Charge state, angular distribution, and kinetic energy of ions from multicomponent-cathodes in vacuum arc devices

Abstract

Articles you may be interested inExperimentally established correlation between ion charge state distributions and kinetic ion energy distributions in a direct current vacuum arc discharge J. Appl. Phys. 117, 093301 (2015); 10.1063/1.4914301 Effect of Ti-Al cathode composition on plasma generation and plasma transport in direct current vacuum arc Role of metallic neutrals and gaseous molecular ions in a copper cathodic arc operated with oxygen gas

Time-resolved ion energy and charge state distributions in pulsed cathodic arc plasmas of Nb−Al cathodes in high vacuum

“…For multi-element cathodes, the available literature does not specifically take into account time dependencies and their consequences to ion properties, e.g. in [9,[15][16][17][18][19][20].…”

On plasma jet formation in vacuum arc with composite cathode

“…Results discussed in this section are obtained for arc plasma with composite cathode Zn 0.4 Pb 0.6 . For this cathode the following initial values are used: initial velocity for Zn -1.15*10 6 cm/s, for Pb -0.55*10 6 cm/s [3]; charge state composition for Zn -80% Zn+1, 20% Zn+2, for Pb -36% Pb+1, 64% Pb+2 [3]; specific erosion for Zn -54.5 g/C, for Pb -172.8 g/C [6]; ion temperature -0.5 eV for all types; electron temperature -2.5 eV [2].…”

“…This plasma is used for various technical applications [2]. In particular, the vacuum-arcproduced metal plasma is used in ion sources [3][4][5][6] to produce intense ion beams for ion implantation, in plasma generator for coating deposition and in high-current interrupters [7,8]. In order to produce the multielement ion beam or to form the composite metal coating the vacuum-arc-produced plasma from composite multicomponent cathode is used.…”

“…Recently, it has been found [3,4] that ion angular distributions in the plasma jet of vacuum arc are different for the various ion types. Moreover, the angular distribution of ions in the plasma arc with a pure (single component) cathode differs from the angular distribution for the same type of ions in an arc with the composite cathode [3].…”

“…A suitable choice in this case is to use a hybrid model [8], which describes the electron subsystem as a massless fluid, but ions are described as macroparticles with the help of the particle-in-cell approach. Thus, the motivation of the present work is to try to reconstruct the experimental [3,4] ion angular distributions with the help of the newly developed hybrid model, which is able to simulate the separate jets of multicomponent plasma from cathode spots, the mixing of the jet and the common plasma column.…”