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

Abstract

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 distrbuted 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 this surface current in conjunction with the finite conductivities of the shield materials to obtain the power distribution due to eddy current heating. (orig.).
Authors:
Ryan, P M; Rothe, K E; Whealton, J H; Shepard, T D [1] 
  1. Oak Ridge National Lab., TN (USA)
Publication Date:
Apr 01, 1990
Product Type:
Conference
Report Number:
CONF-8910436-
Reference Number:
AIX-21-065607; EDB-90-128134
Resource Relation:
Journal Name: Fusion Engineering and Design; (Netherlands); Journal Volume: 12:1/2; Conference: 4. IAEA Technical Committee meeting in ion cyclotron resonance heating (ICRH)/edge physics, 4. IAEA Technical Committee Meeting on Ion Cyclotron Resonance Heating (ICRH)/ Edge Physics, Garching (Germany, F.R.), 2-5 Oct 1989
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ICR HEATING; ANTENNAS; FARADAY CUPS; CAPACITANCE; EDDY CURRENTS; ELECTRIC CONDUCTIVITY; MAGNETIC FIELDS; PHASE VELOCITY; POWER DISTRIBUTION; POWER TRANSMISSION; SHIELDS; THREE-DIMENSIONAL CALCULATIONS; BEAM MONITORS; CURRENTS; ELECTRIC CURRENTS; ELECTRICAL EQUIPMENT; ELECTRICAL PROPERTIES; EQUIPMENT; HEATING; HIGH-FREQUENCY HEATING; MEASURING INSTRUMENTS; MONITORS; PHYSICAL PROPERTIES; PLASMA HEATING; VELOCITY; 700101* - Fusion Energy- Plasma Research- Confinement, Heating, & Production; 700201 - Fusion Power Plant Technology- Blanket Engineering
OSTI ID:
6703325
Country of Origin:
Netherlands
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 0920-3796; CODEN: FEDEE; Other: CNN: DE-AC05-84OR21400
Submitting Site:
NLN
Size:
Pages: 37-42
Announcement Date:

Citation Formats

Ryan, P M, Rothe, K E, Whealton, J H, and Shepard, T D. Determination of ICRF antenna fields in the vicinity of a 3-D Faraday shield structure. Netherlands: N. p., 1990. Web.
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. Netherlands.
Ryan, P M, Rothe, K E, Whealton, J H, and Shepard, T D. 1990. "Determination of ICRF antenna fields in the vicinity of a 3-D Faraday shield structure." Netherlands.
@misc{etde_6703325,
title = {Determination of ICRF antenna fields in the vicinity of a 3-D Faraday shield structure}
author = {Ryan, P M, Rothe, K E, Whealton, J H, and Shepard, T D}
abstractNote = {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 distrbuted 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 this surface current in conjunction with the finite conductivities of the shield materials to obtain the power distribution due to eddy current heating. (orig.).}
journal = {Fusion Engineering and Design; (Netherlands)}
volume = {12:1/2}
place = {Netherlands}
year = {1990}
month = {Apr}
}