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Title: Electrical testing of the full-scale model of the NSTX HHFW antenna array

Abstract

The 30 MHz high harmonic fast wave (HHFW) antenna array for NSTX consists of 12 current straps, evenly spaced in the toroidal direction. Each pair of straps is connected as a half-wave resonant loop and will be driven by one transmitter, allowing rapid phase shift between transmitters. A decoupling network using shunt stub tuners has been designed to compensate for the mutual inductive coupling between adjacent current straps, effectively isolating the six transmitters from one another. One half of the array, consisting of six full-scale current strap modules, three shunt stub decouplers, and powered by three phase-adjustable rf amplifiers had been built for electrical testing at ORNL. Low power testing includes electrical characterization of the straps, operation and performance of the decoupler system, and mapping of the rf fields in three dimensions. (c) 1999 American Institute of Physics.

Authors:
 [1];  [1];  [1];  [1];  [1]
  1. Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-8071 (United States)
Publication Date:
OSTI Identifier:
20216720
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 485; Journal Issue: 1; Other Information: PBD: 20 Sep 1999; Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; HIGH-FREQUENCY HEATING; ANTENNAS; RF SYSTEMS; REFLECTIVITY; MAGNETIC FIELDS; CONTROL SYSTEMS

Citation Formats

Ryan, P. M., Swain, D. W., Wilgen, J. B., Fadnek, A., and Sparks, D. O. Electrical testing of the full-scale model of the NSTX HHFW antenna array. United States: N. p., 1999. Web. doi:10.1063/1.59758.
Ryan, P. M., Swain, D. W., Wilgen, J. B., Fadnek, A., & Sparks, D. O. Electrical testing of the full-scale model of the NSTX HHFW antenna array. United States. doi:10.1063/1.59758.
Ryan, P. M., Swain, D. W., Wilgen, J. B., Fadnek, A., and Sparks, D. O. Mon . "Electrical testing of the full-scale model of the NSTX HHFW antenna array". United States. doi:10.1063/1.59758.
@article{osti_20216720,
title = {Electrical testing of the full-scale model of the NSTX HHFW antenna array},
author = {Ryan, P. M. and Swain, D. W. and Wilgen, J. B. and Fadnek, A. and Sparks, D. O.},
abstractNote = {The 30 MHz high harmonic fast wave (HHFW) antenna array for NSTX consists of 12 current straps, evenly spaced in the toroidal direction. Each pair of straps is connected as a half-wave resonant loop and will be driven by one transmitter, allowing rapid phase shift between transmitters. A decoupling network using shunt stub tuners has been designed to compensate for the mutual inductive coupling between adjacent current straps, effectively isolating the six transmitters from one another. One half of the array, consisting of six full-scale current strap modules, three shunt stub decouplers, and powered by three phase-adjustable rf amplifiers had been built for electrical testing at ORNL. Low power testing includes electrical characterization of the straps, operation and performance of the decoupler system, and mapping of the rf fields in three dimensions. (c) 1999 American Institute of Physics.},
doi = {10.1063/1.59758},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 485,
place = {United States},
year = {1999},
month = {9}
}