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Magnetic island suppression by electron cyclotron current drive as converse of a forced reconnection problem

Part of: Focus on Fusion PLA 17th European Fusion Theory Conference

Published online by Cambridge University Press:  14 June 2018

D. Grasso Open the ORCID record for D. Grasso [Opens in a new window] ,
D. Borgogno ,
L. Comisso Open the ORCID record for L. Comisso [Opens in a new window]  and
E. Lazzaro
D. Grasso*
Affiliation:
Istituto dei Sistemi Complessi - CNR and Dipartimento di Energia, Politecnico di Torino, Torino 10129, Italy
D. Borgogno
Affiliation:
Dipartimento di Energia, Politecnico di Torino, Torino 10129, Italy
L. Comisso
Affiliation:
Department of Astrophysical Sciences and Princeton Plasma Physics Laboratory, Princeton University, Princeton, NJ 08544, USA
E. Lazzaro
Affiliation:
Istituto Fisica del Plasma CNR, Via R. Cozzi 53, 20125 Milano, Italy
*
†Email address for correspondence: daniela.grasso@infm.polito.it
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Abstract

This paper addresses one aspect of the problem of the suppression of tearing mode magnetic islands by electron cyclotron current drive (ECCD) injection, formulating the problem as the converse of a forced reconnection problem. New physical conditions are discussed which should be considered in the technical approach towards a robust control strategy. Limits on the ECCD deposition are determined to avoid driving the system into regimes where secondary instabilities develop. Numerical simulations confirming the theory are also presented.

Keywords

plasma instabilitiesplasma nonlinear phenomenaplasma simulation
Type
Research Article
Information
Journal of Plasma Physics , Volume 84 , Issue 3 , June 2018 , 745840302
Copyright
© Cambridge University Press 2018 

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Footnotes

‡

Present address: Department of Astronomy and Columbia Astrophysics Laboratory, Columbia University, New York, NY 10027, USA.

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