Detection of plasma equilibrium shifts with fiber optic sensing of image currents

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The radial equilibrium position of Reverse Field Pinch experiments is determined by the j x B force on the plasma. The current density is that of the toroidal plasma current and the B field is the vertical magnetic field which is present in the plasma. This magnetic field is the result of several components. The main field, generated by the toroidal current windings, is corrected by adjustable trim windings to achieve a desired equilibrium position. There is an additional component to the field due to induced image currents in the close fitting conducting shell which encircles the plasma. These currents ... continued below

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Pages: 16

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Forman, P.R.; Jahoda, F.C. & Miller, G. January 1, 1988.

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Description

The radial equilibrium position of Reverse Field Pinch experiments is determined by the j x B force on the plasma. The current density is that of the toroidal plasma current and the B field is the vertical magnetic field which is present in the plasma. This magnetic field is the result of several components. The main field, generated by the toroidal current windings, is corrected by adjustable trim windings to achieve a desired equilibrium position. There is an additional component to the field due to induced image currents in the close fitting conducting shell which encircles the plasma. These currents vary in time due to the finite L/R time of the conducting shell. It is the object of this paper to investigate the possibility of measuring these shell currents accurately using fiber optics so as to provide an analog signal to the equilibrium feedback circuit. 7 refs., 7 figs.

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Pages: 16

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  • 7. topical conference on high temperature plasma diagnostics, Napa, CA, USA, 13 Mar 1988

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  • Other: DE88007896
  • Report No.: LA-UR-88-811
  • Report No.: CONF-880364-15
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 5153700
  • Archival Resource Key: ark:/67531/metadc1056656

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Office of Scientific & Technical Information Technical Reports

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  • January 1, 1988

Added to The UNT Digital Library

  • Jan. 22, 2018, 7:23 a.m.

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  • Feb. 1, 2018, 7:03 p.m.

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Forman, P.R.; Jahoda, F.C. & Miller, G. Detection of plasma equilibrium shifts with fiber optic sensing of image currents, article, January 1, 1988; New Mexico. (digital.library.unt.edu/ark:/67531/metadc1056656/: accessed October 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.