TY  - CONF
AU  - Voigt, J.
AU  - Zakalek, P.
AU  - Rücker, U.
AU  - Li, Jingjing
AU  - Ma, Zhanwen
AU  - Lieutenant, K.
AU  - Gutberlet, T.
AU  - Brückel, T.
TI  - Source requirements for spectrometers at low energy accelerator driven neutron facilities
M1  - FZJ-2021-03011
PY  - 2021
AB  - The shutdown of several national reactor driven neutron sources has stimulated intense research and development activities for successor facilities[1]. A promising technology is the neutron production by low energy nuclear reactions, that can be driven by accelerators operating in the particle energy range between 3 and 100 MeV. While the neutron yield of theses reactions is much lower than the neutron yield of the spallation reaction, the lower particle energy enables a very close coupling of the thermal and cryogenic moderators to the target and therefore small volume moderators with a high density of slow neutrons. On the other hand, the comparably low particle energies facilitate the shielding issue significantly and allow therefore neutron optical components in a distance as close as 50 cm from the thermal or cold moderator surfaces allowing the extraction of a reasonably divergent beam from the source, which can be efficiently transported to the sample by modern neutron optics. Therefore instruments, which require a large phase space, can benefit strongly from the characteristics of a low energy accelerator driven neutron facility (LENF). Among them are typically spectrometers of both direct and indirect geometry, which require typically relaxed spatial and angular resolution and a good energy resolution. Here we present source parameters that have been determined for different spectrometers employing thermal and cold neutrons.
T2  - QENS/WINS 2021
CY  - 17 May 2021 - 21 May 2021, online event (online event)
Y2  - 17 May 2021 - 21 May 2021
M2  - online event, online event
LB  - PUB:(DE-HGF)1
UR  - https://juser.fz-juelich.de/record/894057
ER  -