Line identification of extreme ultraviolet spectra from aluminum ions in EAST Tokamak plasmas

Author:

Zhang Fengling,Zhang Ling,Zhang Wenming,Cheng YunxinORCID,Hu Ailan,Ding XiaobinORCID,Morita Shigeru,Li Zhengwei,Zhou Zhen,Cao Yiming,Ma Jiuyang,Xu Zhehao,Xu Lang,Zhou Chengxi,Jie Yinxian,Mitnik DaríoORCID

Abstract

Abstract Extreme ultraviolet (EUV) spectra emitted from aluminum in the 5-340 Å wavelength range were observed in Experimental Advanced Superconducting Tokamak (EAST) discharges. Several spectral lines from aluminum ions with different degrees of ionization were successfully observed with sufficient spectral intensities and resolutions using three fast-time-response EUV spectrometers. The line identification uses three independent state-of-art computational codes for the atomic structure calculations, which provide the wavelengths and the collisional and radiative transition rate coefficients. These programs are hullac (Hebrew University—Lawrence Livermore Atomic Code), autostructure, and fac (Flexible Atomic Code). Using three different codes allows us to resolve some ambiguities in identifying certain spectral lines and assess the validity of the theoretical predictions.

Funder

National Magnetic Confinement Fusion Energy R & D Program

Chinese Academy of Sciences President’s International Fellowship Initiative

Consejo Nacional de Investigaciones Científicas y Técnicas, Argentina

National Natural Science Foundation of China

Alliance of International Science Organizations

Agencia Nacional de Promoción Científica y Tecnológica, Argentina

Publisher

IOP Publishing

Subject

Condensed Matter Physics,Mathematical Physics,Atomic and Molecular Physics, and Optics

Reference40 articles.

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