Large-field high-resolution x-ray microscope for studying laser plasmas

Journal Article · Mon Sep 01 00:00:00 EDT 1997 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.1148302· OSTI ID:542356

Sauneuf, R; Dalmasso, J; Jalinaud, T; Le Breton, J ^[1]; Schirmann, D ^[2]; Marioge, J; Bridou, F; Tissot, G; Clotaire, J ^[3]

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1. Commissariat a l`Energie Atomique (CEA)/Limeil-Valenton, 94195 Villeneuve St-Georges Cedex (France)
2. Commissariat a l`Energie Atomique (CEA)/Bruyeres-le-Chatel, BP 12, 91680 Bruyeres-le-Chatel (France)
3. Institut d`Optique Theorique et Appliquee (IOTA), Batiment 503, Centre scientifique d`Orsay, BP 147, 91403 Orsay Cedex (France)

In 1948, P. Kirkpatrick and A. V. Baez developed an x-ray microscope (energy range about 100 eV{endash}10 keV) composed of two concave spherical mirrors working at grazing incidence. That device, named KB microscope, presents a 3{endash}5 {mu}m resolution within a field having a radius about 100 {mu}m; outside that field, its resolution lowers rapidly when the object point recedes from the center. The adjunction of two similar mirrors can notably increase the useful field (typically, the resolution can be better than 10 {mu}m within a 2-mm-diam field of view), which is necessary for studying laser plasmas. Its main advantage with respect to more simple optics, as the pinhole, is that it can be located far enough from the plasma to avoid any destruction during the shot. We describe such a microscope that we call KBA microscope and present some images of fine metallic grids. Those grids were backlighted by x-ray sources, either a cw one or a series of laser plasmas from the Octal{endash}H{acute e}liotrope facility. Examining the films in detail shows that the experimental results are very close to the theoretical characteristics; hence the interest of this device for the x-ray diagnostics on the future powerful laser facilities. {copyright} {ital 1997 American Institute of Physics.}

• OSTI ID: 542356
• Journal Information: Review of Scientific Instruments, Vol. 68, Issue 9; Other Information: PBD: Sep 1997
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION
PLASMA DIAGNOSTICS
X-RAY EQUIPMENT
LASER-PRODUCED PLASMA
DESIGN
FABRICATION
MICROSCOPY