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Title: Laser-triggering of spark gap switches
Authors: Larsson, A. 
Yap, D.
Au, J.
Carlsson, T.E.
Issue Date: 2013
Citation: Larsson, A.,Yap, D.,Au, J.,Carlsson, T.E. (2013). Laser-triggering of spark gap switches. Digest of Technical Papers-IEEE International Pulsed Power Conference : -. ScholarBank@NUS Repository.
Abstract: Switching time jitter is one of the important properties to consider when selecting a closing switch for a pulsedpower system, and the most time-precise triggering can be achieved by the use of lasers. For a mid-gap laser-triggered spark gap, three different physical mechanisms can be used: nonresonant multiphoton ionization, resonant-enhanced multiphoton ionization and electron tunneling. The first one is tradition all y used, wher eas the latter two are more exploratory. In this work, the traditional method is employed to study the delay time and time jitter of a laser-triggered spark gap using a Nd:YAG laser at 1064 nm and 532 nm, where the laser pulse is guided via an optical fibre to the spark gap; the laser pulse energy and the applied voltage have been varied for different working gases. One draw-back of the current laser triggering technology compared to other triggering techniques is that laser systems are more complex and prone to electromagnetic interference. Another downside is that the pulse-repetition rate is poor. A discussion about the development of lasers to overcome these issues is included, together with a deliberation about the pros and cons of the two exploratory methods of laser triggering. © 2013 IEEE.
Source Title: Digest of Technical Papers-IEEE International Pulsed Power Conference
ISBN: 9781467351676
DOI: 10.1109/PPC.2013.6627479
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