Influence of impurity seeding on the plasma radiation in the EAST tokamak

Liping DONG (董丽平); Yanmin DUAN (段艳敏); Kaiyun CHEN (陈开云); Xiuda YANG (杨秀达); Ling ZHANG (张凌); Feng XU (徐峰); Jingbo CHEN (陈竞博); Songtao MAO (毛松涛); Zhenwei WU (吴振伟); Liqun HU (胡立群)

doi:10.1088/2058-6272/aab20c

Plasma Science and Technology > 2018 > 20(6): 65102-065102. > DOI: 10.1088/2058-6272/aab20c

Liping DONG (董丽平), Yanmin DUAN (段艳敏), Kaiyun CHEN (陈开云), Xiuda YANG (杨秀达), Ling ZHANG (张凌), Feng XU (徐峰), Jingbo CHEN (陈竞博), Songtao MAO (毛松涛), Zhenwei WU (吴振伟), Liqun HU (胡立群). Influence of impurity seeding on the plasma radiation in the EAST tokamak[J]. Plasma Science and Technology, 2018, 20(6): 65102-065102. DOI: 10.1088/2058-6272/aab20c

Citation:

PDF (1072 KB)

Influence of impurity seeding on the plasma radiation in the EAST tokamak

¹ Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, People’s Republic of China
² University of Science and Technology of China, Hefei 230026, People’s Republic of China

Funds: This work was supported by National Natural Science Foundation of China (Grant Nos. 11575247, 11605243, 11575244), National Magnetic Confinement Fusion Science Program of China (Grant No. 2014GB124006).

More Information

Received Date: October 08, 2017

Graphical Abstract

Abstract

Abstract

Plasma radiation characteristics in EAST argon (Ar) gas and neon (Ne) gas seeding experiments are studied. The radiation profiles reconstructed from the fast bolometer measurement data by tomography method are compared with the ones got from the simulation program based on corona model. And the simulation results coincide roughly with the experimental data. For Ar seeding discharges, the substantial enhanced radiations can be generally observed in the edge areas at normalized radius ρ_pol～0.7–0.9, while the enhanced regions are more outer for Ne seeding discharges. The influence of seeded Ar gas on the core radiation is related to the injected position. In discharges with LSN divertor configuration, the Ar ions can permeate into the core region more easily when being injected from the opposite upper divertor ports. In USN divertor configuration, the W impurity sputtered from the upper divertor target plates are observed to be an important contributor to the increase of the core radiation no matter impurity seeding from any ports. The maximum radiated power fractions frad (P_rad/P_heat) about 60%–70% have been achieved in the recent EAST experimental campaign in 2015–2016.
- impurity seeding,
- radiation profile,
- AXUV photodiodes,
- impurity sputtering

FullText(HTML)

References (26)

References

[1]	Mukai K et al 2015 Nucl. Fusion 55 083016
[2]	Maddison G P et al 2003 Nucl. Fusion 43 49
[3]	Kallenbach A et al 2010 Plasma Phys. Control. Fusion 52 055002
[4]	Kallenbach A et al 2013 Plasma Phys. Control. Fusion 55 124041
[5]	Asakura N et al 2009 Nucl. Fusion 49 115010
[6]	Beurskens M N A et al 2016 Nucl. Fusion 56 056014
[7]	Beurskens M N A et al 2013 Plasma Phys. Control. Fusion 55 124043
[8]	Goetz J A et al 1999 Phys. Plasmas 6 1899
[9]	Matthews G F et al 1999 Nucl. Fusion 39 19
[10]	Irena Ivanova-Stanik et al 2017 Nukleonika 62 3
[11]	Wan B N et al 2009 Nucl. Fusion 49 104011
[12]	Guo H Y et al 2014 Nucl. Fusion 54 013002
[13]	Wang D S et al 2013 Plasma Sci. Technol. 15 614
[14]	Wang D S et al 2011 Phys. Plasmas 18 032505
[15]	Wang W Z et al 2016 Nucl. Fusion Plasma Phys. 36 42
[16]	Duan Y M et al 2013 J. Nucl. Mater. 438 S338
[17]	Faust I et al 2014 Rev. Sci. Instrum. 85 11D856
[18]	Xu Z et al 2016 Rev. Sci. Instrum. 87 11D429
[19]	Mao H M et al 2017 Rev. Sci. Instrum. 88 043502
[20]	Zhang L et al 2015 Rev. Sci. Instrum. 86 123509
[21]	Konoshima S et al 2001 Plasma Phys. Control. Fusion 43 959
[22]	Ingesson L C et al 2008 Fusion Sci. Technol. 53 528
[23]	Asakura N et al 2011 J. Nucl. Mater. 415 S318
[24]	Tarter C B et al 1977 At. Data Nucl. Data Tables 20 397
[25]	Eckstein W 1993 Sputtering Data IPP 9/82 Garching
[26]	Bohdansky J 1980 J. Nucl. Mater. 93–94 44

[1]	Xinshuai YANG (杨新帅), Ruiji HU (胡睿佶), Jun CHEN (陈俊), Fudi WANG (王福地), Jia FU (符佳), Yingying LI (李颖颖), Hongming ZHANG (张洪明), Yongcai SHEN (沈永才), Xianghui YIN (尹相辉), Bo LYU (吕波), EAST team. Measurement of impurity lines with two- crystal x-ray spectrometers on EAST[J]. Plasma Science and Technology, 2018, 20(12): 124001. DOI: 10.1088/2058-6272/aad177
[2]	Dianlin ZHENG (郑典麟), Kai ZHANG (张凯), Zhengying CUI (崔正英), Ping SUN (孙平), Chunfeng DONG (董春凤), Ping LU (卢平), Bingzhong FU (傅炳忠), Zetian LIU (刘泽田), Zhongbing SHI (石中兵), Qingwei YANG (杨青巍). High-speed VUV spectroscopy for edge impurity line emission measurements in HL-2A tokamak[J]. Plasma Science and Technology, 2018, 20(10): 105103. DOI: 10.1088/2058-6272/aacf3d
[3]	Heng LAN (兰恒), Guosheng XU (徐国盛), Kevin TRITZ, Ning YAN (颜宁), Tonghui SHI (石同辉), Yongliang LI (李永亮), Tengfei WANG (王腾飞), Liang WANG (王亮), Jingbo CHEN (陈竞博), Yanmin DUAN (段艳敏), Yi YUAN (原毅), Youwen SUN (孙有文), Shuai GU (顾帅), Qing ZANG (臧庆), Ran CHEN (陈冉), Liang CHEN (陈良), Xingwei ZHENG (郑星炜), Shuliang CHEN (陈树亮), HuanLIU (刘欢), YangYE (叶扬), Huiqian WANG (汪惠乾), Baonian WAN (万宝年), the EAST Team. Analysis of electron temperature, impurity transport and MHD activity with multi-energy soft x-ray diagnostic in EAST tokamak[J]. Plasma Science and Technology, 2017, 19(12): 125101. DOI: 10.1088/2058-6272/aa8cbf
[4]	WANG Fuqiong(王福琼), CHEN Yiping(陈一平), HU Liqun(胡立群). DIVIMP Modeling of Impurity Transport in EAST[J]. Plasma Science and Technology, 2014, 16(7): 642-649. DOI: 10.1088/1009-0630/16/7/03
[5]	ZHOU Hangyu(周航宇), CUI Zhengying(崔正英), MORITA Shigeru(森田繁), FU Bingzhong(傅炳忠), GOTO Motoshi(後藤基志), SUN Ping(孙平), FENG Beibin(冯北滨), CUI Xuewu(崔学武), LU Ping(卢平), YANG Qingwei(杨青巍), DUAN Xuru(段旭如). Spectral Analysis in EUV Range for Study of Core Impurity Behavior in HL-2A[J]. Plasma Science and Technology, 2014, 16(2): 89-92. DOI: 10.1088/1009-0630/16/2/01
[6]	DONG Chunfeng (董春凤), Shigeru MORITA, Motoshi GOTO, WANG Erhui (王二辉), Gen MOTOJIAMA Izumi MURAKAMI, Ryuichi SAKAMOTO, Norimasa YAMAMOTO. Observation of Impurity Accumulation After Hydrogen Multi-Pellet Injection in Large Helical Device[J]. Plasma Science and Technology, 2013, 15(3): 230-234. DOI: 10.1088/1009-0630/15/3/08
[7]	WANG Erhui (王二辉), S. MORITA, M. GOTO, DONG Chunfeng (董春凤). Observation of the Two-Dimensional Distribution of Impurity Line Emissions Using a Space-Resolved EUV Spectrometer in LHD[J]. Plasma Science and Technology, 2013, 15(2): 106-109. DOI: 10.1088/1009-0630/15/2/05
[8]	FU Jia (符佳), LI Yingying (李颖颖), SHI Yuejiang (石跃江), WANG Fudi (王福地), ZHANG Wei (张伟), LV Bo (吕波), HUANG Juang (黄娟), WAN Baonian (万宝年), ZHOU Qian (周倩). Spectroscopic Measurements of Impurity Spectra on the EAST Tokamak[J]. Plasma Science and Technology, 2012, 14(12): 1048-1053. DOI: 10.1088/1009-0630/14/12/03
[9]	DONG Chunfeng, Shigeru MORITA, Motoshi GOTO, Masahiro KOBAYASHI. Study on Radial Position of Impurity Ions in Core and Edge Plasma of LHD Using Space-Resolved EUV Spectrometer[J]. Plasma Science and Technology, 2011, 13(2): 140-144.
[10]	WANG Junyi (王君一), CHEN Yiping(陈一平). Study of Carbon Impurity Transport at SOL in EAST[J]. Plasma Science and Technology, 2010, 12(5): 535-539.

Cited By

Cited by

Periodical cited type(6)

1.	Shi, Y., Song, X., Guo, D. et al. Strategy and experimental progress of the EXL-50U spherical torus in support of the EHL-2 project. Plasma Science and Technology, 2025, 27(2): 024003. DOI:10.1088/2058-6272/ad9e8f
2.	Qi, H., Wang, J. Study on the electron dynamics of MoS2under ultraviolet femtosecond laser irradiation. Procedia Computer Science, 2025. DOI:10.1016/j.procir.2025.01.006
3.	Qi, H., Wang, J. Study on the electron dynamics of MoS2under ultraviolet femtosecond laser irradiation. Procedia CIRP, 2025. DOI:10.1016/j.procir.2025.01.006
4.	Mou, J., Li, Y., Li, Y. et al. Electron density measurement by the three boundary channels of HCOOH laser interferometer on the HL-3 tokamak. Plasma Science and Technology, 2024, 26(3): 034013. DOI:10.1088/2058-6272/ad127a
5.	Chen, J., Xiao, D., Xiong, Y. et al. Design and analysis of kA stepped pulse current generation scheme \| [kA 级双阶梯脉冲电源方案设计与分析]. Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams, 2024, 36(2): 025012. DOI:10.11884/HPLPB202436.230243
6.	Zhang, N., Liu, H.Q., Xie, J.X. et al. Development of a dual HCN laser interferometer on a small tokamak device. Journal of Instrumentation, 2023, 18(10): C10008. DOI:10.1088/1748-0221/18/10/C10008

Other cited types(0)

Get Citation

PDF

XML

Article views (251) PDF downloads (508) Cited by(6)

Turn off MathJax

Article Contents

Abstract

References

Influence of impurity seeding on the plasma radiation in the EAST tokamak