Pressure-driven reconnection and quasi periodical oscillations in plasmas

Journal Article · Sat Mar 15 00:00:00 EDT 2014 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4868728· OSTI ID:22251885

Paccagnella, R., E-mail: [e-mail] ^[1]

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1. Consorzio RFX and Istituto Gas Ionizzati del Consiglio Nazionale delle Ricerche (CNR), Padova (Italy)

This paper presents a model for an ohmically heated plasma in which a feedback exists between thermal conduction and transport, on one side, and the magneto-hydro-dynamical stability of the system, on the other side. In presence of a reconnection threshold for the magnetic field, a variety of periodical or quasi periodical oscillations for the physical quantities describing the system are evidenced. The model is employed to interpret the observed quasi periodical oscillations of electron temperature and perturbed magnetic field around the so called “Single Helical” state in the reversed field pinch, but its relevance for other periodical phenomena observed in magnetic confinement systems, especially in tokamaks, is suggested.

• OSTI ID: 22251885
• Journal Information: Physics of Plasmas, Vol. 21, Issue 3; Other Information: (c) 2014 Euratom; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ELECTRON TEMPERATURE
FEEDBACK
MAGNETIC CONFINEMENT
MAGNETIC FIELDS
OSCILLATIONS
PERIODICITY
PLASMA
REVERSED-FIELD PINCH DEVICES
REVERSE-FIELD PINCH
STABILITY
THERMAL CONDUCTION
TOKAMAK DEVICES