An improved method to measure the antenna resistance and radiated power of ICRF-antennas using current probes

Faugel, H.; Bobkov, V.; Braun, F.; Franke, T.; Hartmann, D.; Kircher, Michael; Noterdaeme, Jean-Marie; Siegl, G.

doi:10.1016/j.fusengdes.2011.02.092

Cited by 4 publications

(2 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Where Z inp is the input resistance, G is the voltage reflection coefficient, and Z 0 is the characteristic resistance of transmission line. This resistance measurement method was first proposed in [12] and compared with the normally computed method [13] on the ASDEX Upgrade with the ICRF antenna code TOPICA [14]. In addition, this resistance measurement method was also used in the experiment on EAST [15].…”

Section: Experimental Setup and Coupling Resistance Measurementmentioning

confidence: 99%

Recent ICRF coupling experiments on EAST

Yang¹,

Zhang²,

Zhao³

et al. 2018

Plasma Sci. Technol.

View full text Add to dashboard Cite

Recent ion cyclotron resonance frequency (ICRF) coupling experiments for optimizing ICRF heating in high power discharge were performed on EAST. The coupling experiments were focus on antenna phasing and gas puffing, which were performed separately on two ports of the ion cyclotron resonance heating (ICRH) system of EAST. The antenna phasing was performed on the I-port antenna, which consists of four toroidally spaced radiating straps operating in multiple phasing cases; the coupling performance was better under low wave number  | | k (ranging from 4.5 to 6.5). By fuelling the plasma from gas injectors, placed as uniformly spaced array from top to bottom at each side limiter of the B-port antenna, which works in dipole phasing, the coupling resistance of the B-port antenna increased obviously. Furthermore, the coupling resistance of the I-port antenna was insensitive to a smaller rate of gas puffing but when the gas injection rate was more than a certain value (>10 21 s −1 ), a sharp increase in the coupling resistance of the I-port antenna occurred, which was mainly caused by the toroidal asymmetric boundary density arising from gas puffing. A more specific analysis is given in the paper.

show abstract

Section: Experimental Setup and Coupling Resistance Measurementmentioning

confidence: 99%

Recent ICRF coupling experiments on EAST

Yang¹,

Zhang²,

Zhao³

et al. 2018

Plasma Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…The main methods for measuring coupling resistance in high reflection are a voltage/current probe pair and multivoltage probe arrays [6,7]. As the voltage/current probe pair has been applied and studied in many EAST-like systems recently, its performance has obviously been improved [8,9].…”

Section: Introductionmentioning

confidence: 99%

Design of a multi-voltage probe system for ICRF antenna coupling resistance measurement on EAST

Peng¹,

Chen²,

Wang³

et al. 2020

Plasma Sci. Technol.

View full text Add to dashboard Cite

A multi-voltage probe array system is designed to measure the coupling resistance of an ion cyclotron resonance frequency antenna. In the process of the antenna coupling resistance data extraction, the minimization algorithm, the original Levenberg-Marquardt algorithm, is replaced by the Broyden-Fletcher-Goldfarb-Shanno algorithm to achieve more stable and accurate results. Moreover, a simple model of the multi-voltage probe array was applied to simulate the performance of the Kalman filter, and to optimize the distance and position of the probes and probe number to mitigate the influence of the system noise on the rebuilt results. During the EAST experiment in 2019, a four-voltage probe array was applied to measure the coupling resistance of line 6 during high confined mode discharge. The measurement results by the multivoltage probe array system and the voltage/current probe pair show a good agreement.

show abstract