High-Current Vacuum Arc in a Strong Axial Magnetic Field

Author

Chaly, A.M. ; Logatchev, A.A. ; Zabello, K.K. ; Shkol´nik, S.M.

Author_Institution

IG Tavrida Electr., Moscow

Volume

1

fYear

2006

fDate

25-29 Sept. 2006

Firstpage

309

Lastpage

312

Abstract

The high-current vacuum arcs (HCVA) with high average current densities in axial magnetic fields (AMF) B_n les 1.2T were studied. The typical V-shape of volt-tesla characteristic (VTC) has been shown to retain in strong AMF and at raising the current density to 3 kA/cm²; the quantitative parameters change, though. It has been confirmed the conclusion of Chaly et al. (1999) that, in strong AMF, the cathode attachment size for an arc in a quasi stationary state is defined by AMF induction and arc length. The quantitative comparison of VTC and voltage of a low-current arc under the action of magnetic field, inclined to the arc axis (Chaly et al., 2006), encounters difficulties arising in describing of HCVA as an aggregate of independent cathode jets at moderate values of AMF induction

Keywords

magnetic field effects; vacuum arcs; AMF induction; cathode attachment size; high-current vacuum arc; independent cathode jets; quasistationary state; strong axial magnetic field; typical V-shape; volt-tesla characteristic; Cathodes; Coils; Current density; Electrodes; Magnetic field measurement; Magnetic fields; Photography; Vacuum arcs; Vacuum technology; Voltage measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Discharges and Electrical Insulation in Vacuum, 2006. ISDEIV '06. International Symposium on

Conference_Location

Matsue

ISSN

1093-2941

Print_ISBN

1-4244-0191-7

Electronic_ISBN

1093-2941

Type

conf

DOI

10.1109/DEIV.2006.357293

Filename

4194873