Application of a ferroelectric plasma cathode as a high-current switch
Physics Department, Technion-Israel Institute of Technology, 32000 Haifa, Israel
Corresponding author: a email@example.com
Published online: 15 April 2002
In this paper the parameters of two types of high-current switches based on ferroelectric BaTiO3 ignition are presented. Both types of switches showed a reliable and controllable operation with a repetition rate of several Hz. The first type is a vacuum two-electrode switch ignited by the plasma which is generated by a BaTiO3 cathode. This type of switch was tested in the voltage range of kV and switched current amplitude of kA with either negative or positive polarity of the high-voltage electrode. The second type is a BaTiO3 surface flashover strip-like switch ignited by a driving pulse which has an amplitude of several kV. It was shown that the application of the driving pulse (>10 kV) leads to the appearance of many non-complete surface discharges which transform further to a multi-channel discharge. This type of switch was tested in the voltage range of kV and current amplitude of kA. The design of the switches, their lifetime, the time jitter and the parameters of the switched current for different discharge conditions are presented.
PACS: 52.75.Kq – Plasma switches (e.g., spark gaps) / 52.50.Dg – Plasma sources / 77.80.Fm – Switching phenomena
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2002