Moire deflectometry diagnostic for transient plasma using a multi-pulse N/sub 2/ laser

The authors have designed a multi-pulse laser system to measure nanosecond timescale, plasma-density gradients by moire/spl acute/ deflectometry. The complete system consists of four, transverse-excited, atmospheric pressure (TEA) N/sub 2/ laser oscillators and two low-pressure N/sub 2/ laser amplif...

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Bibliographic Details
Published inDigest of Technical Papers. Tenth IEEE International Pulsed Power Conference Vol. 2; pp. 903 - 910 vol.2
Main Authors Moosman, B., Bystritskii, V.M., Wessel, F.J.
Format Conference Proceeding
LanguageEnglish
Published IEEE 1995
Subjects
Collimators
Diffraction
Laser beams
Laser theory
Oscillators
Plasma density
Plasma diagnostics
Plasma measurements
Pulse amplifiers
Pump lasers
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Summary:The authors have designed a multi-pulse laser system to measure nanosecond timescale, plasma-density gradients by moire/spl acute/ deflectometry. The complete system consists of four, transverse-excited, atmospheric pressure (TEA) N/sub 2/ laser oscillators and two low-pressure N/sub 2/ laser amplifiers; two oscillator pulses are injected into a single amplifier. The amplified pulses are less than a nanosecond in duration, with a variable, inter-pulse time of 4-10 nanoseconds. Described here, two TEA oscillators and a single amplifier were used to image air-density gradients in an expanding air-shock wave produced by a spark discharge.
ISBN:0780327918
9780780327917
DOI:10.1109/PPC.1995.599727