Upgrade project NEAT02016 at Helmholtz Zentrum Berlin – What can be done on the medium power neutron source

  • The neutron time-of-flight spectrometer NEAT has a long history of successful applications and is best suited to probe dynamic phenomena directly in the large time domain 10(-14) - 10(-10) s and on the length scale ranging from 0.05 to up to about 5 nm. To address user community needs for more powerful instrumental capabilities, a concept of the full upgrade of NEAT has been proposed. The upgrade started in 2010 after a rigorous internal and external selection process and resulted in 300-fold neutron count rate increase compared to NEAT01995. Combined with new instrumental and sample environmental capabilities the upgrade allows NEAT to maintain itself at the best world class level and provide an outstanding experimental tool for a broad range of scientific applications. The advanced features of the new instrument include an integrated guide-chopper system that delivers neutrons with flexible beam properties: either highly homogeneous beam with low divergence suitable for singleThe neutron time-of-flight spectrometer NEAT has a long history of successful applications and is best suited to probe dynamic phenomena directly in the large time domain 10(-14) - 10(-10) s and on the length scale ranging from 0.05 to up to about 5 nm. To address user community needs for more powerful instrumental capabilities, a concept of the full upgrade of NEAT has been proposed. The upgrade started in 2010 after a rigorous internal and external selection process and resulted in 300-fold neutron count rate increase compared to NEAT01995. Combined with new instrumental and sample environmental capabilities the upgrade allows NEAT to maintain itself at the best world class level and provide an outstanding experimental tool for a broad range of scientific applications. The advanced features of the new instrument include an integrated guide-chopper system that delivers neutrons with flexible beam properties: either highly homogeneous beam with low divergence suitable for single crystals studies or "hot-spot" neutron distribution serving best small samples. Substantial increase of the detector angle coverage is achieved by using 416 He-3 position sensitive detectors. Placed at 3m from the sample, the detectors cover 20m(2) area and are equipped with modern electronics and DAQ using event recording techniques. The installation of hardware has been completed in June 2016 and on January 23, 2017 NEAT has welcomed its first regular users who took advantage of the high counting rate, broad available range of incoming neutron wavelengths and high flexibility of NEAT. Here we present details of NEAT upgrade, measured instrument characteristics and show first experimental results.zeige mehrzeige weniger

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  • NEAT-upgrade accepted formated Physica B.pdf
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Autor*innen:Moritz-Caspar Schlegel, M. Russina, G. Günther, V. Grzimek, R. Gainov, L. Drescher, T. Kaulich, W. Graf, B. Urban, A. Daske, K. Grotjahn, R. Hellhammer, G. Buchert, H. Kutz, L. Rossa, O.-P. Sauer, M. Fromme, D. Wallacher, K. Kiefer, B. Klemke, N. Grimm, S. Gerischer, N. Tsapatsaris, K. Rolfs
Dokumenttyp:Zeitschriftenartikel
Veröffentlichungsform:Verlagsliteratur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):Physica B: Condensed Matter
Jahr der Erstveröffentlichung:2017
Verlag:Elsevier B.V.
Jahrgang/Band:551
Erste Seite:506
Letzte Seite:511
DDC-Klassifikation:Naturwissenschaften und Mathematik / Chemie / Analytische Chemie
Freie Schlagwörter:Instrumentation; Nanoscale dynamics; Neutron scattering; Neutron spectroscopy; Time-of-flight neutron spectroscopy
DOI:10.1016/j.physb.2017.12.026
ISSN:0921-4526
Verfügbarkeit des Dokuments:Datei im Netzwerk der BAM verfügbar ("Closed Access")
Datum der Freischaltung:20.12.2017
Referierte Publikation:Ja
Datum der Eintragung als referierte Publikation:21.01.2019
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