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Transmission line transformer for reliable and low-jitter triggering of a railgap switch.
- Source :
- Review of Scientific Instruments; 2014, Vol. 85 Issue 9, p1-6, 6p
- Publication Year :
- 2014
-
Abstract
- The performance of railgap switch critically relies upon multichannel breakdown between the extended electrodes (rails) in order to ensure distributed current transfer along electrode length and to minimize the switch inductance. The initiation of several simultaneous arc channels along the switch length depends on the gap triggering technique and on the rate at which the electric field changes within the gap. This paper presents design, construction, and output characteristics of a coaxial cable based three-stage transmission line transformer (TLT) that is capable of initiating multichannel breakdown in a high voltage, low inductance railgap switch. In each stage three identical lengths of URM67 coaxial cables have been used in parallel and they have been wounded in separate cassettes to enhance the isolation of the output of transformer from the input. The cascaded output impedance of TLT is ~50 Ω. Along with multi-channel formation over the complete length of electrode rails, significant reduction in jitter (≤2 ns) and conduction delay (≤60 ns) has been observed by the realization of large amplitude (~80 kV), high dV/dt (~6 kV/ns) pulse produced by the indigenously developed TLT based trigger generator. The superior performance of TLT over conventional pulse transformer for railgap triggering application has been compared and demonstrated experimentally. [ABSTRACT FROM AUTHOR]
- Subjects :
- ELECTRIC lines
ELECTRODES
ELECTRIC inductance
ELECTRIC transformers
HIGH voltages
Subjects
Details
- Language :
- English
- ISSN :
- 00346748
- Volume :
- 85
- Issue :
- 9
- Database :
- Complementary Index
- Journal :
- Review of Scientific Instruments
- Publication Type :
- Academic Journal
- Accession number :
- 98652585
- Full Text :
- https://doi.org/10.1063/1.4896117