A method for polarization control and analysis on Bonse–Hart double-crystal USANS instruments

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• 作者：Littrell ; Kenneth C. ; Lee ; Wai Tung
• 关键词：61.12.Ex ; USANS ; Polarization ; Magnetism ; Prism ; Neutron Scattering ; Instrumentation
• 刊名：Physica B
• 出版年：2004
• 出版时间：March 1, 2004
• 年：2004
• 卷：345
• 期：1-4
• 页码：246-249
• 全文大小：206 K

文摘

The use of polarized beams and polarization analysis is an area of increasing interest to the small-angle neutron scattering (SANS) community. Since the angular acceptance of a DCD USANS instrument is very narrow, magnetic prisms can be exploited to select polarization. We compare two schemes by which this can be accomplished and describe how this method can be adapted for use on time-of-flight DCD USANS instruments. The wavelength dispersion of the prism can be used on steady-state instruments to select or suppress higher harmonics of the characteristic incident wavelength.