Light collection and wavelength calibration for an extreme ultraviolet diode array spectrograph
Date
1989
Authors
Marconi, Mario Carlos, author
Schmerge, J. F., author
Rocca, Jorge J., author
American Institute of Physics, publisher
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Abstract
We describe the use of a simple spherical aluminum-coated mirror to image the radiation of a distant XUV-emitting plasma in the slit of a vacuum spectrograph. Calculations to determine the optimum position and curvature radius of the mirror as a function of the divergence of the emitted plasma radiation are described, Efficient light collection by the grazing incidence mirror allows calibration of an intensified diode array used as a detector with a low-pressure (10-4 Torr) dc capillary discharge that does not require a complex differential pumping system.
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Subject
mirrors
plasma diagnostics
extreme ultraviolet spectra
ultraviolet spectrometers
coatings
efficiency
focusing
photodetectors