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GINA—A polarized ne...
GINA—A polarized neutron reflectometer at the Budapest Neutron Centre
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- Bottyán, L. (författare)
- Wigner RCP, RMKI, Budapest, Hungary
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- Merkel, D. G. (författare)
- Wigner RCP, RMKI, Budapest, Hungary
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- Nagy, Bela (författare)
- Wigner RCP, RMKI, Budapest, Hungary
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- Füzi, J. (författare)
- Wigner RCP, SZFKI, Budapest, Hungary; Pollack Mihaly Faculty of Engineering and Information Technology, University of Pécs, Pécs, Hungary
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- Sajti, Sz. (författare)
- Wigner RCP, RMKI, Budapest, Hungary
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- Deák, L. (författare)
- Wigner RCP, RMKI, Budapest, Hungary
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- Endrőczi, G. (författare)
- Wigner RCP, RMKI, Budapest, Hungary
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- Petrenko, A. V. (författare)
- Frank Laboratory of Neutron Physics, JINR, Dubna, Russia
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- Major, J. (författare)
- Wigner RCP, RMKI, Budapest, Hungary; Max-Planck-Institut für Intelligente Systeme (formerly Max-Planck-Institut für Metallforschung), Stuttgart, Germany
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(creator_code:org_t)
- American Institute of Physics, 2013
- 2013
- Engelska.
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Ingår i: Review of Scientific Instruments. - : American Institute of Physics. - 0034-6748 .- 1089-7623. ; 84:1
- Relaterad länk:
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https://doi.org/10.1...
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http://arxiv.org/pdf...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The setup, capabilities, and operation parameters of the neutron reflectometer GINA, the recently installed “Grazing Incidence Neutron Apparatus” at the Budapest Neutron Centre, are introduced. GINA, a dance-floor-type, constant-energy, angle-dispersive reflectometer is equipped with a 2D position-sensitive detector to study specular and off-specular scattering. Wavelength options between 3.2 and 5.7 Å are available for unpolarized and polarized neutrons. Spin polarization and analysis are achieved by magnetized transmission supermirrors and radio-frequency adiabatic spin flippers. As a result of vertical focusing by a five-element pyrolytic graphite monochromator, the reflected intensity from a 20 × 20 mm2 sample has been doubled. GINA is dedicated to studies of magnetic films and heterostructures, but unpolarized options for non-magnetic films, membranes, and other surfaces are also provided. Shortly after its startup, reflectivity values as low as 3 × 10−5 have been measured by the instrument. The instrument capabilities are demonstrated by a non-polarized and a polarized reflectivity experiment on a Si wafer and on a magnetic film of [62Ni/natNi]5 isotope-periodic layer composition. The facility is now open for the international user community. Its further development is underway establishing new sample environment options and spin analysis of off-specularly scattered radiation as well as further decreasing the background.
Ämnesord
- NATURVETENSKAP -- Fysik -- Acceleratorfysik och instrumentering (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Accelerator Physics and Instrumentation (hsv//eng)
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