Initial results from a folded waveguide ICRF antenna development project

Conference · Fri Aug 01 04:00:00 EDT 1997

OSTI ID:510440

Bigelow, T S; Cole, M J; Fadnek, A ^[1]

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1. and others

A folded waveguide (FWG) ICRF launcher has been built and preliminary high power tests completed. This project is intended to provide a proof-of-principle test, using a high density plasma load, of the high power density capability and other ITER-relevant advanced features of the FWG. The design is a 12 vane, 57 MHz unit with a quarter-wavelength resonator configuration. This FWG has a 0.31 m square cross section that can be installed with either fast wave or ion-Bernstein wave polarization and can also be retracted behind a vacuum isolation valve. A primary issue to be addressed by this project is the plasma loading and maximum power capability of the FWG. Initial high power tests on the ORNL Radio Frequency Test Facility have been conducted. Modeling of the FWG electromagnetic fields and calculations of loading have been performed as well as an investigation of alternate face plate designs that improve the coupling by allowing greater magnetic field penetration into the plasma. This FWG was originally designed for TFTR or PBX-M and is now being considered for the DIII-D tokamak at GA, the NSTX small aspect ratio device under construction at PPPL and the possible FSX experiment at PPPL.

• Research Organization: Oak Ridge National Lab., TN (United States)
• Sponsoring Organization: USDOE Office of Energy Research, Washington, DC (United States)
• DOE Contract Number: AC05-96OR22464
• OSTI ID: 510440
• Report Number(s): CONF-9704102--16; ON: DE97007769
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ANTENNAS
DESIGN
ELECTROMAGNETIC FIELDS
ICR HEATING
PERFORMANCE TESTING
TOKAMAK DEVICES
WAVEGUIDES