Neutron source reconstruction using a generalized expectation-maximization algorithm on one-dimensional neutron images from the Z facility. Academic Article uri icon

abstract

  • Magnetized Liner Inertial Fusion experiments have been performed at the Z facility at Sandia National Laboratories. These experiments use deuterium fuel, which produces 2.45MeV neutrons on reaching thermonuclear conditions. To study the spatial structure of neutron production, the one-dimensional imager of neutrons diagnostic was fielded to record axial resolved neutron images. In this diagnostic, neutrons passing through a rolled edge aperture form an image on a CR-39-based solid state nuclear track detector. Here, we present a modified generalized expectation-maximization algorithm to reconstruct an axial neutron emission profile of the stagnated fusion plasma. We validate the approach by comparing the reconstructed neutron emission profile to an x-ray emission profile provided by a time-integrated pinhole camera.

published proceedings

  • Rev Sci Instrum

author list (cited authors)

  • Ricketts, S. A., Mangan, M. A., Volegov, P., Fittinghoff, D. N., Lewis, W. E., Mannion, O. M., ... Ampleford, D. J.

citation count

  • 0

complete list of authors

  • Ricketts, SA||Mangan, MA||Volegov, P||Fittinghoff, DN||Lewis, WE||Mannion, OM||Morel, JE||Adams, ML||Ampleford, DJ

publication date

  • March 2024