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Controllability Study of Propagating Mode Content by an Angle-Adjustable Mirror of a Miter-Bend in EC H&CD Transmission Line

Journal Article · · IEEE Transactions on Plasma Science
 [1];  [2];  [3];  [4];  [2];  [2];  [2];  [2];  [5];  [6];
  1. Naka Fusion Inst., National Institute of Quantum and Radiological Science and Technology, Naka (Japan); MIT
  2. Naka Fusion Inst., National Institute of Quantum and Radiological Science and Technology, Naka (Japan)
  3. Univ. of Fukui, Fukui (Japan)
  4. Osaka Univ., Suita (Japan)
  5. Japan Atomic Energy Agency (JAEA), Naka (Japan); Rokkasho Fusion Research Inst., National Inst. of Quantum and Radiological Science and Technology, Rokkasho, Aomori (Japan)
  6. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center
A miter-bend-type mode converter, which has an angle-adjustable mirror, is proposed to control the transmission mode content in the electron cyclotron heating and current drive transmission line. This component excites the higher order mode by injecting a tilted radio frequency beam into a waveguide using the angle-adjustable mirror. A mock-up model of the converter was developed to evaluate the principle of the mode conversion.The experimental result of the mock-up representing the ratio of LP01 mode and LP11 mode was successfully controlled by 10% as the theoretical prediction.
Research Organization:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)
Grant/Contract Number:
FC02-93ER54186
OSTI ID:
1593938
Journal Information:
IEEE Transactions on Plasma Science, Journal Name: IEEE Transactions on Plasma Science Journal Issue: 12 Vol. 44; ISSN 0093-3813
Publisher:
IEEECopyright Statement
Country of Publication:
United States
Language:
English

References (14)

Measurement of RF Transmission Mode in ITER Relevant EC H&CD Transmission Line journal June 2010
3D wavebeam field reconstruction from intensity measurements in a few cross sections journal April 1995
ECH MW-level CW transmission line components suitable for ITER journal November 2005
Design of a high power millimeter wave launcher for EC H&CD system on ITER journal January 2009
Far Field Calculations and Measurements of an S-Bend Deformed Oversized HE11-Waveguide Antenna journal January 1999
High power millimeter wave experiment of ITER relevant electron cyclotron heating and current drive system journal June 2011
Experimental Verification of Phase Retrieval of Quasi-Optical Millimeter-Wave Beams journal November 2006
Linearly Polarized Modes of a Corrugated Metallic Waveguide journal November 2010
Simple Correctors for Elimination of High-Order Modes in Corrugated Waveguide Transmission Lines journal January 2014
Progress on the iter Upper Launcher Millimeter wave Design and Testing conference April 2009
The EC H&CD Transmission Line for ITER journal May 2011
Progress on Design and Development of ITER Equatorial Launcher: Analytical Investigation and R&D of the Launcher Components for the Design Improvement journal August 2007
Design of Circular Corrugated Waveguides to Transmit Millimeter Waves at ITER journal January 2008
Loss Estimate for ITER ECH Transmission Line Including Multimode Propagation journal April 2010

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