Title :
Low-pressure switching plasmas stabilized by an axial magnetic field
Author :
Romheld, M. ; Teichmann, Jörg ; Hartmann, Werner
Author_Institution :
Corporate Technol., Siemens AG, Erlangen, Germany
Abstract :
An axial magnetic field has been used in conjunction with a low-pressure pulsed switching plasma in order to reduce contact erosion in high-current applications. For a pulse duration of 28 μs and current amplitudes of up to 50 kA the plasma expands quickly into a diffuse mode. Radial expansion velocity increases with current and reaches up to 10 km/s at 53 kA. With increasing current, a constricted plasma is superimposed onto the expanded diffuse part
Keywords :
discharges (electric); magnetic fields; plasma instability; plasma switches; pulsed power switches; axial magnetic field; contact erosion reduction; current amplitudes; diffuse mode; hydrogen; low pressure discharges; low-pressure switching plasmas stabilisation; plasma expansion; pulse duration; pulsed power switches; radial expansion velocity; Cathodes; Electrodes; Hydrogen; Magnetic field measurement; Magnetic fields; Magnetic sensors; Magnetic switching; Plasma measurements; Switches; Voltage;
Conference_Titel :
Discharges and Electrical Insulation in Vacuum, 1998. Proceedings ISDEIV. XVIIIth International Symposium on
Conference_Location :
Eindhoven
Print_ISBN :
0-7803-3953-3
DOI :
10.1109/DEIV.1998.738625
