Numerical simulation study of the performance of a small neutron three axis spectrometer

Peter Kjær Willendrup; L.D. Cussen

doi:10.1016/j.nima.2011.01.118

Numerical simulation study of the performance of a small neutron three axis spectrometer

Peter Kjær Willendrup, L.D. Cussen

European Spallation Source ERIC

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

This article describes Monte Carlo computer simulations comparing the performances of a conventional neutron three axis spectrometer (TAS) and a micro-TAS, a μTAS, designed to be as compact as seems practical. The simulations show that the μTAS delivers performance (intensity at equal resolution) equivalent to that of a normal TAS. The μTAS should be very cheap to build and a “farm” of several such small machines at a single conventional instrument position should greatly increase the TAS beam time available from a given source. A μTAS can deliver significantly larger beam angular divergence at the sample and detector, thus extending the accessible resolution-intensity range, whether using flat or curved monochromating crystals.
Keyword: Neutron,McStas,Micro,Design study,TAS,Three-axis spectrometer

Original language	English
Journal	Nuclear Inst. and Methods in Physics Research, A
Volume	637
Issue number	1
Pages (from-to)	109-118
ISSN	0168-9002
DOIs	https://doi.org/10.1016/j.nima.2011.01.118
Publication status	Published - 2011
Externally published	Yes

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title = "Numerical simulation study of the performance of a small neutron three axis spectrometer",

abstract = "This article describes Monte Carlo computer simulations comparing the performances of a conventional neutron three axis spectrometer (TAS) and a micro-TAS, a μTAS, designed to be as compact as seems practical. The simulations show that the μTAS delivers performance (intensity at equal resolution) equivalent to that of a normal TAS. The μTAS should be very cheap to build and a “farm” of several such small machines at a single conventional instrument position should greatly increase the TAS beam time available from a given source. A μTAS can deliver significantly larger beam angular divergence at the sample and detector, thus extending the accessible resolution-intensity range, whether using flat or curved monochromating crystals. Keyword: Neutron,McStas,Micro,Design study,TAS,Three-axis spectrometer",

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AB - This article describes Monte Carlo computer simulations comparing the performances of a conventional neutron three axis spectrometer (TAS) and a micro-TAS, a μTAS, designed to be as compact as seems practical. The simulations show that the μTAS delivers performance (intensity at equal resolution) equivalent to that of a normal TAS. The μTAS should be very cheap to build and a “farm” of several such small machines at a single conventional instrument position should greatly increase the TAS beam time available from a given source. A μTAS can deliver significantly larger beam angular divergence at the sample and detector, thus extending the accessible resolution-intensity range, whether using flat or curved monochromating crystals. Keyword: Neutron,McStas,Micro,Design study,TAS,Three-axis spectrometer

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JF - Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

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Numerical simulation study of the performance of a small neutron three axis spectrometer

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