کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8176034 1526373 2014 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Ray-tracing simulations of spherical Johann diffraction spectrometer for in-beam X-ray experiments
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم ابزار دقیق
پیش نمایش صفحه اول مقاله
Ray-tracing simulations of spherical Johann diffraction spectrometer for in-beam X-ray experiments
چکیده انگلیسی
The results of the Monte-Carlo ray-tracing simulations for a Johann-type Bragg spectrometer with spherically curved-crystal designed to detect the X-rays from a fast-moving source are reported. These calculations were performed to optimize the X-ray spectrometer to be used at the gas-target installed at ion storage ring for high-resolution X-ray experiments. In particular, the two-dimensional distributions of detected photons were studied using the Monte-Carlo method both for the stationary and moving X-ray sources, taking into account a detailed description of X-ray source and X-ray diffraction on the crystal as well as a role of the Doppler effect for in-beam experiments. The origin of the asymmetry of observed X-ray profiles was discussed in detail and the procedure to derive a precise (sub-eV) X-ray transition energy for such asymmetric profiles was proposed. The results are important for the investigations of 1s2pP23→1s2sS13 intrashell transition in excited He-like uranium ions in in-beam X-ray experiments.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 753, 21 July 2014, Pages 121-130
نویسندگان
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