TY - JOUR
T1 - Instrumental design and performance of a new pulsed-neutron reflectometer (ARISA) at KENS for studying free surfaces
AU - Torikai, N.
AU - Furusaka, M.
AU - Matsuoka, H.
AU - Matsushita, Y.
AU - Shibayama, M.
AU - Takahara, A.
AU - Takeda, M.
AU - Tasaki, S.
AU - Yamaoka, H.
PY - 2002/12
Y1 - 2002/12
N2 - 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.
AB - 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.
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U2 - 10.1007/s003390101095
DO - 10.1007/s003390101095
M3 - Article
AN - SCOPUS:0036999409
SN - 0947-8396
VL - 74
SP - S264-S266
JO - Applied Physics A: Materials Science and Processing
JF - Applied Physics A: Materials Science and Processing
IS - SUPPL.I
ER -