Determination of ICRF antenna fields in the vicinity of a 3-D Faraday shield structure

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Description

A three-dimensional (3-D) magnetostatic analysis developed at Oak Ridge National Laboratory has been used to calculate the electromagnetic transmission properties of representative Faraday shield designs. The analysis uses the long-wavelength approximation to obtain a 3-D Laplace solution for the magnetic scalar potential over one poloidal period of the Faraday shield, from which the complete magnetic field distribution may be obtained. Once the magnetic field distributions in the presence and absence of a Faraday shield are known, the flux transmission coefficient can be found, as well as any change in the distributed inductance of the current strap. The disturbed capacitance of ... continued below

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Pages: (29 p)

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Ryan, P.M.; Rothe, K.E.; Whealton, J.H. & Shepard, T.D. January 1, 1989.

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Description

A three-dimensional (3-D) magnetostatic analysis developed at Oak Ridge National Laboratory has been used to calculate the electromagnetic transmission properties of representative Faraday shield designs. The analysis uses the long-wavelength approximation to obtain a 3-D Laplace solution for the magnetic scalar potential over one poloidal period of the Faraday shield, from which the complete magnetic field distribution may be obtained. Once the magnetic field distributions in the presence and absence of a Faraday shield are known, the flux transmission coefficient can be found, as well as any change in the distributed inductance of the current strap. The disturbed capacitance of the strap can be found from an analogous 3-D electrostatic calculation, enabling the phase velocity of the slow-wave structure to be determined. Power dissipation in the shield may be estimated by equating the surface current on a perfect conductor with the surface magnetic field and using the surface current in conjunction with the finite conductivities of the shield materials to obtain the power distribution to eddy current heating. 4 refs., 5 figs., 1 tab.

Physical Description

Pages: (29 p)

Notes

NTIS, PC A03/MF A01; OSTI; INIS; GPO Dep.

Source

  • IAEA technical committee meeting on ICRH/edge physics, Munich (Germany, F.R.), 2-5 Oct 1989

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  • Other: DE90001354
  • Report No.: CONF-8910225-2
  • Grant Number: AC05-84OR21400
  • Office of Scientific & Technical Information Report Number: 5588370
  • Archival Resource Key: ark:/67531/metadc1087461

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • January 1, 1989

Added to The UNT Digital Library

  • Feb. 10, 2018, 10:06 p.m.

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  • April 25, 2018, 12:31 p.m.

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Ryan, P.M.; Rothe, K.E.; Whealton, J.H. & Shepard, T.D. Determination of ICRF antenna fields in the vicinity of a 3-D Faraday shield structure, article, January 1, 1989; Tennessee. (digital.library.unt.edu/ark:/67531/metadc1087461/: accessed May 28, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.