SEQUOIA: A Newly Operating Chopper Spectrometer at the SNS
نویسندگان
چکیده
منابع مشابه
The 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 کاملElectromagnetic Modeling of Fast Beam Chopper for Sns Project
High current and stringent restrictions on beam losses in the designed linac and storage ring for the Spallation Neutron Source (SNS) require clean and fast – with the rise time from 2% to 98% less than 2.5 ns – beam chopping in the linac front end, at the beam energy 2.5 MeV. The development of new traveling-wave deflecting current structures, based on meander lines, for the SNS fast chopper i...
متن کاملMeander-line Current Structure Development for Sns Fast Chopper
A new current structure for the fast traveling-wave 2.5MeV beam chopper in the front end of the Spallation Neutron Source (SNS) has been suggested in [1]. The structure is based on the meander-folded notched stripline with dielectric supports and separators. Its design has been optimized using electromagnetic 3-D modeling with the MAFIA code package to provide rise and fall times in the range o...
متن کاملQuantitative structure refinement from the ARCS chopper spectrometer
The new wide angular-range chopper spectrometer ARCS at the Spallation Neutron Source at Oak Ridge National Laboratory has been successfully used in whitebeam mode, with no Fermi chopper, to obtain neutron powder diffraction based atomic pair distribution functions (PDFs). Obtained PDF patterns of Si, Ni, and Al2O3 were refined using the PDFfit method and the results compared to data collected ...
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...
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ژورنال
عنوان ژورنال: Journal of Physics: Conference Series
سال: 2010
ISSN: 1742-6596
DOI: 10.1088/1742-6596/251/1/012058