Open theoretical issues and their solutions for fusion relevant physical regimes. (11th August 2015)

• Record Type: Journal Article
• Authors: Coppi, B.; Basu, B.; Montag, P.; Sugiyama, L.; Buratti, P.
• Is Part Of: Nuclear fusion. Volume 55:Number 9(2015:Sep.)
• Publication Date: 2015-08-11
• Subjects: quasi-coherent mode -- magnetic reconnection -- spontaneous rotation; Nuclear fusion -- Periodicals; 621.48405
• DOI: 10.1088/0029-5515/55/9/093018
• Languages: English
• ISSNs: 0029-5515

Abstract

Abstract: The effort to identify the properties of fusion burning plasmas, involving issues of basic plasma physics and new revealing experimental observations, has led to the development of a theoretical basis for three relevant subjects: (i) novel features of the quasi-coherent mode (QCM) associated with the H-confinement regime, (ii) magnetic reconnection processes in low collisionality regimes and the theory of unpredicted macroscopic modes producing magnetic islands with a propagating velocity in the ion diamagnetic velocity direction, (iii) angular momentum transport described by a non-diffusive equation reproducing the spontaneous rotation velocity profiles; the plasma modes that are identified can produce an angular momentum transport contrary to that predicted by a diffusion process and involve significant electron temperature fluctuations.