RF wave propagation simulation for ICRF antenna in EAST

• Published in: Journal of nuclear science and technology Vol. 58; no. 7; pp. 837 - 844
• Main Authors: Li, Jiahao, Yang, Qingxi, Song, Yuntao, Yu, Chao, Chen, Shilin, Xu, Hao, Du, Dan
• Format: Journal Article
• Language: English
• Published: Tokyo Taylor & Francis 03.07.2021; Taylor & Francis Ltd
• Subjects: Antennas; Cold plasmas; Coupling; Cyclotron frequency; field polarization; Finite element method; ICRF; Ion cyclotron radiation; Mathematical analysis; Maxwell's equations; Polarization characteristics; Propagation; Radio frequency; Simulation; Tokamak devices; Wave propagation
• ISSN: 0022-3131; 1881-1248
• DOI: 10.1080/00223131.2021.1879689

The propagation performance of radiofrequency (RF) waves excited by ICRF antenna in plasma has a great influence on the coupling effect. In this paper, the propagation characteristics of fast wave (FW) and slow wave (SW) under tokamak experimental condition are calculated, and the influence of angular frequency w 0 , antenna power spectrum k // and tokamak total magnetic field B 0 is illustrated based on the typical operating parameters in EAST. By applying perfect matched layer (PML) boundary processing method to simulate single-pass absorption and using finite element method (FEM) to solve Maxwell equations in frequency domain, the propagation and coupling simulation of RF waves in cold plasma for EAST ICRF antenna in B-window were carried out to obtain the polarization characteristics of fields and the relationship between the coupling impedance and the gap length from antenna to the FW cut-off layer. The analysis results in this paper provide useful reference and guidance for the study of propagation coupling of ICRF waves in EAST and other magnetic confined fusion devices.