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High current vacuum arcs are essentially metal vapor arcs, and the contact material has a direct impact on the vacuum arcs. The objective of this paper is to experimentally determine the anode spot threshold current of vacuum arcs subjected to axial magnetic fields for four pure metals in vacuum arcs. The four pure metals are W, Mo, Cr, and Fe, which covers a wide range of thermal and electrical parameters...
Contact materials have a significant impact on the anode spot phenomenon in vacuum arcs. The objective of this paper is to investigate the anode spot threshold current subjected to axial magnetic fields (AMFs) for Cr and Mo materials. The experiments were performed in a demountable vacuum chamber, in which a Helmholtz coil was set coaxially with a pair of butt-type contacts to supply axial magnetic...
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