X-ray line measurements with high efficiency Bragg crystals

Conference item

We have studied the focusing properties of two highly oriented pyrolitic graphite (HOPG) spectrometers, which differ in the degree of the mosaic spread: ZYA with a low mosaic spread (gamma=0.4degrees) and ZYH with a large mosaic spread (gamma=3.5degrees). In order to asses the crystal performance for a variety of different experiments, various Kalpha and Kbeta x-ray lines have been produced using a high-intensity (greater than or similar to10(17) W/cm(2)) short-pulse (similar to100 fs) laser beam focused onto Ti, V, Zn, and Cu foils. The measured spectral resolution of the HOPG crystals in both first and second order diffraction has been compared with theoretical predictions. Using known values for the peak reflectivity of HOPG crystals, we have also computed Kalpha x-ray conversion efficiencies of Ti, V, Zn, and Cu. These results are important to estimate the optimal conditions under which different types of HOPG monochromators can be used for the detection of weak x-ray signals as the one encountered in x-ray Thomson/Compton scattering experiments. (C) 2004 American Institute of Physics.

Authors: Pak, A; Gregori, G; Knight, J; Campbell, K; Price, D

• Publication status: Published
• Journal: REVIEW OF SCIENTIFIC INSTRUMENTS
• Volume: 75
• Issue: 10
• Pages: 3747-3749
• Publication date: 2004-10-01
• Event title: 15th Topical Conference on High-Temperature Plasma Diagnostics
• DOI: 10.1063/1.1788870
• EISSN: 1089-7623
• ISSN: 0034-6748
• Keywords: SCATTERING