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The paper reports on a mass-charge spectrometry study of ion beams extracted from the plasma of a vacuum arc discharge with a compound lanthanum hexaboride cathode. The elemental composition of the ion beams was analyzed using a magnetic separator. The vacuum arc operated in repetitive pulsed mode with a current amplitude of 140 A, full width at the base of ∼350 μs, and frequency of 2 Hz. The ion-extracting...
The generation of highly charged metal ions in vacuum arc plasmas is of interest to plasma physicists because of the possibility to extract new data on the ionization in cathode spots. In practical terms, e.g., in metal ion sources, increasing the ion charge provides a proportional increase in ion energy at a given accelerating voltage. In the last two decades, various techniques have been used to...
The angular distribution of the metal and gaseous ion flow from vacuum arc plasma has been investigated. A Mevva-type ion source and a Time-of-Flight (TOF) mass-spectrometer were used. The experiments were performed using a range of different cathode materials, including C, Al, Zn, Cu, Ti, Co, Cr, W, Pb, Cu0.7Cr0.3, W0.4Co0.17C0.43, and Zn0.4Pb0.6, over a range of vacuum arc discharge parameters....
High charge state heavy metal ion beams have been formed by high power microwave heating of vacuum arc plasma confined in magnetic traps. Two types of magnetic traps were investigated, one a simple mirror configuration and the other a cusp configuration with inherent “minimum-B” structure. Pulsed high power (>100 kW) gyrotrons with frequency 37.5 GHz and 75 GHz were used for heating the vacuum...
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