First Measurements at Neutron Reflectometers TNR and NERO-2

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Abstract

Paper briefly describes the main units of TNR and NERO-2 neutron reflectometers installed in the hall of horizontal experimental channels of the new high flux PIK-reactor (NRC “Kurchatov Institute”– PNPI) as part of the program for commissioning the first five stations of the instrument base of this reactor. TNR and NERO-2 neutron reflectometers are designed for conducting studies of the magnetic and non-magnetic multilayer nanostructures, including certification of neutron-optical elements for the neutron stations. The TNR has the ability to work in measurement modes with “white” unpolarized/polarized beams and with monochromatic unpolarized/polarized neutron beams (wavelengths from 0.09 to 0.5 nm). NERO-2 is a high-resolution reflectometer with a fixed wavelength and the ability to work with both non-polarized and polarized monochromatic beams. The paper discusses the results of the first measurements of neutron-optical samples on a glass substrates carried out on TNR and NERO-2 reflectometers at the start of the PIK reactor at a power of 7 MW. Measurements were carried out on TNR with a supermirror, which is an aperiodic multilayer nanosystem of 171 pairs of alternating Ni and Ti layers (m = 2.5). On NERO-2, measurements were carried out with a mirror monochromator, which is a periodic multilayer nanosystem of 60 pairs of alternating NiMo and Ti layers with a thickness of 60 Å each.

About the authors

M. V. Dyachkov

National Research Centre “Kurchatov Institute” — Petersburg Institute of Nuclear Research

Author for correspondence.
Email: dyachkov_mv@pnpi.nrcki.ru
Russian Federation, Gatchina, 188300

V. A. Matveev

National Research Centre “Kurchatov Institute” — Petersburg Institute of Nuclear Research

Email: matveev_va@pnpi.nrcki.ru
Russian Federation, Gatchina, 188300

V. G. Syromyatnikov

National Research Centre “Kurchatov Institute” — Petersburg Institute of Nuclear Research; Saint Petersburg University

Email: syromyatnikov_vg@pnpi.nrcki.ru

Faculty of Physics

Russian Federation, Gatchina, 188300; Peterhof, Saint Petersburg, 198504

V. V. Tarnavich

National Research Centre “Kurchatov Institute” — Petersburg Institute of Nuclear Research

Email: dyachkov_mv@pnpi.nrcki.ru
Russian Federation, Gatchina, 188300

V. A. Ulyanov

National Research Centre “Kurchatov Institute” — Petersburg Institute of Nuclear Research

Email: dyachkov_mv@pnpi.nrcki.ru
Russian Federation, Gatchina, 188300

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