Energy confinement in a wall-confined spheromak plasma

G. Craddock, D. C. Barnes, D. Nystrom, G. Bourianoff, J. McBride

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The MIIF concept uses impact techniques to produce a quasi-spherical compression of magnetized wall-confined plasma (β≫ 1), yielding thermonuclear conditions with impact velocities of a few 10 km/s. Scalings of the energy confinement time have been estimated for this wall-confined spheromak plasma. Numerical and analytic results have been obtained for the ion-thermal-transport-dominated interior, showing that the magnetic field decreases thermal transport. Analytic estimates have indicated that anomalous (turbulent) transport effects are important in the colder edge, near the wall, where resistive interchange modes, rippling modes, and drift waves dominate classical ion transport. The MIIF plasma would thus lose energy quickly at the edge, leaving behind a longer confined hot core.

Original languageEnglish
Title of host publicationIEEE Int Conf Plasma Sci 1988
PublisherPubl by IEEE
Pages126
Number of pages1
Publication statusPublished - 1988
EventIEEE International Conference on Plasma Science - 1988 - Seattle, WA, USA
Duration: Jun 6 1988Jun 8 1988

Other

OtherIEEE International Conference on Plasma Science - 1988
CitySeattle, WA, USA
Period6/6/886/8/88

Fingerprint

Plasma confinement
Plasmas
Ions
Interchanges
Magnetic fields
Hot Temperature

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Craddock, G., Barnes, D. C., Nystrom, D., Bourianoff, G., & McBride, J. (1988). Energy confinement in a wall-confined spheromak plasma. In IEEE Int Conf Plasma Sci 1988 (pp. 126). Publ by IEEE.

Energy confinement in a wall-confined spheromak plasma. / Craddock, G.; Barnes, D. C.; Nystrom, D.; Bourianoff, G.; McBride, J.

IEEE Int Conf Plasma Sci 1988. Publ by IEEE, 1988. p. 126.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Craddock, G, Barnes, DC, Nystrom, D, Bourianoff, G & McBride, J 1988, Energy confinement in a wall-confined spheromak plasma. in IEEE Int Conf Plasma Sci 1988. Publ by IEEE, pp. 126, IEEE International Conference on Plasma Science - 1988, Seattle, WA, USA, 6/6/88.
Craddock G, Barnes DC, Nystrom D, Bourianoff G, McBride J. Energy confinement in a wall-confined spheromak plasma. In IEEE Int Conf Plasma Sci 1988. Publ by IEEE. 1988. p. 126
Craddock, G. ; Barnes, D. C. ; Nystrom, D. ; Bourianoff, G. ; McBride, J. / Energy confinement in a wall-confined spheromak plasma. IEEE Int Conf Plasma Sci 1988. Publ by IEEE, 1988. pp. 126
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AB - The MIIF concept uses impact techniques to produce a quasi-spherical compression of magnetized wall-confined plasma (β≫ 1), yielding thermonuclear conditions with impact velocities of a few 10 km/s. Scalings of the energy confinement time have been estimated for this wall-confined spheromak plasma. Numerical and analytic results have been obtained for the ion-thermal-transport-dominated interior, showing that the magnetic field decreases thermal transport. Analytic estimates have indicated that anomalous (turbulent) transport effects are important in the colder edge, near the wall, where resistive interchange modes, rippling modes, and drift waves dominate classical ion transport. The MIIF plasma would thus lose energy quickly at the edge, leaving behind a longer confined hot core.

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