Gains from the upgrade of the cold neutron triple-axis spectrometer FLEXX at the BER-II reactor

Duy M. Le; D. L. Quintero-Castro; Rasmus Toft-Petersen; Felix Groitl; Markos Skoulatos; K. C. Rule; Klaus Habicht

doi:10.1016/j.nima.2013.07.007

Gains from the upgrade of the cold neutron triple-axis spectrometer FLEXX at the BER-II reactor

Duy M. Le, D. L. Quintero-Castro, Rasmus Toft-Petersen, Felix Groitl, Markos Skoulatos, K. C. Rule, Klaus Habicht

Helmholtz Centre Berlin for Materials and Energy

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

Abstract

The upgrade of the cold neutron triple-axis spectrometer FLEXX is described. We discuss the characterisation of the gains from the new primary spectrometer, including a larger guide and double focussing monochromator, and present measurements of the energy and momentum resolution and of the neutron flux of the instrument. We found an order of magnitude gain in intensity (at the cost of coarser momentum resolution), and that the incoherent elastic energy widths are measurably narrower than before the upgrade. The much improved count rate should allow the use of smaller single crystals samples and thus enable the upgraded FLEXX spectrometer to continue making leading edge measurements.

Original language	English
Journal	Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	729
Pages (from-to)	220-226
Number of pages	7
ISSN	0168-9002
DOIs	https://doi.org/10.1016/j.nima.2013.07.007
Publication status	Published - 2013
Externally published	Yes

Keywords

Neutron instrumentation
Inelastic neutron spectroscopy
Triple-axis spectroscopy
Neutron guide system

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Le, D. M., Quintero-Castro, D. L., Toft-Petersen, R., Groitl, F., Skoulatos, M., Rule, K. C., & Habicht, K. (2013). Gains from the upgrade of the cold neutron triple-axis spectrometer FLEXX at the BER-II reactor. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 729, 220-226. https://doi.org/10.1016/j.nima.2013.07.007

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title = "Gains from the upgrade of the cold neutron triple-axis spectrometer FLEXX at the BER-II reactor",

abstract = "The upgrade of the cold neutron triple-axis spectrometer FLEXX is described. We discuss the characterisation of the gains from the new primary spectrometer, including a larger guide and double focussing monochromator, and present measurements of the energy and momentum resolution and of the neutron flux of the instrument. We found an order of magnitude gain in intensity (at the cost of coarser momentum resolution), and that the incoherent elastic energy widths are measurably narrower than before the upgrade. The much improved count rate should allow the use of smaller single crystals samples and thus enable the upgraded FLEXX spectrometer to continue making leading edge measurements.",

keywords = "Neutron instrumentation, Inelastic neutron spectroscopy, Triple-axis spectroscopy, Neutron guide system",

author = "Le, {Duy M.} and Quintero-Castro, {D. L.} and Rasmus Toft-Petersen and Felix Groitl and Markos Skoulatos and Rule, {K. C.} and Klaus Habicht",

year = "2013",

doi = "10.1016/j.nima.2013.07.007",

language = "English",

volume = "729",

pages = "220--226",

journal = "Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment",

issn = "0168-9002",

publisher = "Elsevier",

}

Le, DM, Quintero-Castro, DL, Toft-Petersen, R, Groitl, F, Skoulatos, M, Rule, KC & Habicht, K 2013, 'Gains from the upgrade of the cold neutron triple-axis spectrometer FLEXX at the BER-II reactor', Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 729, pp. 220-226. https://doi.org/10.1016/j.nima.2013.07.007

Gains from the upgrade of the cold neutron triple-axis spectrometer FLEXX at the BER-II reactor. / Le, Duy M.; Quintero-Castro, D. L.; Toft-Petersen, Rasmus et al.
In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 729, 2013, p. 220-226.

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

TY - JOUR

T1 - Gains from the upgrade of the cold neutron triple-axis spectrometer FLEXX at the BER-II reactor

AU - Le, Duy M.

AU - Quintero-Castro, D. L.

AU - Toft-Petersen, Rasmus

AU - Groitl, Felix

AU - Skoulatos, Markos

AU - Rule, K. C.

AU - Habicht, Klaus

PY - 2013

Y1 - 2013

N2 - The upgrade of the cold neutron triple-axis spectrometer FLEXX is described. We discuss the characterisation of the gains from the new primary spectrometer, including a larger guide and double focussing monochromator, and present measurements of the energy and momentum resolution and of the neutron flux of the instrument. We found an order of magnitude gain in intensity (at the cost of coarser momentum resolution), and that the incoherent elastic energy widths are measurably narrower than before the upgrade. The much improved count rate should allow the use of smaller single crystals samples and thus enable the upgraded FLEXX spectrometer to continue making leading edge measurements.

AB - The upgrade of the cold neutron triple-axis spectrometer FLEXX is described. We discuss the characterisation of the gains from the new primary spectrometer, including a larger guide and double focussing monochromator, and present measurements of the energy and momentum resolution and of the neutron flux of the instrument. We found an order of magnitude gain in intensity (at the cost of coarser momentum resolution), and that the incoherent elastic energy widths are measurably narrower than before the upgrade. The much improved count rate should allow the use of smaller single crystals samples and thus enable the upgraded FLEXX spectrometer to continue making leading edge measurements.

KW - Neutron instrumentation

KW - Inelastic neutron spectroscopy

KW - Triple-axis spectroscopy

KW - Neutron guide system

U2 - 10.1016/j.nima.2013.07.007

DO - 10.1016/j.nima.2013.07.007

M3 - Journal article

SN - 0168-9002

VL - 729

SP - 220

EP - 226

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

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

ER -

Gains from the upgrade of the cold neutron triple-axis spectrometer FLEXX at the BER-II reactor

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Keywords

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