کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1831074 | 1027490 | 2008 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Layout and performance of the polarizing guide system for the J-NSE spectrometer at the FRM II
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
ابزار دقیق
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The neutron spin-echo instrument, J-NSE, that has been moved from the ELLA guide hall at the FRJ-2 in Jülich to the guide hall of the new FRM II reactor, needs an intense beam of polarized neutrons. Polarization of the short wavelengths is achieved in a bent section of about 8 m and radius 160 m, with a m=3FeSi multilayer coating. Due to the total reflection of FeSi, longer wavelengths (λâ10-20Ã
) pass unpolarized and need an additional short polarizer at the entrance of the instrument. After the bent section within a 10Â m straight guide section a turn of vertical polarization to longitudinal guide field is performed and a selector is inserted. Then about 10Â m of tapered 58Ni covered guide follows, which end with a cross-section of 60Ã60mm2. We present the design criteria and first measurements on the performance of this guide concept.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 586, Issue 1, 11 February 2008, Pages 90-94
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 586, Issue 1, 11 February 2008, Pages 90-94
نویسندگان
O. Holderer, M. Monkenbusch, G. Borchert, C. Breunig, K. Zeitelhack,