The new cold neutron chopper spectrometer at the Spallation Neutron Source: Design and performance

被引：228

作者：

Ehlers, G. ^{[1
]}

Podlesnyak, A. A. ^{[1
]}

Niedziela, J. L. ^{[1
]}

Iverson, E. B. ^{[1
]}

Sokol, P. E. ^{[2
]}

机构：

[1] Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA

[2] Indiana Univ, Dept Phys, Bloomington, IN 47405 USA

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 2011年 / 82卷 / 08期

关键词：

FREQUENCIES;

D O I：

10.1063/1.3626935

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

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 similar energy resolution. Measured values of key figures such as neutron flux at sample position and energy resolution are compared between measurements and ray tracing Monte Carlo simulations, and good agreement (better than 20% of absolute numbers) has been achieved. The instrument performs very well in the cold and thermal neutron energy ranges, and promises to become a workhorse for the neutron scattering community for quasielastic and inelastic scattering experiments. (C) 2011 American Institute of Physics. [doi:10.1063/1.3626935]

引用

页数：6

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