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Proceedings Paper

Use Of An Axisymmetric Microscope With Electronic Readout For Collecting Soft X-Ray Images
Author(s): C. Cavailler; Ph. Henry; J. Launspach; J. De Mascureau; M. Millerioux; M. Rostaing; R. Sauneuf
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Paper Abstract

The axisymmetric microscope, first discussed by Wolter1-2, provides high resolution and sensitivity for investigating the soft X-ray emission of laser-driven plasmas3-4. Such a device having a 10 X magnification has been constructed. Its resolution has been evaluated empirically using several grids backlighted by either an X-ray or a visible light source. Due to surface roughness and departure from theoretical contours, the X-ray resolution was found to be near 25 µm whereas the visible light image of the 12 tim grids was still good. We present a comparison between the images of laser-driven plasmas given by this microscope and by a 10 X pinhole camera. Until now these images were recorded on X-ray film. We have shown5 that film could be replaced by C.C.D. in a pinhole camera when the photon energy lies within the 1-10 keV range. Below 1 keV the quantum yield is too low so we have used an image converter tube made by RTC. It is a diode-inverter tube with a soft X-ray photocathode and a P20 phosphor deposited on an optic fiber plate. The electronic image appearing on the screen is read by a C.C.D. working in the visible spectral fields. An electronic image readout chain, which is identical to those associated with streak cameras6, then processes automatically and immediately the images given by the microscope.

Paper Details

Date Published: 1 February 1985
PDF: 8 pages
Proc. SPIE 0491, 16th Intl Congress on High Speed Photography and Photonics, (1 February 1985); doi: 10.1117/12.967910
Show Author Affiliations
C. Cavailler, Centre d'Etudes de Limeil-Valenton (France)
Ph. Henry, Centre d'Etudes de Limeil-Valenton (France)
J. Launspach, Centre d'Etudes de Limeil-Valenton (France)
J. De Mascureau, Centre d'Etudes de Limeil-Valenton (France)
M. Millerioux, Centre d'Etudes de Limeil-Valenton (France)
M. Rostaing, Centre d'Etudes de Limeil-Valenton (France)
R. Sauneuf, Centre d'Etudes de Limeil-Valenton (France)

Published in SPIE Proceedings Vol. 0491:
16th Intl Congress on High Speed Photography and Photonics
Michel L. Andre; Manfred Hugenschmidt, Editor(s)

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