X-RAY FOCUSING CRYSTAL VON HAMOS SPECTROMETER WITH A CCD LINEAR ARRAY AS A DETECTOR

An x-ray focusing crystal von Hamos spectrometer was developed using mica and graphite cylindrical crystals (radius of curvature R=20 mm) with a CCD linear array detector. The commercial CCD (Toshiba model TCD 1304AP) used for x-ray detection has 3724 pixels (8 μm width and 200 μm height) giving a total length of ~30 mm. The CCD detector was absolutely calibrated using laser-produced plasmas. The sensitivity of the detector was two-three orders of magnitude higher than the sensitivity x-ray photographic film (Kodak RAR 2492). In combination with a focusing von Hamos spectrometer the detector was used for absolute spectral measurements and the determination of the laser-produced plasma parameters. This spectrometer is promising for absolute spectral measurements of x-ray radiation of low-intensity sources and for numerous practical applications (e.g., x-ray fluorescence analysis and EXAFS).