Wavelength frame multiplication for reflectometry at long-pulse neutron sources

Löhmann, OliverTechnical University of Darmstadt,European Spallation Source ESS AB (författare)

The European Spallation Source (ESS), which is under construction in Lund (Sweden), will be the next leading neutron facility with an unprecedented brilliance and novel long-pulse time structure. A long-pulse source not only provides a high time-average flux but also opens the possibility to tune the resolution by using pulse shaping choppers. Thus, an instrument can readily be operated in either a high flux or a high resolution mode. Several of the shorter instruments at the ESS will employ Wavelength Frame Multiplication (WFM) in order to enable a sufficient resolution while offering a continuous and broad wavelength range. A test beamline was operated until the end of 2019 at the research reactor in Berlin to test components and methods, including WFM, in order to prepare the new facility for the operation of neutron instruments and successful first science. We herein demonstrate the implementation of WFM for reflectometry. By selecting a short pulse mode under the same geometrical configuration, we compare and discuss the results for two reference samples. The reported experiments not only serve to prove the reliability of the WFM approach but also, for the first time, demonstrate the full instrument control, data acquisition and data reduction chain that will be implemented at the ESS.

Silvi, LucaHelmholtz Association of German Research Centers (författare)
Kadletz, Peter M.European Spallation Source ESS AB (författare)
Vaytet, NeilEuropean Spallation Source ESS AB (författare)
Arnold, OwenTessella Ltd,Rutherford Appleton Laboratory (författare)
Jones, Matthew D.Tessella Ltd,Rutherford Appleton Laboratory (författare)
Nilsson, JonasEuropean Spallation Source ESS AB (författare)
Hart, MichaelRutherford Appleton Laboratory (författare)
Richter, TobiasEuropean Spallation Source ESS AB (författare)
Von Klitzing, RegineTechnical University of Darmstadt (författare)
Jackson, Andrew J.Lund University,Lunds universitet,Fysikalisk kemi,Enheten för fysikalisk och teoretisk kemi,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Physical Chemistry,Physical and theoretical chemistry,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH,European Spallation Source ESS AB(Swepub:lu)fkem-ajo (författare)
Arnold, ThomasDiamond Light Source,University of Bath,Rutherford Appleton Laboratory,European Spallation Source ESS AB (författare)
Woracek, RobinEuropean Spallation Source ESS AB (författare)
Technical University of DarmstadtEuropean Spallation Source ESS AB (creator_code:org_t)

Av författaren/redakt...: Löhmann, Oliver; Silvi, Luca; Kadletz, Peter M ...; Vaytet, Neil; Arnold, Owen; Jones, Matthew D ...; visa fler...; Nilsson, Jonas; Hart, Michael; Richter, Tobias; Von Klitzing, Re ...; Jackson, Andrew ...; Arnold, Thomas; Woracek, Robin; visa färre...

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