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

Ryan, P. M.; Rothe, K. E.; Whealton, J. H.; Shepard, T. D.

doi:10.1016/0920-3796(90)90062-b

Cited by 4 publications

(2 citation statements)

References 5 publications

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“…Electromagnetic codes have been developed to calculate the transmission properties of the Faraday shield designs and to determine the ICRF antenna fields in the vicinity of a 3D Faraday shield structure (e.g. [10][11][12][13]). One of the most active topics of research in this area in past years has been the examination of the role and necessity of the Faraday shield [14], which had been found to be an important element of the wave launching structure.…”

Section: Rf-sheath Rectification: Experiments and Modelling For Tore ...mentioning

confidence: 99%

Physics and technology in the ion-cyclotron range of frequency on Tore Supra and TITAN test facility: implication for ITER

Litaudon¹,

Bernard²,

Colas³

et al. 2013

Nucl. Fusion

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To support the design of ITER ion-cyclotron range of frequency heating system and to mitigate risks of operation in ITER, CEA has initiated an ambitious Research & Development program accompanied by experiments on Tore Supra or test bed facility together with a significant modeling effort. The paper summarizes the recent results in the following area:• Comprehensive characterization of a new Faraday screen concept tested on Tore Supra antenna. RF sheath rectification is now better understood: a new model has been developed and applied to ITER. • Full wave modeling of ITER ICRH heating and current drive scenarios with EVE code. With 20MW of power, a current of ±400kA could be driven on axis in the DT scenario. • First operation of CW test bed facility, TITAN, designed for ITER ICRH components testing and could host up to a quarter of an ITER antenna. • R&D of high permittivity materials to improve load of test facilities to mimic ITER plasma conditions.

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Section: Rf-sheath Rectification: Experiments and Modelling For Tore ...mentioning

confidence: 99%

Physics and technology in the ion-cyclotron range of frequency on Tore Supra and TITAN test facility: implication for ITER

Litaudon¹,

Bernard²,

Colas³

et al. 2013

Nucl. Fusion

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“…In this work, we discuss the RF heating phenomenon of the ICRF antenna. The RF heating profile on the ICRF antenna is one of the critical issues to determine the performance of the antenna for long-pulse operation and has already been well studied by several authors [9][10][11][12][13]. An accurate understanding of the profile is needed to prevent a hardware failure.…”

Section: Introductionmentioning

confidence: 99%

RF Power Dissipation on the KSTAR ICRF Antenna

Bae¹,

Kwak²,

Wang³

et al. 2007

JKPS

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The KSTAR (Korea Superconducting Tokamak Advanced Research) ICRF (ion cyclotron range of frequency) antenna system has Faraday shield tubes to protect it from direct exposure to the plasma environment. The RF heating profiles on the Faraday shield and on the current strap of the KSTAR ICRF antenna were theoretically studied and compared with experimental results. The poloidal configuration of the magnetic field was calculated by using a commercial 2-D FEM (finite element method) code, from which the heat load profile along the circumference of the Faraday shield surface was deduced. The heat loads on the top and the bottom surfaces facing the adjacent Faraday shield were found to be relatively high. The toroidal configuration of the magnetic field was calculated, and the toroidal profiles of the heat loads on the Faraday shield and the strap were deduced. The heat load has a maximum value at the joining position of the Faraday shield with the cavity wall. The heat loads on both the rounded edges of the current strap were found to be relatively high. For a strap current of 677 A (peak), which corresponds to a maximum voltage of 30.0 kVp, the maximum heat loads on the Faraday shield and on the current strap were 381 and 57 kW/m 2 , respectively, at a frequency of 30 MHz. A RF test was performed to investigate the standoff capability of the antenna without any cooling. In that test, we measured the temperature profiles on the Faraday shield and on the current strap by using an IR camera and then compared the results with the calculated heat loads. The maximum temperature of the Faraday shield was 374 • C for a maximum voltage of 30.0 kVp and a pulse length of 66 s. The temperature profiles agreed well with the calculated heat load profiles.

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Methods of calculating selected geometrical effects in the design of ICRH antennas

Ryan¹,

Baity²,

Goulding³

et al. 1994

Fusion Engineering and Design

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

Cited by 4 publications

References 5 publications

Physics and technology in the ion-cyclotron range of frequency on Tore Supra and TITAN test facility: implication for ITER

Physics and technology in the ion-cyclotron range of frequency on Tore Supra and TITAN test facility: implication for ITER

RF Power Dissipation on the KSTAR ICRF Antenna

Methods of calculating selected geometrical effects in the design of ICRH antennas

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