Tailoring the energy resolution of MIRACLES, the time-of-flight – backscattering spectrometer at the ESS: An updated proposal for the chopper cascade

Paula Luna; Heloisa N. Bordallo; Nikolaos Tsapatsaris; Ken H. Andersen; Iñigo Herranz; Fernando Sordo; Félix J. Villacorta

doi:10.1016/j.physb.2018.12.001

Tailoring the energy resolution of MIRACLES, the time-of-flight – backscattering spectrometer at the ESS: An updated proposal for the chopper cascade

Paula Luna, Heloisa N. Bordallo, Nikolaos Tsapatsaris, Ken H. Andersen, Iñigo Herranz, Fernando Sordo, Félix J. Villacorta^*

^*Corresponding author for this work

Xray and Neutron Science

4 Citations (Scopus)

Abstract

A cost-effective chopper layout for the chopper cascade of MIRACLES, the time-of-flight backscattering spectrometer of the European Spallation Source is described. The main driving force is the capability to display a versatile and flexible selection of configuration modes, taking advantage of the long ESS pulse and tailoring the instrument resolution ad hoc, and covering a broad range of observation times from 10 ps to the ns. A key element for the design here presented is the feasibility to reach an energy resolution contribution from the incident neutron beam of ∼1.2 μeV, while keeping the same performance of MIRACLES conceptual design. The present optimized concept results in a well-balanced combination with the contribution from the secondary spectrometer time-of-flight energy resolution, yielding a total energy resolution of 2 μeV at best, and 2.5 μeV when the primary and secondary spectrometer contributions are matched.

Original language	English
Journal	Physica B: Condensed Matter
Volume	564
Pages (from-to)	64-68
Number of pages	5
ISSN	0921-4526
DOIs	https://doi.org/10.1016/j.physb.2018.12.001
Publication status	Published - 3 Apr 2019

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Tailoring the energy resolution of MIRACLES, the time-of-flight – backscattering spectrometer at the ESS : An updated proposal for the chopper cascade. / Luna, Paula; Bordallo, Heloisa N.; Tsapatsaris, Nikolaos et al.

In: Physica B: Condensed Matter, Vol. 564, 03.04.2019, p. 64-68.

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title = "Tailoring the energy resolution of MIRACLES, the time-of-flight – backscattering spectrometer at the ESS: An updated proposal for the chopper cascade",

abstract = "A cost-effective chopper layout for the chopper cascade of MIRACLES, the time-of-flight backscattering spectrometer of the European Spallation Source is described. The main driving force is the capability to display a versatile and flexible selection of configuration modes, taking advantage of the long ESS pulse and tailoring the instrument resolution ad hoc, and covering a broad range of observation times from 10 ps to the ns. A key element for the design here presented is the feasibility to reach an energy resolution contribution from the incident neutron beam of ∼1.2 μeV, while keeping the same performance of MIRACLES conceptual design. The present optimized concept results in a well-balanced combination with the contribution from the secondary spectrometer time-of-flight energy resolution, yielding a total energy resolution of 2 μeV at best, and 2.5 μeV when the primary and secondary spectrometer contributions are matched.",

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T2 - An updated proposal for the chopper cascade

AU - Luna, Paula

AU - Bordallo, Heloisa N.

AU - Tsapatsaris, Nikolaos

AU - Andersen, Ken H.

AU - Herranz, Iñigo

AU - Sordo, Fernando

AU - Villacorta, Félix J.

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N2 - A cost-effective chopper layout for the chopper cascade of MIRACLES, the time-of-flight backscattering spectrometer of the European Spallation Source is described. The main driving force is the capability to display a versatile and flexible selection of configuration modes, taking advantage of the long ESS pulse and tailoring the instrument resolution ad hoc, and covering a broad range of observation times from 10 ps to the ns. A key element for the design here presented is the feasibility to reach an energy resolution contribution from the incident neutron beam of ∼1.2 μeV, while keeping the same performance of MIRACLES conceptual design. The present optimized concept results in a well-balanced combination with the contribution from the secondary spectrometer time-of-flight energy resolution, yielding a total energy resolution of 2 μeV at best, and 2.5 μeV when the primary and secondary spectrometer contributions are matched.

AB - A cost-effective chopper layout for the chopper cascade of MIRACLES, the time-of-flight backscattering spectrometer of the European Spallation Source is described. The main driving force is the capability to display a versatile and flexible selection of configuration modes, taking advantage of the long ESS pulse and tailoring the instrument resolution ad hoc, and covering a broad range of observation times from 10 ps to the ns. A key element for the design here presented is the feasibility to reach an energy resolution contribution from the incident neutron beam of ∼1.2 μeV, while keeping the same performance of MIRACLES conceptual design. The present optimized concept results in a well-balanced combination with the contribution from the secondary spectrometer time-of-flight energy resolution, yielding a total energy resolution of 2 μeV at best, and 2.5 μeV when the primary and secondary spectrometer contributions are matched.

U2 - 10.1016/j.physb.2018.12.001

DO - 10.1016/j.physb.2018.12.001

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EP - 68

JO - Physica B: Physics of Condensed Matter & C: Atomic, Molecular and Plasma Physics, Optics

JF - Physica B: Physics of Condensed Matter & C: Atomic, Molecular and Plasma Physics, Optics

ER -

Tailoring the energy resolution of MIRACLES, the time-of-flight – backscattering spectrometer at the ESS: An updated proposal for the chopper cascade

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