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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Krompholz, H. Hatfield, L. Neuber, A. Chaparro, J. Ryu, H.-Y. Justis, W. |
| Copyright Year | 2006 |
| Description | Author affiliation: Dept. of Electr. & Comput. Eng., Texas Tech. Univ., Lubbock, TX (Krompholz, H.; Hatfield, L.; Neuber, A.; Chaparro, J.; Ryu, H.-Y.; Justis, W.) |
| Abstract | Gas breakdown in quasi homogeneous electric fields with amplitudes of up to 3 MV/cm is investigated. The setup consists of a RADAN 303 A pulser and pulse sheer SN 4, an impedance-matched oil-filled coaxial line with a lens-transition to a biconical line in vacuum or gas, and an axial or radial gap with a width on the order of mm, with a symmetrical arrangement on the other side of the gap. Capacitive voltage dividers allow to determine voltage across as well as conduction current through the gap, with a temporal resolution determined by the oscilloscope sampling rate of 20 GS/s and an analog bandwidth of 6 GHz. The gap capacitance charging time and voltage risetime across the gap is less than 250 ps. Previous experiments at TTU with a slightly larger risetime have shown that breakdown is governed by runaway electrons, with multi-channel formation and high ionization and light emission in a thin cathode layer only. In argon and air, time constants for the discharge development have been observed to have a minimum of around 100 ps at several 10 torr. A qualitative understanding of the observed phenomena and their dependence on gas pressure is based on explosive field emission and gaseous ionization for electron runaway conditions. |
| Starting Page | 569 |
| Ending Page | 572 |
| File Size | 552617 |
| Page Count | 4 |
| File Format | |
| ISBN | 1424405467 |
| DOI | 10.1109/CEIDP.2006.311996 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2006-10-15 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Electric breakdown Atmosphere Voltage Space vector pulse width modulation Electron emission Ionization Tin Impedance Coaxial components Oscilloscopes |
| Content Type | Text |
| Resource Type | Article |
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