Abstract:It is often desired to locate a synchrotron x-ray beam precisely in space with minimal disturbance of its spatial profile and spectral content. This can be done by passing the beam through an ultrathin, flat, smooth metal foil having well-defined composition, preferably a single chemical element such as chromium, titanium or aluminum. Localized fluorescence of the foil at characteristic x-ray lines where the x-ray beam passes through the foil serves to locate the beam in two dimensions. Use of two such foils a… Show more
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