Spallation Neutron Sources: New Capabilities for Research

Details Spallation Neutron Sources: New Capabilities for Research Spallation Neutron Sources: New Capabilities for Research

Oct 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aps..dnp.1wb01b&link_type=abstract

Geophysical Research Letters, v. 24, No. 17, p. 2119 (1997).

Physics

2756 Magnetospheric Physics, Planetary Magnetospheres (5443, 5737, 6030), 5421 Planetology: Solid Surface Planets, Interactions With Particles And Fields, 5719 Planetology: Fluid Planets, Interactions With Particles And Fields

Scientific paper

Neutron sources based on the release of neutrons from matter by bombardment with medium energy particles excel by several features, which are impossible or difficult to realize on reactors: they can deliver an extremely wide range of neutron energies from the GeV range all the way down to micro-eV, or even lower; neutrons can be generated with virtually any time structure from nanosecond pulses to practically continuously; and the flux levels obtainable during the pulses can exceed those of controlled fission-based sources by several orders of magnitude. Furthermore, the beams driving the sources can be simultaneously taken advantage of to generate pions and muons or to study radiation effects in materials. Last but not least the neutrinos released with a time structure following that of the neutron generation are of interest for fundamental studies. The paper will mainly deal with the aspects of neutron generation, spectral and temporal tailoring of the neutron flux and the main motivation for the current proposals of spallation neutron sources: improved research opportunities for condensed matter science. In this context different concepts of spallation neutron sources will be dealt with and their respective merits and limitations will be discussed, as well as their positioning relative to research reactors. Finally, an outlook will be given on what can be expected in terms of future development and what the limiting factors are, according to present knowledge.

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