AMATERAS: A Cold-Neutron Disk Chopper Spectrometer
نویسندگان
چکیده
منابع مشابه
The new cold neutron chopper spectrometer at the Spallation Neutron Source: design and performance.
The design and performance of the new cold neutron chopper spectrometer (CNCS) at the Spallation Neutron Source in Oak Ridge are described. CNCS is a direct-geometry inelastic time-of-flight spectrometer, designed essentially to cover the same energy and momentum transfer ranges as IN5 at ILL, LET at ISIS, DCS at NIST, TOFTOF at FRM-II, AMATERAS at J-PARC, PHAROS at LANSCE, and NEAT at HZB, at ...
متن کاملThe Disk Chopper Spectrometer at NIST: a new instrument for quasielastic neutron scattering studies
We describe the Disk Chopper Spectrometer (DCS) at the NIST Center for Neutron Research (NCNR). The maximum measured flux at the sample, averaged over the 3 cm width and 10 cm height of the beam, with all choppers turning at 20,000 revolutions per minute and phased to transmit neutrons through the widest slots on each disk, is approximately 3 10 n cm 2 s . In this configuration the elastic reso...
متن کاملA Programmable Dsp-based Neutron-chopper Simulator
Neutron choppers at spallation-neutron facilities are rotating devices that are precisely phased to chop a neutron beam. Depending on the mass, moment-ofinertia, and velocity of rotation, a chopper can have a large amount of stored kinetic energy. For example, the PHAROS T-zero chopper at the LANSCE facility at Los Alamos National Laboratory has a rotating kinetic energy of over 1 MJ. When ener...
متن کاملDesign and operation of the wide angular-range chopper spectrometer ARCS at the Spallation Neutron Source.
The wide angular-range chopper spectrometer ARCS at the Spallation Neutron Source (SNS) is optimized to provide a high neutron flux at the sample position with a large solid angle of detector coverage. The instrument incorporates modern neutron instrumentation, such as an elliptically focused neutron guide, high speed magnetic bearing choppers, and a massive array of (3)He linear position sensi...
متن کاملAtomic pair distribution function analysis from the ARCS chopper spectrometer at the Spallation Neutron Source
Neutron powder diffraction based atomic pair distribution functions (PDFs) are reported from the new wide angular-range chopper spectrometer ARCS at the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory (ORNL). The spectrometer was run in white-beam mode with no Fermi chopper. The PDF patterns of Ni and Al2O3 were refined using the PDFfit method and the results compared to data c...
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ژورنال
عنوان ژورنال: Journal of the Physical Society of Japan
سال: 2011
ISSN: 0031-9015,1347-4073
DOI: 10.1143/jpsjs.80sb.sb028