Advanced Search+
Feng XU (徐峰), Fang DING (丁芳), Xiahua CHEN (陈夏华), Liang WANG (王亮), Jichan XU (许吉禅), Zhenhua HU (胡振华), Hongmin MAO (毛红敏), Guangnan LUO (罗广南), Zhongshi YANG (杨钟时), Jingbo CHEN (陈竞博), Kedong LI (李克栋). Electron density calculation based on Stark broadening of D Balmer line from detached plasma in EAST tungsten divertor[J]. Plasma Science and Technology, 2018, 20(10): 105102. DOI: 10.1088/2058-6272/aad226
Citation: Feng XU (徐峰), Fang DING (丁芳), Xiahua CHEN (陈夏华), Liang WANG (王亮), Jichan XU (许吉禅), Zhenhua HU (胡振华), Hongmin MAO (毛红敏), Guangnan LUO (罗广南), Zhongshi YANG (杨钟时), Jingbo CHEN (陈竞博), Kedong LI (李克栋). Electron density calculation based on Stark broadening of D Balmer line from detached plasma in EAST tungsten divertor[J]. Plasma Science and Technology, 2018, 20(10): 105102. DOI: 10.1088/2058-6272/aad226

Electron density calculation based on Stark broadening of D Balmer line from detached plasma in EAST tungsten divertor

Funds: This work was supported by National Key Research and Development Program of China (No. 2017YFA0402500) and National Natural Science Foundation of China (Nos. 11575243, 11605238, and 11575242).
More Information
  • Received Date: February 19, 2018
  • The electron density within the volume of the tungsten divertor of the Experimental Advanced Superconducting Tokamak (EAST) is calculated based on Dε line (396.9 nm) Stark broadening (SB) measurements. The quasistatic approximation is employed in the SB calculation of the Dε line. The influences of other broadening mechanisms on the calculation error of electron density have been evaluated. The SB method is applied to the study of spatial distribution and time evolution of the electron density in the W divertor. Two electron density bands are observed in the detached divertor plasma during an L-mode discharge sustained by low hybrid wave (LHW) heating, which could be related to the striated particle flux distribution induced by LHW. After the onset of detachment, the upper electron density band corresponding to outer strike point firstly increases then decreases, while the lower density band corresponding to striated particle flux increases continually although the electron densities from Langmuir Probes at the divertor plate keep a descending trend. This could indicate a downward movement of the radiation region that approximately moves along the magnetic field lines after the onset of detachment.
  • [1]
    Kallenbach A et al 2015 Nucl. Fusion 55 053026
    [2]
    Lipschultz B, Parra F I and Hutchinson I H 2016 Nucl. Fusion 56 056007
    [3]
    Feng W et al 2017 Nucl. Fusion 57 126054
    [4]
    Potzel S et al 2014 Nucl. Fusion 54 013001
    [5]
    Stangeby P C 1993 Nucl. Fusion 33 1695
    [6]
    Leonard A W 2018 Plasma Phys. Control. Fusion 60 044001
    [7]
    Potzel S et al 2014 Plasma Phys. Control. Fusion 56 025010
    [8]
    Mijatovi? Z et al 2010 J. Quant. Spectrosc. Radiat. Transfer 111 990
    [9]
    Kunze H J 2009 Introduction to Plasma Spectroscopy (Berlin: Springer)
    [10]
    Wan B N et al 2015 Nucl. Fusion 55 104015
    [11]
    Wu C R et al 2016 Rev. Sci. Instrum. 87 11D616
    [12]
    Mao H M et al 2017 Rev. Sci. Instrum. 88 043502
    [13]
    Landau L D and Lifshitz E M 1965 Quantum Mechanics: Non- Relativistic Theory ed J B Sykes and J S Bell Trans 2nd edn (Oxford: Pergamon)
    [14]
    Nikiforov A Y et al 2015 Plasma Sources Sci. Technol. 24 034001
    [15]
    Gigosos M A 2014 J. Phys. D Appl. Phys. 47 343001
    [16]
    Griem H R 1974 Spectral Line Broadening by Plasmas (New York: Academic)
    [17]
    Potzel S 2012 Experimental classification of divertor detachment PhD Von der Universit?t Bayreuth, Germany
    [18]
    Stehlé C and Hutcheon R 1999 Astron. Astrophys. Suppl. Ser. 140 93
    [19]
    Rosato J, Marandet Y and Stamm R 2017 J. Quant. Spectrosc. Radiat. Transfer 187 333
    [20]
    McWhirter R W P and Summers H P 1984 Atomic radiation from low density plasma Plasmas: Applied Atomic Collision Physics ed C F Barnett and M F A Harrison vol 2 (Amsterdam: Elsevier) p 52
    [21]
    Bates D R, Kingston A E and McWhirter R W P 1962 Proc. R. Soc. A 267 297
    [22]
    Summers H P et al 2006 Plasma Phys. Control. Fusion 48 263
    [23]
    The ADAS Project http://adas.ac.uk/
    [24]
    Isler R C 1994 Plasma Phys. Control. Fusion 36 171
  • Related Articles

    [1]Yan WANG (王艳), Zhimin LIU (刘智民), Lizhen LIANG (梁立振), Chundong HU (胡纯栋). Preliminary results of optical emission spectroscopy by line ratio method in the RF negative ion source at ASIPP[J]. Plasma Science and Technology, 2019, 21(4): 45601-045601. DOI: 10.1088/2058-6272/aaf592
    [2]Jun WU (吴军), Jian WU (吴健), M T RIETVELD, I HAGGSTROM, Haisheng ZHAO (赵海生), Tong XU (徐彤), Zhengwen XU (许正文). Systematic variation in observing altitude of enhanced ion line by the pump near fifth gyroharmonic[J]. Plasma Science and Technology, 2018, 20(12): 125301. DOI: 10.1088/2058-6272/aadd44
    [3]Xianhai PANG (庞先海), Ting WANG (王婷), Shixin XIU (修士新), Junfei YANG (杨俊飞), Hao JING (景皓). Investigation of cathode spot characteristics in vacuum under transverse magnetic field (TMF) contacts[J]. Plasma Science and Technology, 2018, 20(8): 85502-085502. DOI: 10.1088/2058-6272/aab782
    [4]Xuebao LI (李学宝), Dayong LI (李大勇), Qian ZHANG (张迁), Yinfei LI (李隐飞), Xiang CUI (崔翔), Tiebing LU (卢铁兵). The detailed characteristics of positive corona current pulses in the line-to-plane electrodes[J]. Plasma Science and Technology, 2018, 20(5): 54014-054014. DOI: 10.1088/2058-6272/aaa66b
    [5]HU Yixiang(呼义翔), ZENG Jiangtao(曾江涛), SUN Fengju(孙凤举), WEI Hao(魏浩), YIN Jiahui(尹佳辉), CONG Peitian(丛培天), QIU Aici(邱爱慈). Modeling Methods for the Main Switch of High Pulsed-Power Facilities Based on Transmission Line Code[J]. Plasma Science and Technology, 2014, 16(9): 873-876. DOI: 10.1088/1009-0630/16/9/12
    [6]WU Hanyu(吴撼宇), ZENG Zhengzhong(曾正中), WANG Liangping(王亮平), GUO Ning(郭宁). Experimental Study of Current Loss of Stainless Steel Magnetically Insulated Transmission Line with Current Density at MA/cm Level[J]. Plasma Science and Technology, 2014, 16(6): 625-628. DOI: 10.1088/1009-0630/16/6/16
    [7]ZHU Liying(朱立颖), WU Jianwen(武建文), JIANG Yuan(蒋原). Motion and Splitting of Vacuum Arc Column in Transverse Magnetic Field Contacts at Intermediate-Frequency[J]. Plasma Science and Technology, 2014, 16(5): 454-459. DOI: 10.1088/1009-0630/16/5/03
    [8]DUAN Ping(段萍), ZHOU Xinwei(周新维), LIU Yuan(刘媛), CAO Anning(曹安宁), QIN Haijuan(覃海娟), CHEN Long(陈龙), YIN Yan(殷燕). Effects of Magnetic Field and Ion Velocity on SPT Plasma Sheath Characteristics[J]. Plasma Science and Technology, 2014, 16(2): 161-167. DOI: 10.1088/1009-0630/16/2/13
    [9]LI Hui (李辉), XIE Mingfeng (谢铭丰). Plasma Parameters of a Gliding Arc Jet at Atmospheric Pressure Obtained by a Line-Ratio Method[J]. Plasma Science and Technology, 2013, 15(8): 776-779. DOI: 10.1088/1009-0630/15/8/11
    [10]GUO Jun(郭俊). The Effects of Relative Drift Velocities Between Proton and He2+ on the Magnetic Spectral Signatures in the Plasma Depletion Layer[J]. Plasma Science and Technology, 2011, 13(5): 557-560.

Catalog

    Article views (172) PDF downloads (318) Cited by()

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return