Neutron detectors for the ESS diffractometers

0474053 - ÚJF 2018 RIV GB eng J - Článek v odborném periodiku
Stefanescu, I. - Christensen, M. - Fenske, J. - Hall-Wilton, R. - Henry, P. F. - Kirstein, O. - Muller, M. - Nowak, G. - Pooley, D. - Raspino, D. - Rhodes, N. - Šaroun, Jan - Schefer, J. - Schooneveld, E. - Sykora, J. - Schweika, W.
Neutron detectors for the ESS diffractometers.
Journal of Instrumentation. Roč. 12, JAN (2017), č. článku P01019. ISSN 1748-0221. E-ISSN 1748-0221
Grant CEP: GA MŠMT LM2015048
Institucionální podpora: RVO:61389005
Klíčová slova: instrumentation for neutron sources * neutron diffraction detectors * neutron detectors (cold, thermal, fast neutrons)
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 1.258, rok: 2017

The ambitious instrument suite for the future European Spallation Source whose civil construction started recently in Lund, Sweden, demands a set of diverse and challenging requirements for the neutron detectors. For instance, the unprecedented high flux expected on the samples to be investigated in neutron diffraction or reflectometry experiments requires detectors that can handle high counting rates, while the investigation of sub-millimeter protein crystals will only be possible with large-area detectors that can achieve a position resolution as low as 200 mu m. This has motivated an extensive research and development campaign to advance the state-of-the-art detector and to find newtechnologies that can reach maturity by the time the ESS will operate at full potential. This paper presents the key detector requirements for three of the Time-of-Flight (TOF) diffraction instrument concepts selected by the Scientific Advisory Committee to advance into the phase of preliminary engineering design. We discuss the detector technologies commonly employed at the existing similar instruments and their major challenges for ESS. The detector technologies selected by the instrument teams to collect the diffraction patterns are also presented. Analytical calculations, Monte-Carlo simulations, and real experimental data are used to develop a generic method to estimate the event rate in the diffraction detectors. We apply this method to make predictions for the future diffraction instruments, and thus provide additional information that can help the instrument teams with the optimisation of the detector designs.
Trvalý link: http://hdl.handle.net/11104/0271150