The Effects of Magnetic Field Errors on Reversed Field Pinch Plasma PDF Download
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Author: Abdulgader Feturi Almagri
Publisher:
ISBN:
Category :
Languages : en
Pages : 260
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Author: Abdulgader Feturi Almagri
Publisher:
ISBN:
Category :
Languages : en
Pages : 260
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Author: Kenneth Lee Sidikman
Publisher:
ISBN:
Category :
Languages : en
Pages : 324
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Author: S. Yamada
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ISBN:
Category : Electromagnetic fields
Languages : en
Pages : 26
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Author:
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Category : Aeronautics
Languages : en
Pages : 1572
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Author: Thomas Claude Jernigan
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ISBN:
Category :
Languages : en
Pages : 374
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Author:
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ISBN:
Category :
Languages : en
Pages :
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In the reversed field pinch (RFP), magnetic field perturbations having zero poloidal mode number and any toroidal mode number are resonant at the field reversal surface. Such perturbations are a particular threat to the RFP because of their weak radial dependence at low toroidal mode number, and because the toroidal field ripple is essentially of this type. The widths of the resulting islands are calculated in this paper. The self-consistent plasma response is included through the assumption that the plasma relaxes to a Taylor force-free state. The connection with linear tearing mode theory is established for those limits where arbitrarily large islands result from infinitesimal perturbations. Toroidal effects are considered, and application of the theory to RFP experiments is discussed.
Author: Joseph Norwood
Publisher:
ISBN:
Category : Pinch effect (Physics)
Languages : en
Pages : 76
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The various instabilities which beset the theta-pinch plasma are described in some detail, and the importance of the role of magnetic-field uniformity is demonstrated. Sources of the field nonuniformity are delineated and discussed. These included the collector-plate geometry, the nonlinear effect of the plasma, and effects in the coil, discontinuity in gap spacing as the current flows into the coil, and effects of the alteration in axial current distribution due to skin effect.
Author: Emma Harris
Publisher:
ISBN:
Category : Fusion
Languages : en
Pages : 290
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RFX is a plasma physics experiment which aims to provide substantial progress in understanding the properties of the reversed field pinch (RFP) configuration in confining high b plasmas. With European funding, a large toroidal device was built in Padua, Northern Italy. Through a collaboration with Istituto Gas Ionizzati in Italy, University College Cork has responsibility for the implementation of a multichord polarimeter which will, for the first time, provide information on the internal magnetic field configuration in RFX. A single-chord polarimeter has been successfully implemented on RFX, as a pilot experiment, and work is currently underway for the completion of the six-chord diagnostic. This thesis describes the most recent work undertaken in preparation for the implementation of the six-chord polarimeter. A polarimetric diagnostic produces a measurement of the Faraday rotation angle which is proportional to the line integral of the product of the electron density and the local magnetic field profile along the line of the probing beam. Therefore, to obtain the poloidal magnetic field profile from the polarimetric measurement, an inversion process is needed to transform the integral values to the local values. This thesis presents an optimised method for reconstructing the poloidal magnetic field profile from a six-chord measurement of the Faraday rotation angle. The thesis outlines the various improvements which have been made to the previous inversion algorithm. The new algorithm has been tested for a variety of plasma conditions and the results are presented and discussed in the thesis. The effects of Faraday rotation measurement errors on the reconstruction capability of the magnetic field profile are also considered. Implementation of the new inversion algorithm will provide more accurate information on the magnetic configuration of RFX than would previously have been possible.
Author:
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ISBN:
Category : Power resources
Languages : en
Pages : 526
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Author:
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ISBN:
Category : Controlled fusion
Languages : en
Pages : 100
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