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Title: Pressure-driven reconnection and quasi periodical oscillations in plasmas

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.
Authors:
 [1]
  1. Consorzio RFX and Istituto Gas Ionizzati del Consiglio Nazionale delle Ricerche (CNR), Padova (Italy)
Publication Date:
OSTI Identifier:
22251885
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 21; Journal Issue: 3; Other Information: (c) 2014 Euratom; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
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