Journal ArticleDOI
Laser Triggered Switching of a Pulsed Charged Oil Filled Spark Gap
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TLDR
In this article, a focused, Q-spoiled laser, aligned along the interelectrode axis of a pulse charged switch assembly, was used to initiate the conduction of an overvolted transformer oil filled gap.Abstract:
A focused, Q‐spoiled laser, aligned along the interelectrode axis of a pulse charged switch assembly, was used to initiate the conduction of an overvolted transformer oil filled gap. Laser power varied between 5 and 200 MW and the voltage pulse exhibited a risetime of 500 nsec to a voltage of 700 kV. A parametric study of the factors affecting the delay between the laser pulse arrival at the gap and conduction of the gap was accomplished, in which the effects of the focal point location, laser power, switch polarity, and voltage on the gap at laser arrival were determined. Delay times as short as 12 nsec were recorded with jitter, a measure of reproducibility, in the low nanosecond region.read more
Citations
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Journal ArticleDOI
The laser triggering of high-voltage switches
A H Guenther,J R Bettis +1 more
TL;DR: The laser-triggered switching (LTS) of highvoltage spark gaps is considered in this paper, which predicts dependencies of the delay to breakdown and switching jitter on such variables as fill gas mixture and pressure, gap spacing, polarity, and geometry.
High Voltage Water Breakdown Studies
TL;DR: In this article, the breakdown voltage and time to breakdown for electrodes in water has been measured, and several electrode treatments and water treatments were tried in an effort to uncover the secret.
Journal ArticleDOI
Laser triggering of electric breakdown in liquids
TL;DR: In this article, the authors used a laser-produced plasma to initiate the breakdown of n-hexane and transformer oil in semihomogeneous geometries using a laser triggering method for fields far below the spontaneous breakdown field.
Journal ArticleDOI
170-kV laser-triggered water switch experiments
TL;DR: In this paper, the authors used a small Q-switched Nd:YAG laser at 532 and 1064 nm to trigger a 170-kV pulse-charged water switch.
Journal ArticleDOI
On the use of perfluoropolyether fluids in HV spark-gaps
A Luches,L Provenzano +1 more
TL;DR: In this article, the dielectric properties of perfluoropolyether fluids (Fomblin Y) and their transparence to ultraviolet radiation were evaluated in high-power spark gap triggered by pulsed N2 lasers.
References
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Journal ArticleDOI
Investigation of a Laser Triggered Spark Gap
TL;DR: In this paper, the delay time between arrival of the laser pulse and current flow across the gap was studied as a function of total laser beam power (0 −80 MW), dielectric gas (SF6, N2, air), gas pressure (100 −1400 Torr), electrode spacing (0.4 −1.5 cm), gap electric field (10 −100 kV/cm), and focus point location between two 5 cm diam stainless steel spheres.
Journal ArticleDOI
12.2 - Laser-triggered megavolt switching
A. Guenther,J. Bettis +1 more
TL;DR: In this article, the effect of polarity on switch performance was investigated and it was concluded that irradiation of the charged electrode was preferred and irradiated positive-rather than negative-charged electrodes gave best performance.
Journal ArticleDOI
Low-jitter multigap laser-triggered switching at 50 pps
TL;DR: In this paper, a Q-spoiled YAG laser irradiated each of four 50-kV spark gaps with 10-20 mJ energy in a 7ns pulse full-wave at half maximum (FWHM) by use of simple beam-splitting techniques.
Journal ArticleDOI
Laser-triggered switching in a liquid dielectric
TL;DR: In this article, a parametric study has been performed relating the delay and jitter characteristics of the switch to the laser parameters, and the delay times of less than 30 ns were observed with apparent sub-nanosecend jitter times.