| PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
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Measurement of molybdenum ion density for L-mode and H-mode plasma discharges in the EAST tokamak |
| Yongcai Shen(沈永才)1,2, Hongming Zhang(张洪明)1, Bo Lyu(吕波)1, Yingying Li(李颖颖)1, Jia Fu(符佳)1, Fudi Wang(王福地)1, Qing Zang(臧庆)1, Baonian Wan(万宝年)1, Pan Pan(潘盼)2, Minyou Ye(叶民友)3 |
1 Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China;
2 School of Mathematics and Physics, Anqing Normal University, Anqing 246011, China;
3 Department of Engineering and Applied Physics, University of Science and Technology of China, Hefei 230026, China |
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Abstract We report the measurement of total molybdenum ion density for L-mode and H-mode plasmas on EAST using spectral lines observation and calculation based on an impurity transport code. A flat-filed extreme ultraviolet spectrometer with some spatial resolution is used to obtain the radial profiles of molybdenum spectral line emissions. The absolute calibration for the extreme ultraviolet spectrometer is finished by comparing the calculated bremsstrahlung intensity with the readings of CCD detector. Molybdenum ion transport study is performed using the radial ion density profiles and one-dimensional impurity transport code STRAHL. The total molybdenum density profiles are determined from the transport analysis. The molybdenum density during L-mode and H-mode phases are obtained, which are about 3 and 4 orders of magnitude smaller than the electron density, respectively. An inward pinch is found during the H-mode phase that leads to the peaked profile of molybdenum density.
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Received: 06 January 2020
Revised: 29 February 2020
Accepted manuscript online:
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PACS:
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52.70.Kz
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(Optical (ultraviolet, visible, infrared) measurements)
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52.25.Vy
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(Impurities in plasmas)
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32.30.Rj
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(X-ray spectra)
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| Fund: Project supported by the National Key Research and Development Program of China (Grant No. 2017YFE031300), the Key Program of Research and Development of Hefei Science Center of China (Grant No. 2017HSC-KPRD002), the National Natural Science Foundation of China (Grant No. 11805231), the Natural Science Foundation of Anhui Province of China (Grant Nos. 1908085J01, 1808085QA14, and 1908085QF274), the ASIPP Science and Research Fund of China (Grant No. DSJJ-17-03), Collaborative Innovation Program of Hefei Science Center, CAS (Grant No. 2019HSC-CIP005), and Anqing Normal University Research Project, China (Grant Nos. 043-180079 and 044-140001000024). |
Corresponding Authors:
Bo Lyu
E-mail: blu@ipp.ac.cn
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Cite this article:
Yongcai Shen(沈永才), Hongming Zhang(张洪明), Bo Lyu(吕波), Yingying Li(李颖颖), Jia Fu(符佳), Fudi Wang(王福地), Qing Zang(臧庆), Baonian Wan(万宝年), Pan Pan(潘盼), Minyou Ye(叶民友) Measurement of molybdenum ion density for L-mode and H-mode plasma discharges in the EAST tokamak 2020 Chin. Phys. B 29 065206
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