Published in

American Institute of Physics, Review of Scientific Instruments, 11(87), p. 11E715

DOI: 10.1063/1.4960065

Links

Tools

Export citation

Search in Google Scholar

Fluence-compensated down-scattered neutron imaging using the neutron imaging system at the National Ignition Facility

Journal article published in 2016 by D. T. Casey, P. L. Volegov ORCID, F. E. Merrill ORCID, D. H. Munro ORCID, G. P. Grim, O. L. Landen ORCID, B. K. Spears, D. N. Fittinghoff, J. E. Field, V. A. Smalyuk
This paper was not found in any repository, but could be made available legally by the author.
This paper was not found in any repository, but could be made available legally by the author.

Full text: Unavailable

Green circle
Preprint: archiving allowed
Upload
Green circle
Postprint: archiving allowed
Upload
Orange circle
Published version: archiving restricted
Upload
Policy details
Data provided by SHERPA/RoMEO

Abstract

The Neutron Imaging System at the National Ignition Facility is used to observe the primary ∼14 MeV neutrons from the hotspot and down-scattered neutrons (6-12 MeV) from the assembled shell. Due to the strong spatial dependence of the primary neutron fluence through the dense shell, the down-scattered image is convolved with the primary-neutron fluence much like a backlighter profile. Using a characteristic scattering angle assumption, we estimate the primary neutron fluence and compensate the down-scattered image, which reveals information about asymmetry that is otherwise difficult to extract without invoking complicated models.