A forevacuum pulse arc-discharge-based plasma electron source

Казаков, А. В.; Бурдовицин, В. А.; Medovnik, A. V.; Окс, Е. М.

doi:10.1134/s0020441213060043

Cited by 26 publications

(10 citation statements)

References 5 publications

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“…Under such grossly changing and often aggressive gas conditions in the vacuum chamber, it is more appropriate to use a plasma electron emitter in which electrons are emitted from the plasma of an arc discharge with a cathode spot initiated, e.g., by an insulator flashover [1]. An undeniable advantage of this type of emitters is their wide operating pressure range: from high vacuum [2], when an arc operates in cathode material vapors, to forevacuum [3]. Pressure variation, as a rule, exerts no effect on the arc discharge current but strongly affects the emission properties of a plasma emitter and electron beam current transport.…”

Section: Introductionmentioning

confidence: 99%

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Low energy electron beam transport with a space charge lens

Gushenets

Goncharov

Dobrovolskiy

et al. 2014

2014 International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)

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Pulsed electron beams with high (1÷100 J/cm2) energy density are used in various processes involved in structural and functional modification of surface properties of materials and products. One of the main problems of successful electron beam application is to develop reliable and efficient methods of transport and manipulation of electron beams with high energy density. The paper presents new experimental and theoretical research results on wide-aperture (diameter 6 cm) lowenergy (up to 40 kV) high-current (up to 100 A) electron beams focused and manipulated with a space-charge lens.

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Section: Introductionmentioning

confidence: 99%

“…Wave of electron emitter discharge current (1), electron emission (2) and electron beam(3). Vertical scale for discharge and emission current -20 A/div, beam current -10 A/div Wave of electron beam current for different accelerating voltage and electron emitter discharge current (Id).…”

mentioning

confidence: 99%

Low energy electron beam transport with a space charge lens

Gushenets

Goncharov

Dobrovolskiy

et al. 2014

2014 International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)

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“…Interest in the generation of pulsed electron beams at forevacuum pressures is dominated by the possibility of their use for the surface treatment of dielectric (insulating) materials, in particular, ceramics [2]. This kind of e-beam source often utilizes a hollow-cathode glow discharge [3] and cathodic arc discharge [4] for plasma formation. The use of a cathodic arc, with its associated cathode spots, follows from the frequent need to increase the electron beam current.…”

Section: Introductionmentioning

confidence: 99%

Pulsed Cathodic Arc for Forevacuum-Pressure Plasma-Cathode Electron Sources

Казаков

Medovnik

Бурдовицин

et al. 2015

IEEE Trans. Plasma Sci.

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We describe properties and parameters of a pulsed cathodic arc discharge, as applied in forevacuum-pressure plasma-cathode electron sources for the generation of broad electron beams. It is shown that during a single arc current pulse, the arc can operate in either of two modes, differing in their discharge operating voltage and plasma constitution. The radial plasma density distribution approximates a Gaussian. The effect of gas pressure on the plasma density is pronounced only at a considerable distance from the cathode.Index Terms-Cathode spots, cathodic arc, forevacuum, plasma-cathode electron source. and a Senior Physicist and Leader of the Department of Plasma Sources with the High Current Electronics Institute, Siberian Branch of the Russian Academy of Sciences. He has authored or co-authored over 200 papers in the area of basic phenomena in low-pressure gaseous discharges and vacuum arc plasmas, charged particle, emission from low-temperature plasma, ion sources and plasma electron guns, and a range of plasma applications.

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“…A special place among electron sources is occupied by devices with grid plasma cathodes [2,[7][8][9], which are presently almost the only emissive structures capable of generating wide electron beams of submillisecond duration with a number of clear advantages over traditional thermionic and explosive emission cathodes with respect to both physical parameters and operational properties. Grid/layer stabilization of the cathode/emission plasma boundaries in devices with grid plasma cathodes makes it possible to realize independent control of the main parameters of electron beam (electron energy, beam current amplitude, pulse duration, and repetition rate), which facilitates the search for optimum regimes of irradiation in a broad range of these parameters [10][11][12][13]. In view of these properties of beam sources with a plasma cathode, we have performed simulations [14] and obtained theoretical estimates that confirmed the possibility of generating pulsed beams of millisecond duration with controlled power variation during the pulse.…”

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confidence: 99%

Dynamic Power Control of a Submillisecond Pulsed Megawatt Electron Beam in a Source with a Plasma Cathode

et al. 2021

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We describe a method for dynamic power control of a submillisecond pulsed electron beam in a "SOLO" type source with plasma cathode. The beam power is controlled by dynamic variation of the beam current amplitude with the corresponding low-inertia change in the concentration of emissive plasma. This method can be used to generate submillisecond electron beams of variable power (up to 10 MW at a maximum variation rate not exceeding 0.5 W/μs)-in particular, for the processing of various metallic materials with modification of their functional properties by controlled beam energy supply to the material surface.

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A forevacuum pulse arc-discharge-based plasma electron source

Cited by 26 publications

References 5 publications

Low energy electron beam transport with a space charge lens

Low energy electron beam transport with a space charge lens

Pulsed Cathodic Arc for Forevacuum-Pressure Plasma-Cathode Electron Sources

Dynamic Power Control of a Submillisecond Pulsed Megawatt Electron Beam in a Source with a Plasma Cathode

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