Published April 21, 2003 | Version v1
Journal article Metadata-only

Mechanism for negative corona current pulse in CO2-SF6 mixtures

Creators

  • 1. Faculty of Mathematics, Physics, and Informatics, Institute of Physics, Comenius University, Mlynska dolina F2, 842 48 Bratislava (Slovakia)
  • 2. Faculty of Natural Sciences, University of Zilina, Hurbanova 15, Zilina (Slovakia)

Description

Current waveforms of first negative corona pulses have been measured in CO2-SF6 mixtures over a pressure range extending from 6.65 to 50 kPa and various overvoltages. Effects of changing cathode secondary electron emission were studied using a copper cathode coated by CuI and graphite. For a given set of experimental conditions it is concluded that in the mixtures containing up to 30% of SF6 the negative corona pulse is associated with the formation of a cathode-directed streamer-like ionizing wave in the immediate vicinity of the cathode. This is in contrast to the discharge behaviour in air-SF6 and N2-SF6 mixtures, where in similar conditions the discharge develops according to a multi-avalanche Townsend mechanism. (rapid communication)

Availability note (English)

Available online at http://stacks.iop.org/0022-3727/36/L39/d308l1.pdf or at the Web site for the Journal of Physics. D, Applied Physics (ISSN 1361-6463) http://www.iop.org/

Additional details

Identifiers

URL
http://stacks.iop.org/0022-3727/36/L39/d308l1.pdf; http://www.iop.org/;
PII
S0022-3727(03)59564-X;

Publishing Information

Journal Title
Journal of Physics. D, Applied Physics
Journal Volume
36
Journal Issue
8
Journal Page Range
p. L39-L41
ISSN
0022-3727
CODEN
JPAPBE

INIS

Country of Publication
United Kingdom
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
34052452
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Descriptors DEI
CARBON DIOXIDE; CATHODES; COPPER IODIDES; CORONA DISCHARGES; CURRENTS; ELECTRON EMISSION; GRAPHITE; MIXTURES; PHONONS; PULSES; SECONDARY EMISSION; STRUCTURAL CHEMICAL ANALYSIS; SULFUR FLUORIDES; SYNCHROTRON RADIATION; TOWNSEND DISCHARGE; WAVE FORMS; X-RAY DIFFRACTION
Descriptors DEC
BREMSSTRAHLUNG; CARBON; CARBON COMPOUNDS; CARBON OXIDES; CHALCOGENIDES; COHERENT SCATTERING; COPPER COMPOUNDS; COPPER HALIDES; DIFFRACTION; DISPERSIONS; ELECTRIC DISCHARGES; ELECTRODES; ELECTROMAGNETIC RADIATION; ELEMENTS; EMISSION; FLUORIDES; FLUORINE COMPOUNDS; HALIDES; HALOGEN COMPOUNDS; IODIDES; IODINE COMPOUNDS; MINERALS; NONMETALS; OXIDES; OXYGEN COMPOUNDS; QUASI PARTICLES; RADIATIONS; SCATTERING; SULFUR COMPOUNDS; TRANSITION ELEMENT COMPOUNDS