This title appears in the Scientific Report :
2018
Please use the identifier:
http://dx.doi.org/10.1016/j.nima.2017.11.085 in citations.
Please use the identifier: http://hdl.handle.net/2128/16348 in citations.
Spectrometers for compact neutron sources
Spectrometers for compact neutron sources
We discuss the potential for neutron spectrometers at novel accelerator driven compact neutron sources. Such a High Brilliance Source (HBS) relies on low energy nuclear reactions, which enable cryogenic moderators in very close proximity to the target and neutron optics at comparably short distances...
Saved in:
Personal Name(s): | Voigt, J. (Corresponding author) |
---|---|
Böhm, S. / Dabruck, J. P. / Rücker, U. / Gutberlet, T. / Brückel, T. | |
Contributing Institute: |
Streumethoden; JCNS-2 JCNS-FRM-II; JCNS-FRM-II JARA-FIT; JARA-FIT Streumethoden; PGI-4 |
Published in: | Nuclear instruments & methods in physics research / A, 884 (2018) S. 59 - 63 |
Imprint: |
Amsterdam
North-Holland Publ. Co.
2018
|
DOI: |
10.1016/j.nima.2017.11.085 |
Document Type: |
Journal Article |
Research Program: |
Jülich Centre for Neutron Research (JCNS) Materials and Processes for Energy and Transport Technologies Quantum Condensed Matter: Magnetism, Superconductivity Controlling Collective States Controlling Collective States |
Subject (ZB): | |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/16348 in citations.
We discuss the potential for neutron spectrometers at novel accelerator driven compact neutron sources. Such a High Brilliance Source (HBS) relies on low energy nuclear reactions, which enable cryogenic moderators in very close proximity to the target and neutron optics at comparably short distances from the moderator compared to existing sources. While the first effect aims at increasing the phase space density of a moderator, the second allows the extraction of a large phase space volume, which is typically requested for spectrometer applications. We find that competitive spectrometers can be realized if (a) the neutron production rate can be synchronized with the experiment repetition rate and (b) the emission characteristics of the moderator can be matched to the phase space requirements of the experiment. MCNP simulations for protons or deuterons on a Beryllium target with a suitable target/moderator design yield a source brightness, from which we calculate the sample fluxes by phase space considerations for different types of spectrometers. These match closely the figures of todays spectrometers at medium flux sources. Hence we conclude that compact neutron sources might be a viable option for next generation neutron sources |