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Applied Physics A

, Volume 74, Supplement 1, pp s264–s266 | Cite as

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

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.

PACS: 61.12.Ha; 68.10.-m; 68.35.-p 

Copyright information

© Springer-Verlag 2002

Authors and Affiliations

  • N. Torikai
    • 1
  • M. Furusaka
    • 1
  • H. Matsuoka
    • 2
  • Y. Matsushita
    • 3
  • M. Shibayama
    • 4
  • A. Takahara
    • 5
  • M. Takeda
    • 6
  • S. Tasaki
    • 7
  • H. Yamaoka
    • 8
  1. 1.Neutron Science Laboratory, High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba, Ibaraki 305-0801, JapanJP
  2. 2.Department of Polymer Chemistry, Kyoto University, Kyoto 606-8501, JapanJP
  3. 3.Department of Applied Chemistry, Nagoya University, Nagoya 464-8603, JapanJP
  4. 4.Neutron Scattering Laboratory, ISSP, The University of Tokyo, Tokai, Ibaraki 319-1106, JapanJP
  5. 5.Institute for Fundamental Research of Organic Chemistry, Kyushu University, Fukuoka 812-8581, JapanJP
  6. 6.Physics Department, Tohoku University, Sendai 980-8578, JapanJP
  7. 7.Research Reactor Institute, Kyoto University, Kumatori, Osaka 590-0494, JapanJP
  8. 8.Department of Materials Science, University of Shiga Prefecture, Hikone 522-8533, JapanJP

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