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Open AccessArticle

1-D Modeling of the Screw-Pinch Plasma in PROTO-SPHERA

ENEA, Fusion and Nuclear Safety Department, C. R. Frascati, Via E. Fermi 45, 00044 Frascati (Roma), Italy
Consorzio CREATE, Università di Napoli Federico II, Via Claudio 21, 80125 Napoli, Italy
Department of Physics, University La Sapienza of Rome, 00185 Roma, Italy
Author to whom correspondence should be addressed.
Fluids 2019, 4(1), 42;
Received: 25 January 2019 / Revised: 22 February 2019 / Accepted: 4 March 2019 / Published: 7 March 2019
(This article belongs to the Special Issue Modelling of Plasma Flow)
PDF [1184 KB, uploaded 7 March 2019]


A simple steady-state model for a 3-species mixture (ions, electrons, and neutrals) in a screw-pinch plasma configuration is developed. The model is applied to the central plasma column of the PROTO-SPHERA experiment. Degree of ionization, azimuthal current density, and azimuthal ion velocity are calculated. Full ionization is found at plasma temperatures above 1.5 eV, with neutrals confined in an outer shell where radial plasma flow develops and drives both azimuthal current and azimuthal flow. View Full-Text
Keywords: PROTO-SPHERA; plasma confinement; plasma diffusion; plasma spontaneous rotation PROTO-SPHERA; plasma confinement; plasma diffusion; plasma spontaneous rotation

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Buratti, P.; Tirozzi, B.; Alladio, F.; Micozzi, P. 1-D Modeling of the Screw-Pinch Plasma in PROTO-SPHERA. Fluids 2019, 4, 42.

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