Faraday shield effects on a half-turn loop antenna used for ICRF plasma heating

Journal Article · Sat Oct 01 04:00:00 EDT 1988 · IEEE Trans. Plasma Sci.; (United States)

OSTI ID:6488772

Sawaya, K; Adachi, S ^[1]; Sato, Y ^[2]

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1. Dept. of Electrical Engineering, Tohoku Univ., Sendai 980 (JP)
2. National Space Development Agency of Japan, Tsukuba, 305 (JP)

Characteristics of a half-turn loop antenna having a Faraday shield have been systematically investigated. The main interest is to clarify the Faraday shield effects on the near-zone electric field distribution. For analytical simplicity, a loop antenna located on an infinite conducting plane and radiating into semi-infinite vacuum space has been analyzed by using the moment method. Some important results have been obtained: In the presence of the Faraday shield, undesirable field components have been confirmed to be sufficiently suppressed and the heating component E/sub y/, which otherwise is strongly localized as an end effect, has been found to be distributed uniformly along the antenna in the case of a short electric length. It is found that the shielding strips should be uniformly distributed over the entire region around the half-turn loop antenna. An experimental investigation is also performed to confirm the validity of the analysis.

• OSTI ID: 6488772
• Journal Information: IEEE Trans. Plasma Sci.; (United States), Journal Name: IEEE Trans. Plasma Sci.; (United States) Vol. 16:5; ISSN ITPSB
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700101* -- Fusion Energy-- Plasma Research-- Confinement
Heating
& Production
700102 -- Fusion Energy-- Plasma Research-- Diagnostics
ANTENNAS
DATA
ELECTRICAL EQUIPMENT
EQUIPMENT
EXPERIMENTAL DATA
FARADAY EFFECT
HEATING
HIGH-FREQUENCY HEATING
ICR HEATING
INFORMATION
NUMERICAL DATA
PLASMA HEATING
SHIELDING