Abstract
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.
| Original language | English |
|---|---|
| Article number | 125111 |
| Journal | Review of Scientific Instruments |
| Volume | 91 |
| Issue number | 12 |
| Early online date | 21 Dec 2020 |
| DOIs | |
| Publication status | Published - 31 Dec 2020 |
Bibliographical note
Funding Information:We thank Helmholtz-Zentrum Berlin für Materialien und Energie for hosting the test beamline and providing neutrons. We would particularly like to thank Klaus Habicht for his support in hosting the test beamline. We warmly thank Heike Gast, Thomas Wilpert, Lutz Rossa, Konstantin Quoll, and Robby Kischnik for their outstanding support in several aspects at Helmholtz-Zentrum Berlin. V14 data were measured by Thomas Krist, and we would like to thank him for providing these data. We would also like to acknowledge Markus Strobl for initiating to operate the test beamline in order to conduct dedicated testing of various WFM modes, including reflectometry. Furthermore, we thank the divisions DMSC, ICS and MCAG of the ESS for the successful collaboration and in particular like to acknowledge contributions to NICOS by Michael Wedel, Michele Brambilla and Matt Clarke, support of the timing System and EPICS by Nicklas Holmberg and Douglas Bezerra Beniz, support of motion control by Torsten Bögershausen and Paul Barron, as well as streaming support by Afonso Mukai. Financial support was granted by BMBF via Verbundprojekt (Grant No. 05K2016).
Funding
We thank Helmholtz-Zentrum Berlin für Materialien und Energie for hosting the test beamline and providing neutrons. We would particularly like to thank Klaus Habicht for his support in hosting the test beamline. We warmly thank Heike Gast, Thomas Wilpert, Lutz Rossa, Konstantin Quoll, and Robby Kischnik for their outstanding support in several aspects at Helmholtz-Zentrum Berlin. V14 data were measured by Thomas Krist, and we would like to thank him for providing these data. We would also like to acknowledge Markus Strobl for initiating to operate the test beamline in order to conduct dedicated testing of various WFM modes, including reflectometry. Furthermore, we thank the divisions DMSC, ICS and MCAG of the ESS for the successful collaboration and in particular like to acknowledge contributions to NICOS by Michael Wedel, Michele Brambilla and Matt Clarke, support of the timing System and EPICS by Nicklas Holmberg and Douglas Bezerra Beniz, support of motion control by Torsten Bögershausen and Paul Barron, as well as streaming support by Afonso Mukai. Financial support was granted by BMBF via Verbundprojekt (Grant No. 05K2016).
ASJC Scopus subject areas
- Instrumentation