Estimation of Neutral Density in Edge Plasma with Double Null Configuration in EAST

ZHANG Ling; XU Guosheng; DING Siye; GAO Wei; WU Zhenwei; CHEN Yingjie; HUANG Juan

Plasma Science and Technology > 2011 > 13(4): 431-434.

ZHANG Ling, XU Guosheng, DING Siye, GAO Wei, WU Zhenwei, CHEN Yingjie, HUANG Juan. Estimation of Neutral Density in Edge Plasma with Double Null Configuration in EAST[J]. Plasma Science and Technology, 2011, 13(4): 431-434.

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Estimation of Neutral Density in Edge Plasma with Double Null Configuration in EAST

Institute of Plasma Physics, Chinese Academy of Science, Hefei 230030, China

Funds: supported by National Natural Science Foundation of China (Nos.11075181, 10605028 and 11075180), also in part by the JSPS-CAS Core-University program in the field of ‘Plasma and Nuclear Fusion’

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Received Date: December 02, 2010

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Abstract

Abstract

In this work, population coefficients of hydrogen’s n=3 excited state from the hydrogen collisional-radiative (CR) model, from the data file of DEGAS 2, are used to calculate the photon emissivity coefficients (PECs) of hydrogen Balmer-α (n=3→2) (Hα). The results are compared with the PECs from Atomic Data and Analysis Structure (ADAS) database, and a good agreement is found. A magnetic surface-averaged neutral density profile of typical double-null (DN) plasma in EAST is obtained by using FRANTIC, the 1.5-D fluid transport code. It is found that the sum of integral Dα and Hα emission intensity calculated via the neutral density agrees with the measured results obtained by using the absolutely calibrated multi-channel poloidal photodiode array systems viewing the lower divertor at the last closed flux surface (LCFS). It is revealed that the typical magnetic surface-averaged neutral density at LCFS is about 3.5×1016m-3.
- neutral density,
- photon emissivity coefficients,
- collisional-radiative (CR) model,
- edge plasma

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[1]	Mingjie ZHOU, Haiyun TAN, Lanjian ZHUGE, Xuemei WU. Tunable topological edge state in plasma photonic crystals[J]. Plasma Science and Technology, 2024, 26(11): 115501. DOI: 10.1088/2058-6272/ad62d5
[2]	Haidong LU (卢海东), Maogen SU (苏茂根), Qi MIN (敏琦), Shiquan CAO (曹世权), Siqi HE (何思奇), Chenzhong DONG (董晨钟), Yanbiao FU (符彦飙). Effect of dielectronic recombination on charge-state distribution in laser-produced plasma based on steady-state collisional-radiative models[J]. Plasma Science and Technology, 2020, 22(10): 105001. DOI: 10.1088/2058-6272/ab9889
[3]	Yadong HUANG (黄亚冬), Benmou ZHOU (周本谋). Active control of noise amplification in the flow over a square leading-edge flat plate utilizing DBD plasma actuator[J]. Plasma Science and Technology, 2018, 20(5): 54021-054021. DOI: 10.1088/2058-6272/aab5bb
[4]	P DREWS, H NIEMANN, J COSFELD, Y GAO, J GEIGER, O GRULKE, M HENKEL, D HÖSCHEN, K HOLLFELD, C KILLER, AKRÄMER-FLECKEN, Y LIANG, S LIU, D NICOLAI, O NEUBAUER, M RACK, B SCHWEER, G SATHEESWARAN, L RUDISCHHAUSER, N SANDRI, N WANG, the W-X Team. Magnetic configuration effects on the edge heat flux in the limiter plasma on W7-X measured using the infrared camera and the combined probe[J]. Plasma Science and Technology, 2018, 20(5): 54003-054003. DOI: 10.1088/2058-6272/aaa968
[5]	ZHU Dahuan (朱大焕), LIU Yang (刘洋), CHEN Junling (陈俊凌), ZHOU Zhangjian (周张健), YAN Rong (鄢容). Surface Cracking Behaviors of Ultra-Fine Grained Tungsten Under Edge Plasma Loading in the HT-7 Tokamak[J]. Plasma Science and Technology, 2013, 15(6): 605-608. DOI: 10.1088/1009-0630/15/6/21
[6]	ZANG Linge (臧临阁), M. TAKEUCHI, N. NISHINO, T. MIZUUCHI, S. OHSHIMA, K. KASAJIMA, M. SHA, K. MUKAI, et al. Observation of Edge Plasma Fluctuations with a Fast Camera in Heliotron J[J]. Plasma Science and Technology, 2013, 15(3): 213-216. DOI: 10.1088/1009-0630/15/3/04
[7]	WU Wangping (吴王平), CHEN Zhaofeng (陈照峰), LIU Yong (刘勇). Iridium Coating Deposited By Using the Double Glow Plasma Technique ----Effect of Glow Plasma on Structure of Coating at Single Substrate Edge[J]. Plasma Science and Technology, 2012, 14(10): 909-914. DOI: 10.1088/1009-0630/14/10/10
[8]	LIU Yang(刘洋), ZHU Dahuan(朱大焕), CHEN Junling(陈俊凌), ZHOU Zhangjian(周张健), YAN Rong(鄢容). Exposure of W-TiC/Cu Functionally Graded Materials in the Edge Plasma of HT-7 Tokamak[J]. Plasma Science and Technology, 2012, 14(2): 177-180. DOI: 10.1088/1009-0630/14/2/18
[9]	CHEN Yiping, H. KAWASHIMA, N. ASAKURA, K. SHIMIZU, H. TAKENAGA. Modelling of Edge Plasma on JT-60U Tokamak by Using SOLPS5.0 code[J]. Plasma Science and Technology, 2011, 13(3): 302-306.
[10]	ZHU Ximing (朱悉铭), PU Yikang (蒲以康). Determination of Non-Maxwellian Electron Energy Distributions in Low-Pressure Plasmas by Using the Optical Emission Spectroscopy and a Collisional-Radiative Model[J]. Plasma Science and Technology, 2011, 13(3): 267-278.