the explosive-emission cathode and the virtual cathode was observed, which accompanies accumulation of circulating electrons as predicted in theory.
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UR - http://www.scopus.com/inward/citedby.url?scp=84911406331&partnerID=8YFLogxK
U2 - 10.1088/1742-6596/552/1/012018
DO - 10.1088/1742-6596/552/1/012018
M3 - Article
AN - SCOPUS:84911406331
VL - 552
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
SN - 1742-6588
IS - 1
M1 - 012018
ER -