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Spatially resolved X-ray spectroscopy using a flat HOPG crystal

Yuan, X. H. and Carroll, D. C. and Coury, M. and Gray, R. J. and Brenner, C. M. and Lin, X. X. and Li, Y. T. and Quinn, M. N. and Tresca, O. and Zielbauer, B. and Neely, D. and McKenna, P. (2011) Spatially resolved X-ray spectroscopy using a flat HOPG crystal. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 653 (1). pp. 145-149. ISSN 0168-9002

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Abstract

A novel design of a 1-D imaging X-ray spectrometer is implemented, using a high efficiency HOPG (highly oriented pyrolitic graphite) Bragg crystal and a double-entrance-slit. The double slit provides self-calibration of the imaging magnification. The spatial and spectral resolutions and dispersion are characterised both analytically and by ray tracing simulations. A key feature of this approach is that it enables the X-ray spectrum to be measured over different regions of the plasma source. The application of this instrument is demonstrated in high intensity laser-foil interaction experiments.