Tailored instrumentation for long-pulse neutron spallation sources

Schober, H.; Farhi, Emmanuel; Mezei, F.; Allenspach, P.; Andersen, K.H.; Bentley, Phillip M.; Christiansen, Peter Leth; Cubitt, B.; Heenan, Richard K.; Kulda, J.; Langan, Paul; Lefmann, Kim; Lieutenant, K.; Monkenbusch, M.; Willendrup, Peter Kjær; Šaroun, Jan; Tindemans, P.; Zsigmond, G.

doi:10.1016/j.nima.2008.01.102

Cited by 33 publications

(15 citation statements)

References 17 publications

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“…Many long-pulse instrument designs require a pulse-shaping chopper (or set of choppers) early in the guide system to define the time (and hence wavelength) resolution of the primary beam [22]. If several instruments would need to agree on a common pulse shaping opening time, this would compromise the instrument flexibility.…”

Section: Wavelength Bands Choppers and Resolutionmentioning

confidence: 99%

Neutron guide-split: A high performance guide bundle concept for elliptical guides

Holm

Rasmussen

Høpfner

et al. 2015

Nuclear Instruments and Methods in Physics Research Section A:

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Section: Wavelength Bands Choppers and Resolutionmentioning

confidence: 99%

Neutron guide-split: A high performance guide bundle concept for elliptical guides

Holm

Rasmussen

Høpfner

et al. 2015

Nuclear Instruments and Methods in Physics Research Section A:

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“…In the same spirit as Schober et al [Schober et al (2008)], it is convenient to consider several neutron-instrument classes in terms of their resolution characteristics. These categories are briefly described below, along with a summary of specific (yet by no means exhaustive) areas of scientific application:…”

Section: Neutron Instrumentation: Preliminary Considerationsmentioning

confidence: 99%

Baseline Design of a Low Energy Neutron Source at ESS-Bilbao

et al. 2014

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This article briefly describes the basic design of the ESS-Bilbao neutron target station as well as its expected neutronic performance. The baseline engineering design, associated ancillary systems, and plant layout for the facility is now complete. A rotating target composed of twenty beryllium plates has been selected as the best choice in terms of both neutron yield and engineering complexity. It will provide neutron beams with a source term of 10 15 n s −1 resulting from the direct 9 Be(p, xn) reaction using a 75 mA proton beam at 50 MeV. The design envisages a target station equipped with two fully optimized moderators capable of withstanding a proton-beam power of 112 kW. This design is flexible enough to accommodate future upgrades in final proton energy. The envisaged neutron-beam brightness will enable several applications, including the use of cold and thermal neutrons for condensed matter research as well as fast-neutron irradiation studies. We close by discussing the role that this facility may play once the European Spallation Source becomes operational in Lund, Sweden.

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“…Over the last decade or more, a number of authors have addressed the issue of long-pulse instrumentation [14][15][16][17] . The instrument concepts and designs simulated here are in general adapted from the earlier work, except that we have adjusted the instrument lengths as described below and listed in Table I.…”

Section: Design and Optimization Of Instrumentsmentioning

confidence: 99%

Simulation of a suite of generic long-pulse neutron instruments to optimize the time structure of the European Spallation Source

Lefmann

Klenø

Birk

et al. 2013

Review of Scientific Instruments

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We here describe the result of simulations of 15 generic neutron instruments for the long-pulsed European Spallation Source (ESS). All instruments have been simulated for 20 different settings of the source time structure, corresponding to pulse lengths between 1 ms and 2 ms; and repetition frequencies between 10 Hz and 25 Hz. The relative change in performance with time structure is given for each instrument, and an unweighted average is calculated. The performance of the instrument suite is proportional to a) the peak flux and b) the duty cycle to a power of approx. 0.3. This information is an important input to determining the best accelerator parameters. In addition, we find that in our simple guide systems, most neutrons reaching the sample originate from the central 3-5 cm of the moderator. This result can be used as an input in later optimization of the moderator design. We discuss the relevance and validity of defining a single Figure-ofMerit for a full facility and compare with evaluations of the individual instrument classes.

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Tailored instrumentation for long-pulse neutron spallation sources

Cited by 33 publications

References 17 publications

Neutron guide-split: A high performance guide bundle concept for elliptical guides

Neutron guide-split: A high performance guide bundle concept for elliptical guides

Baseline Design of a Low Energy Neutron Source at ESS-Bilbao

Simulation of a suite of generic long-pulse neutron instruments to optimize the time structure of the European Spallation Source

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