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Long-path second-harmonic interferometer with nanosecond time resolution: reliable diagnostic tool for electron density measurement in pulsed plasma devices

T. Del Rosso, F. Giammanco, M. G. Anderson, F. Conti, A. Balvis, I. Isakov, V. Matvienko, G. Strashnoy, W. Waggoner, L. Bonelli, E. Paganini, and M. W. Binderbauer

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Abstract

We describe the performance of a second-harmonic interferometer (SHI) to measure, on an optical path exceeding 12 m, the electron plasma density of two plasmoids formed in separate theta-pinch chambers and then merged in a central compression chamber after undergoing acceleration and compression. The excellent mechanical stability and a time resolution better than 50 ns suggest the application of SHI, especially in pulsed plasma devices with limited optical accesses.

© 2012 Optical Society of America

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