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Understanding fuel magnetization and mix using secondary nuclear reactions in magneto-inertial fusion.
Schmit, P F; Knapp, P F; Hansen, S B; Gomez, M R; Hahn, K D; Sinars, D B; Peterson, K J; Slutz, S A; Sefkow, A B; Awe, T J; Harding, E; Jennings, C A; Chandler, G A; Cooper, G W; Cuneo, M E; Geissel, M; Harvey-Thompson, A J; Herrmann, M C; Hess, M H; Johns, O; Lamppa, D C; Martin, M R; McBride, R D; Porter, J L; Robertson, G K; Rochau, G A; Rovang, D C; Ruiz, C L; Savage, M E; Smith, I C; Stygar, W A; Vesey, R A.
  • Schmit PF; Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185-1186, USA.
  • Knapp PF; Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185-1186, USA.
  • Hansen SB; Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185-1186, USA.
  • Gomez MR; Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185-1186, USA.
  • Hahn KD; Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185-1186, USA.
  • Sinars DB; Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185-1186, USA.
  • Peterson KJ; Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185-1186, USA.
  • Slutz SA; Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185-1186, USA.
  • Sefkow AB; Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185-1186, USA.
  • Awe TJ; Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185-1186, USA.
  • Harding E; Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185-1186, USA.
  • Jennings CA; Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185-1186, USA.
  • Chandler GA; Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185-1186, USA.
  • Cooper GW; Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185-1186, USA.
  • Cuneo ME; Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185-1186, USA.
  • Geissel M; Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185-1186, USA.
  • Harvey-Thompson AJ; Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185-1186, USA.
  • Herrmann MC; Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185-1186, USA.
  • Hess MH; Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185-1186, USA.
  • Johns O; Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185-1186, USA.
  • Lamppa DC; Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185-1186, USA.
  • Martin MR; Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185-1186, USA.
  • McBride RD; Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185-1186, USA.
  • Porter JL; Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185-1186, USA.
  • Robertson GK; Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185-1186, USA.
  • Rochau GA; Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185-1186, USA.
  • Rovang DC; Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185-1186, USA.
  • Ruiz CL; Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185-1186, USA.
  • Savage ME; Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185-1186, USA.
  • Smith IC; Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185-1186, USA.
  • Stygar WA; Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185-1186, USA.
  • Vesey RA; Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185-1186, USA.
Phys Rev Lett ; 113(15): 155004, 2014 Oct 10.
Article en En | MEDLINE | ID: mdl-25375715
ABSTRACT
Magnetizing the fuel in inertial confinement fusion relaxes ignition requirements by reducing thermal conductivity and changing the physics of burn product confinement. Diagnosing the level of fuel magnetization during burn is critical to understanding target performance in magneto-inertial fusion (MIF) implosions. In pure deuterium fusion plasma, 1.01 MeV tritons are emitted during deuterium-deuterium fusion and can undergo secondary deuterium-tritium reactions before exiting the fuel. Increasing the fuel magnetization elongates the path lengths through the fuel of some of the tritons, enhancing their probability of reaction. Based on this feature, a method to diagnose fuel magnetization using the ratio of overall deuterium-tritium to deuterium-deuterium neutron yields is developed. Analysis of anisotropies in the secondary neutron energy spectra further constrain the measurement. Secondary reactions also are shown to provide an upper bound for the volumetric fuel-pusher mix in MIF. The analysis is applied to recent MIF experiments [M. R. Gomez et al., Phys. Rev. Lett. 113, 155003 (2014)] on the Z Pulsed Power Facility, indicating that significant magnetic confinement of charged burn products was achieved and suggesting a relatively low-mix environment. Both of these are essential features of future ignition-scale MIF designs.
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Banco de datos: MEDLINE Idioma: En Año: 2014 Tipo del documento: Article
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Banco de datos: MEDLINE Idioma: En Año: 2014 Tipo del documento: Article