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Tridimensional Igniting Structures in Fusion Burning Plasmas*

Author: A. Cardinali
Requested Type: Consider for Invited
Submitted: 2015-01-09 13:09:59

Co-authors: B. Coppi, G. Sonnino

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MIT
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Abstract Text:
A surprising result of the most recent theory [1] of the thermonuclear instability, which can take place in D-T plasmas close to ignition, is that it can develop with tridimensional structures emerging from an axisymmetric toroidal confinement configurations. These structures are helical filaments (“snakes”) that are localized radially around a given rational magnetic surface [2]. Until now well known analyses of fusion burning processes in magnetically confined plasmas, that include the thermonuclear instability, have been carried out by 1+˝ D transport codes [3] and, consequently, the onset of tri-dimensional structures has not been investigated. Then new analyses, drastically different from those performed as a first approach to the problem and expanding on the (analytical) theory reported in the present paper, will have to be developed. *Sponsored in part by the U.S. DoE.
[1] COPPI B., Presentation at the Sherwood Theory Meeting, San Diego, CA, April 2014.
[2] COPPI B., et al., Paper FIP/P8-27. Presented at the 25th IAEA Fusion Energy Conference, St. Petersburg, Russia, October 2014. Submitted to Nucl. Fus.
[3] AIROLDI, A., CENACCHI G., Nucl. Fus. 37, (1997) 1117.

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