Instrumental design and performance of a new pulsed-neutron reflectometer (ARISA) at KENS for studying free surfaces

N. Torikai, M. Furusaka, H. Matsuoka, Y. Matsushita, M. Shibayama, A. Takahara, M. Takeda, S. Tasaki, H. Yamaoka

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Abstract

A new neutron reflectometer (ARISA) for studying free surfaces was installed at one of the thermal neutron ports viewing an ambient-temperature water moderator at the KENS pulsed spallation neutron source. ARISA is quite a unique reflectometer; it uses thermal neutrons at the pulsed neutron source, and it is the first one in Japan with a vertical scattering-plane geometry. The neutron beam is guided downward onto the sample surface at angles of 0-0.47° and 1.4° to the horizontal. Through several test measurements using different types of samples, it was clarified that specular reflection can be currently measured down to 10-6 in reflectivity and up to 3 nm-1 in neutron momentum transfer along the vertical direction using white neutrons with a wavelength of 0.1-0.4 (0.6) nm. This performance could be further improved by future reinforcement of the shield for background reduction.

Original languageEnglish
Pages (from-to)S264-S266
JournalApplied Physics A: Materials Science and Processing
Volume74
Issue numberSUPPL.I
DOIs
Publication statusPublished - Dec 1 2002

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)

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    Torikai, N., Furusaka, M., Matsuoka, H., Matsushita, Y., Shibayama, M., Takahara, A., Takeda, M., Tasaki, S., & Yamaoka, H. (2002). Instrumental design and performance of a new pulsed-neutron reflectometer (ARISA) at KENS for studying free surfaces. Applied Physics A: Materials Science and Processing, 74(SUPPL.I), S264-S266. https://doi.org/10.1007/s003390101095