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Titolo:
Plasma sources for high-current electron beam generation
Autore:
Krasik, YE; Dunaevsky, A; Felsteiner, J;
Indirizzi:
Technion Israel Inst Technol, Dept Phys, IL-32000 Haifa, Israel Technion Israel Inst Technol Haifa Israel IL-32000 L-32000 Haifa, Israel
Titolo Testata:
PHYSICS OF PLASMAS
fascicolo: 5, volume: 8, anno: 2001,
parte:, 2
pagine: 2466 - 2472
SICI:
1070-664X(200105)8:5<2466:PSFHEB>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
ION EMISSION; CATHODE; FERROELECTRICS; SURFACE; DIODE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
15
Recensione:
Indirizzi per estratti:
Indirizzo: Krasik, YE Technion Israel Inst Technol, Dept Phys, IL-32000 Haifa, IsraelTechnion Israel Inst Technol Haifa Israel IL-32000 fa, Israel
Citazione:
Y.E. Krasik et al., "Plasma sources for high-current electron beam generation", PHYS PLASMA, 8(5), 2001, pp. 2466-2472

Abstract

A review of experimental studies of the operation of cathodes made of metal-ceramic, velvet, corduroy, carbon fibers, carbon fabric, and different types of ferroelectrics is presented. These cathodes operated at electric fields in the range of 5-60 kV/cm that allowed the generation of electron beams with duration of several hundreds of nanoseconds while keeping a quasi-constant diode impedance. All cathodes had the same diameter and were tested in a diode powered by a high-voltage generator (300 kV, 85 Omega, 250 ns, less than or equal to5 Hz). It was shown that the source of electrons for all the studied cathodes is a plasma which is formed as a result of surface discharges. Different types of electrical and optical diagnostics were used to study the formation and parameters of the plasma, the potential distribution inside the anode-cathode gap, and the uniformity and divergence of theextracted electron beam as a function of the amplitude and rise time of the accelerating pulse. Results of the lifetime of the tested cathodes and their compatibility with vacuum requirements are presented as well. (C) 2001 American Institute of Physics.

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Documento generato il 22/09/20 alle ore 23:48:12