Measuring Picosecond Flashover in Closing Coaxial Spark Gap Switch

• Authors: J. Klüss , J. Hällström
• Languages of publication: EN

Abstracts

EN

Flashover voltage and picosecond risetime of breakdown in pressurized SF_{6} gas is studied on a coaxial line. Gas pressure is varied from 1 to 19 bar. The homogeneous field gap has an opening from ca. 0.2 to 0.9 mm, and flashover voltages reach 120 kV. Measurements are performed using a D-dot probe with 16 to 20 GHz real-time oscilloscopes and a 50 GHz sampling oscilloscope. Measured risetimes are down to ca. 50 ps, and the dependence of voltage collapse on gas density and electric field between the electrodes is reported. Integrity of data is analyzed and experimental results are compared with present theory found in literature and previous results measured with alternative real-time systems.

Keywords

EN

51.50.+v; 52.70.Gw; 52.80.-s

Discipline

• 51.50.+v: Electrical properties (ionization, breakdown, electron and ion mobility, etc.)(see also 52.80.-s Electric discharges in physics of plasmas)
• 52.80.-s: Electric discharges(see also 51.50.+v Electrical properties of gases; for plasma reactions including flowing afterglow and electric discharges, see 82.33.Xj in physical chemistry and chemical physics)
• 52.70.Gw: Radio-frequency and microwave measurements

• Journal: Acta Physica Polonica A
• Year: 2009
• Volume: 115
• Issue: 6
• Pages: 1004-1006

Dates

published

2009-06

Contributors

author

J. Klüss

• Department of Electrical and Communications Engineering, Helsinki University of Technology, P.O. Box 3000, FI-02015 TKK, Finland

author

J. Hällström

• Department of Electrical and Communications Engineering, Helsinki University of Technology, P.O. Box 3000, FI-02015 TKK, Finland

References

• 1. J. Klüss, M. Sc. Thesis, Helsinki University of Technology, 2007
• 2. CIGRE, Breakdown of Gases in Uniform Fields, Working Group 15.03 (1977)
• 3. N.H. Malik, A.H. Qureshi, IEEE Trans. Electr. Insul. 13, 135 (1978)
• 4. S. Burkhart, IEEE Trans. Microwave Theory Techniques 33, 262 (1985)

Identifiers

DOI

10.12693/APhysPolA.115.1004