The high-intensity reflectometer of the Jülich Centre for Neutron Science: MARIA.
JOURNAL OF APPLIED CRYSTALLOGRAPHY(2018)
摘要
MARIA (magnetism reflectometer with high incident angle) is a world class vertical sample reflectometer dedicated to the investigation of thin films in the fields of magnetism, soft matter and biology. The elliptical vertically focusing guide allows one to measure small samples with a typical size of 1 x 1 cm very efficiently. The double-bounce polarizer and the in situ pumped He-3 SEOP (spin-exchange optical pumping) neutron spin filter cell for analysing the polarization of the reflected neutron beam can be moved into the beam in seconds. The polarized flux of MARIA amounts to 5 x 10(7) n (s cm(2))(-1) at the sample position with a horizontally collimated beam of 3 mrad, a wavelength of lambda = 4.5 angstrom and a wavelength resolution of Delta lambda/lambda = 10%. In the non-polarized mode a flux of 1.2 x 10(8) n (s cm(2))(-1) is achieved in this configuration. MARIA is also capable of grazing-incidence small-angle neutron scattering measurements, using a pinhole collimation with two four-segment slits and an absorber that prevents the focusing of the elliptical guide in the vertical direction.
更多查看译文
关键词
polarized neutron reflectometry,magnetism,grazing-incidence small-angle neutron scattering,GISANS
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要