Bulletin of the American Physical Society
64th Annual Meeting of the APS Division of Plasma Physics
Volume 67, Number 15
Monday–Friday, October 17–21, 2022; Spokane, Washington
Session UO04: ICF: Compression and Burn IV
2:00 PM–5:00 PM,
Thursday, October 20, 2022
Room: Ballroom 111 A
Chair: Maria Gatu-Johnson, MIT
Abstract: UO04.00010 : Progress in the Understanding of Primary Neutron Spectra Moments*
3:48 PM–4:00 PM
Presenter:
Brian Appelbe
(Imperial College London)
Authors:
Brian Appelbe
(Imperial College London)
Aidan C Crilly
(Imperial College London)
Jeremy P Chittenden
(Imperial College London)
Chad J Forrest
(Laboratory for Laser Energetics, University of Rochester)
Sean P Regan
(Laboratory for Laser Energetics, University of Rochester)
Maria Gatu Johnson
(MIT)
Alastair S Moore
(Lawrence Livermore Natl Lab)
David J Schlossberg
(Lawrence Livermore Natl Lab)
This work reports on recent progress in the modelling of spectra moments and the underlying physics. There are two main results. First, further characterization of the non-Maxwellian ion distributions is achieved by calculating moments of orders beyond the first and second. Secondly, the moment method is also incorporated into a time-of-flight analysis to include the effects of temporal variations during the stagnation phase. It is shown that time-of-flight detectors at multiple distances from the target could be used to calculate the correlation of ion temperature with time. This correlation can be used as a metric of implosion performance.
*This material is based upon work supported by the Department of Energy National Nuclear Security Administration under Award Number DE-NA0003856
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