کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1826260 1027377 2011 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Optimization of a simple X-ray diffraction instrument for portable and planetary applications
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم ابزار دقیق
پیش نمایش صفحه اول مقاله
Optimization of a simple X-ray diffraction instrument for portable and planetary applications
چکیده انگلیسی

The constraints placed on the design of portable and planetary X-ray diffraction (XRD) instruments by the limited mass, power and volume budgets are very different, in general, to the constraints applicable to laboratory equipment. A relatively simple angle-dispersive, reflection-mode instrument design with no moving parts is used to illustrate some optimization methods using Monte Carlo ray-trace modeling and theoretical calculations. Utilization of parafocusing is an important aspect of the optimization. An 55Fe radioisotope X-ray source is assumed, and it is shown that commercial, off-the-shelf sources are not optimal in their design for XRD applications. The geometrical parameters relating to the source and to a simple collimating aperture are subjected to an optimization process, which keeps both the flux incident on the sample and the size of the parafocusing circle constant.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 632, Issue 1, 11 March 2011, Pages 81–88
نویسندگان
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