کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8165864 | 1526220 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Computer-aided assembly of X-ray parabolic cylinder laterally graded multilayer reflector to collimate divergent beam in XRD
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
ابزار دقیق
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In X-ray diffraction, it is essential to irradiate the sample with a parallel beam to avoid severe diffraction pattern aberration. A parabolic cylinder laterally graded multilayer reflector is a good choice for this purpose. However, its assembly is critical. Usually, reflector performance is simulated during design, and the effects of assembly errors are qualitatively computed before assembly. However, for micro-scale assembly processes, the qualitative error results in a time-assuming procedure and an unsatisfactory data. A Computer-aided assembly process, details of a quantitative guide of adjustment, is hereby presented for a precision adjustment. Firstly, a high-efficiency setup to collimate the divergent beam and evaluate the collimation beam is proposed. Secondly, the performance of the reflector used in the experiment is simulated according to the parameters of each unit in the setup. Thirdly, during the adjustment process, each essential adjustment step is analyzed, and the resetting value of each error is quantitatively computed and used to guide the adjustment. Lastly, the assembled reflector is highly effective with a divergent angle of less than 0.004 deg.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 906, 21 October 2018, Pages 22-29
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 906, 21 October 2018, Pages 22-29
نویسندگان
Yiyun Yao, Zhong Zhang, Shengzhen Yi, Zhe Zhang, Chun Xie,