کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1668101 1008863 2011 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Investigation of aperiodic W/C multi-layer mirror for X-ray optics
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Investigation of aperiodic W/C multi-layer mirror for X-ray optics
چکیده انگلیسی

Design, fabrication and characterization of aperiodic tungsten/carbon (W/C) multi-layer mirror were studied. W/C multi-layer was designed as a broad-angle reflective supermirror for Cu–Kα line (λ = 0.154 nm) in the grazing incident angular range (0.9–1.1°) using simulated annealing algorithm. To deposit the W/C depth-graded multi-layer mirror accurately, we introduce an effective layer growth rate as a function of layer thickness. This method greatly improves the reflectivity curve compared to the conventional multi-layer mirror prepared with constant growth rate. The deposited multi-layer mirror exhibits an average reflectivity of 19% over the grazing incident angle range of 0.88–1.08° which mainly coincides with the designed value. Furthermore, the physical mechanisms were discussed and the re-sputtering process of light-atom layers is accounted for the modification of layer thicknesses which leads to the effective growth rates. Using this calibration method, the aperiodic multi-layer mirrors can be better fabricated for X-ray optics.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thin Solid Films - Volume 519, Issue 20, 1 August 2011, Pages 6712–6715
نویسندگان
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