GINA - A polarized neutron reflectometer at the Budapest Neutron Centre

L. Bottyán, D. G. Merkel, B. Nagy, J. Füzi, Sz Sajti, L. Deák, G. Endrczi, A. V. Petrenko, J. Major

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

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 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.

Original languageEnglish
Article number015112
JournalReview of Scientific Instruments
Volume84
Issue number1
DOIs
Publication statusPublished - Jan 2013

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reflectometers
Reflectometers
Neutrons
Magnetic films
neutrons
magnetic films
reflectance
Spin polarization
Monochromators
pyrolytic graphite
monochromators
grazing incidence
Isotopes
Heterojunctions
radio frequencies
Graphite
isotopes
wafers
Scattering
membranes

ASJC Scopus subject areas

  • Instrumentation

Cite this

GINA - A polarized neutron reflectometer at the Budapest Neutron Centre. / Bottyán, L.; Merkel, D. G.; Nagy, B.; Füzi, J.; Sajti, Sz; Deák, L.; Endrczi, G.; Petrenko, A. V.; Major, J.

In: Review of Scientific Instruments, Vol. 84, No. 1, 015112, 01.2013.

Research output: Contribution to journalArticle

Bottyán, L, Merkel, DG, Nagy, B, Füzi, J, Sajti, S, Deák, L, Endrczi, G, Petrenko, AV & Major, J 2013, 'GINA - A polarized neutron reflectometer at the Budapest Neutron Centre', Review of Scientific Instruments, vol. 84, no. 1, 015112. https://doi.org/10.1063/1.4770129
Bottyán L, Merkel DG, Nagy B, Füzi J, Sajti S, Deák L et al. GINA - A polarized neutron reflectometer at the Budapest Neutron Centre. Review of Scientific Instruments. 2013 Jan;84(1). 015112. https://doi.org/10.1063/1.4770129
Bottyán, L. ; Merkel, D. G. ; Nagy, B. ; Füzi, J. ; Sajti, Sz ; Deák, L. ; Endrczi, G. ; Petrenko, A. V. ; Major, J. / GINA - A polarized neutron reflectometer at the Budapest Neutron Centre. In: Review of Scientific Instruments. 2013 ; Vol. 84, No. 1.
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