کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1688002 | 1010705 | 2006 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Measured operational neutron energies of compound refractive lenses
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سطوح، پوششها و فیلمها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The characteristics of two compound refractive lenses (CRLs) have been measured using a broadband spallation neutron source. One CRL consists of a stack of 98 biconcave, spherical lenses made of MgF2, and another consists of 198 biconcave, spherical lenses made of Al. The bandwidth of the spallation source included wavelengths from 1.5Â Ã
to 15.7Â Ã
that we could use to test the CRLs. The MgF2 CRL was found to be useful from 9 to 15Â Ã
with the maximum transmission around 13Â Ã
, whereas the Al CRL was found to give good transmission around 5-15Â Ã
, with the maximum transmission around 8Â Ã
. Spectra with Al lens and MgF2 CRLs show multiple transmission dips due to Bragg diffraction of the microcrystal structure of the lens materials (Al or MgF2). These measurements helped characterize the CRLs for possible applications at shorter wavelengths than previously used.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 251, Issue 2, October 2006, Pages 507-511
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 251, Issue 2, October 2006, Pages 507-511
نویسندگان
H. Park, J.T. Cremer, M.A. Piestrup, C.K. Gary, Rex P. Hjelm, W.C.L.J. Sellyey, R.H. Pantell,