Thermonuclear ignition in inertial confinement fusion and comparison with magnetic confinement

R. Betti, P. Y. Chang, B. K. Spears, K. S. Anderson, J. Edwards, M. Fatenejad, J. D. Lindl, R. L. McCrory, R. Nora, D. Shvarts

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Abstract

The physics of thermonuclear ignition in inertial confinement fusion (ICF) is presented in the familiar frame of a Lawson-type criterion. The product of the plasma pressure and confinement time Pτ for ICF is cast in terms of measurable parameters and its value is estimated for cryogenic implosions. An overall ignition parameter including pressure, confinement time, and temperature is derived to complement the product Pτ. A metric for performance assessment should include both and Pτ. The ignition parameter and the product Pτ are compared between inertial and magnetic-confinement fusion. It is found that cryogenic implosions on OMEGA [T. R. Boehly, Opt. Commun. 133, 495 (1997)] have achieved P τ∼1.5 atm s comparable to large tokamaks such as the Joint European Torus [P. H. Rebut and B. E. Keen, Fusion Technol. 11, 13 (1987)] where Pτ∼1 atm s. Since OMEGA implosions are relatively cold (T∼2 keV), their overall ignition parameter ∼0.02-0.03 is ∼5× lower than in JET (∼0.13), where the average temperature is about 10 keV.

Original languageEnglish
Article number058102
JournalPhysics of Plasmas
Volume17
Issue number5
DOIs
Publication statusPublished - 2010 May 1

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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    Betti, R., Chang, P. Y., Spears, B. K., Anderson, K. S., Edwards, J., Fatenejad, M., Lindl, J. D., McCrory, R. L., Nora, R., & Shvarts, D. (2010). Thermonuclear ignition in inertial confinement fusion and comparison with magnetic confinement. Physics of Plasmas, 17(5), [058102]. https://doi.org/10.1063/1.3380857