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Proceedings Paper

Mesures En Hydrodynamique Au Moyen De Sondes Optiques Et D'un Enregistrement Par Camera Electronique A Fente
Author(s): Jean-Pierre Gauthier; Michel Bouchu
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Paper Abstract

At the 12th International Congress on High Speed Photography in Toronto, L.L. Shaw, R.R. Donaldson, J.R. Murchie Ans T.S. Ramos Of The Lawrence Livermore Laboratory, showed how they change timing by electrical pins for a device composed of a small closed space on the pin tip, yielding a flash when this probe is shocked. The optical signal is transmitted through optical fiber and recorded by a streak camera. We use the same method in the base, but with an image-converter streaking camera to record the light signal and this makes the device more sensitive, really improves the performances and simplifies the setting-up. For example : - The small ionization space simply filled with air at normal pressure still gives an available signal even for a 100 kbar shock in the cap, or a copper flyer plate velocity of 1 mm/ /us. - The optical fiber transmitting the information from the working tip of the probe to the camera admits up to 20 dB transmission losses for a pressure of about 500 kbar. - It's possible to get a sweep speed of 50 mm//us for pressure greater than 500 kbar. The variation of the light source according to the time within its optical density is an extra available information.

Paper Details

Date Published: 27 July 1979
PDF: 5 pages
Proc. SPIE 0189, 13th Intl Congress on High Speed Photography and Photonics, (27 July 1979); doi: 10.1117/12.957668
Show Author Affiliations
Jean-Pierre Gauthier, Centre d'Etudes de Vaujours - Service Moyens d'Essais (France)
Michel Bouchu, Centre d'Etudes de Vaujours - Service Moyens d'Essais (France)

Published in SPIE Proceedings Vol. 0189:
13th Intl Congress on High Speed Photography and Photonics
Shin-Ichi Hyodo, Editor(s)

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