2026-10-12T08:58:12Z https://www.scidb.cn/oai

10.57760/sciencedb.04609 2022-12-05T17:30:56Z

2022-12-05 Measurement of tungsten impurity spectra with a two-crystal X-ray crystal spectrometer on EAST doi:10.57760/sciencedb.04609 en Spectral measurement of tungsten (W) impurity is essential to study impurity transport. Therefore, an X-ray crystal spectrometer (XCS) on EAST was used to measure the line spectra from highly ionized W ions. On EAST, both poloidal XCS and tangential XCS have been developed to measure the plasma temperature as well as the rotation velocity. Recently, He-like and H-like argon spectra have also been obtained using a two-crystal setup. W lines are identified in this study. Through a careful analysis, the W lines of 3.9336, 3.9321, and 3.664 Å are found to be diffracted by He-like or H-like crystals. The lines are confirmed with the NIST database. We also calculated the ion temperature with Doppler broadening of these lines. The ion temperature from the W lines is entirely consistent with that from Ar line spectra. The measurement of these W line spectra could be used to study W impurity transport in future work. tungsten spectra; X-ray spectrometer; two-crystal Hongming Zhang Liang He Bo Lyu Jun Chen PUBLIC https://creativecommons.org/licenses/by/4.0/ dataset http://www.doi.org/10.1088/2058-6272/ab84ee Science Data Bank