A Feasibility Study on a Load Resilient Antenna for the KSTAR ICRF Heating System

Journal Article · Fri Sep 28 00:00:00 EDT 2007 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2800471· OSTI ID:21032753

Kwak, Jong-Gu; Kim, Suk-Kwon; Hwang, C K; Bae, Y D; Yoon, J S; Wang, S J; Kim, S K ^[1]; Cho, Suwon ^[2]

---

1. Korea Atomic Energy Research Institute, 150 Dukjin-Dong, Yusong, Daejon 305-353 (Korea, Republic of)
2. Kyonggi University, Suwon (Korea, Republic of)

An effective rf power coupling for ELMy plasmas is one of the key issues for the ICRF heating. The conjugate T matching, which was adopted by the ITER design, is known to be an effective solution for this problem. The KSTAR ICRF antenna consists of 4 current straps with the transmission line configurations of resonant loops. The conjugate T matching concept is applied to each strap by conjugating the impedance of the upper and the lower parts of the resonant loops at the T point and the electrical lengths of the upper and the lower parts are adjusted by using the two phase shifters. In this work, the feasibility of a conjugate T matching is studied for the KSTAR ICRF antenna. With a mutual coupling of 20% between the upper and the lower current straps, the KSTAR antenna is investigated for its load resilient characteristics against a variation of the plasma loading resistance. In addition, the effects of a phase difference of the antenna current between the upper and the lower straps on a rf power coupling to plasmas are investigated by using a full wave simulation code.

• OSTI ID: 21032753
• Journal Information: AIP Conference Proceedings, Vol. 933, Issue 1; Conference: 17. topical conference on radio frequency power in plasmas, Clearwater, FL (United States), 7-9 May 2007; Other Information: DOI: 10.1063/1.2800471; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ANTENNAS
COUPLING
DESIGN
EDGE LOCALIZED MODES
ELECTRIC CURRENTS
FEASIBILITY STUDIES
HEATING SYSTEMS
ICR HEATING
IMPEDANCE
ION CYCLOTRON-RESONANCE
ITER TOKAMAK
LOADING
MATHEMATICAL SOLUTIONS
PHASE SHIFT
PLASMA
PLASMA SIMULATION
POWER TRANSMISSION LINES
RF SYSTEMS
TESTING
VARIATIONS