Computer simulation of low-energy high-current electron beam dynamics in a long plasma-filled diode
Results of computer simulation of low-energy high-current electron beam dynamics in a low-impedance system consisting of a diode with a long plasma anode, just siding with an explosive emission cathode and an auxiliary thermionic cathode are presented. Plasma anode plays simultaneously a role of t...
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| Date: | 2008 |
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| Main Authors: | , |
| Format: | Article |
| Language: | English |
| Published: |
Національний науковий центр «Харківський фізико-технічний інститут» НАН України
2008
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| Series: | Вопросы атомной науки и техники |
| Subjects: | |
| Online Access: | http://dspace.nbuv.gov.ua/handle/123456789/111394 |
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| Journal Title: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Cite this: | Computer simulation of low-energy high-current electron beam dynamics in a long plasma-filled diode / A.V. Agafonov, V.P. Tarakanov // Вопросы атомной науки и техники. — 2008. — № 3. — С. 136-138. — Бібліогр.: 8 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| Summary: | Results of computer simulation of low-energy high-current electron beam dynamics in a low-impedance system
consisting of a diode with a long plasma anode, just siding with an explosive emission cathode and an auxiliary
thermionic cathode are presented. Plasma anode plays simultaneously a role of the transport channel providing
charge neutralization of high-current beam and is created by means of the residual gas ionisation by low-current,
low-voltage electron beam emitted from the auxiliary cathode in an external longitudinal magnetic field. The main
peculiarities of the beam-plasma system are discussed: 1) the formation of the beam of currents exceeding the
limiting Alven’s ones; 2) the formation of paramagnetic states of the beam under condition of beam charge density
close to the plasma density. These peculiarities complicate beam-plasma interaction significantly due to sharp nonuniform
distribution of the beam current density, significant transverse motion of the beam electrons and
redistribution of ion plasma density under the influence of high-current electron beam fields. Computer simulation
was performed using electromagnetic PIC code KARAT. |
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