Analysis of diffusive coefficient of electron heat pulse based on singular value decomposition in HT-7 tokamak

doi:10.1088/1674-1056/19/3/035203

中国物理B ›› 2010, Vol. 19 ›› Issue (3): 35203-035203.doi: 10.1088/1674-1056/19/3/035203

Analysis of diffusive coefficient of electron heat pulse based on singular value decomposition in HT-7 tokamak

李二众, 凌必利, 刘永, 提昂, 胡立群, 高翔

Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China

收稿日期:2009-02-25 修回日期:2009-09-01 出版日期:2010-03-15 发布日期:2010-03-15

Analysis of diffusive coefficient of electron heat pulse based on singular value decomposition in HT-7 tokamak

Li Er-Zhong(李二众)^†, Ling Bi-Li(凌必利), Liu Yong(刘永), Ti Ang(提昂), Hu Li-Qun(胡立群), and Gao Xiang(高翔)

Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China

Received:2009-02-25 Revised:2009-09-01 Online:2010-03-15 Published:2010-03-15

摘要/Abstract

摘要： In this paper, singular value decomposition (SVD) as a filter-noise method is applied to electron cyclotron emission (ECE) diagnostic signals. The decomposed vectors contain the information about sawtooth such as the temporal vectors that show the sawtooth period and the spatial vectors that indicate the inverse radius. The propagation of electron heat pulse is investigated from electron cyclotron emission signals by using the perturbation method in HT-7 tokamak. The heat diffusivities are obtained at different densities in ohmic plasmas. The special result is that the heat diffusivity becomes larger as the heat pulse propagates outwards from the outside of the inverse radius.

Abstract: In this paper, singular value decomposition (SVD) as a filter-noise method is applied to electron cyclotron emission (ECE) diagnostic signals. The decomposed vectors contain the information about sawtooth such as the temporal vectors that show the sawtooth period and the spatial vectors that indicate the inverse radius. The propagation of electron heat pulse is investigated from electron cyclotron emission signals by using the perturbation method in HT-7 tokamak. The heat diffusivities are obtained at different densities in ohmic plasmas. The special result is that the heat diffusivity becomes larger as the heat pulse propagates outwards from the outside of the inverse radius.

Key words: electron cyclotron emission, ohmic plasma, heat diffusivity, tokamak

中图分类号: (Tokamaks, spherical tokamaks)

52.55.Fa

52.25.Os (Emission, absorption, and scattering of electromagnetic radiation ?) 52.70.Gw (Radio-frequency and microwave measurements) 52.65.Vv (Perturbative methods) 52.25.Fi (Transport properties)

李二众, 凌必利, 刘永, 提昂, 胡立群, 高翔. Analysis of diffusive coefficient of electron heat pulse based on singular value decomposition in HT-7 tokamak[J]. 中国物理B, 2010, 19(3): 35203-035203.

Li Er-Zhong(李二众), Ling Bi-Li(凌必利), Liu Yong(刘永), Ti Ang(提昂), Hu Li-Qun(胡立群), and Gao Xiang(高翔). Analysis of diffusive coefficient of electron heat pulse based on singular value decomposition in HT-7 tokamak[J]. Chin. Phys. B, 2010, 19(3): 35203-035203.

参考文献 26

[1]	Shi Y J, Wan B N, Chen Z Y, Hu L Q, Lin S Y, Ruan H L, Qin J P, Zhen XJ, Ding B J, Kuang G L, Li J G and HT-7 Team 2005 Chin. Phys. 14 1193
[2]	Takase Y, Goldston R J, Bell M G, Cavallo A, Fredrickson E D, Grek B,Hill K W, Mccune D C, Park H K and Schivell J F 1992 Nucl. Fusion 32 2246
[3]	Sun H J, Ding X T, Yao L H, Feng B B, Liu Z T, Gao Y D, Li W, Li X H,Duan X R and Yang Q W 2009 Chin. Phys. Lett. 26 035202
[4]	Xu Y, Hu L Q, Wan B N and Shi Y J 2003 Plasma Sci. Technol. 5 1695
[5]	Lopescardozo N J, Dehaas J C M, Hogeweij G M D, Orourke J, Sips A C Cand Tubbing B J D 1990 Plasma Phys. Control. Fusion 32 983
[6]	Du Q, Ling B L, Ti A, Gao X, Fei Q S, Sajjad S and Xiong G 2008 PlasmaSci. Technol. 10 681
[7]	Nardonet C 1992 Plasma Phys. Control. Fusion 34 1447
[8]	Dong Y B, Pan C H, Liu Y and Fu B Z 2004 Plasma Sci. Technol. 6 2307
[9]	Ma T P, Hu L Q, Wan B N, Ruan H L, Gao X, Zhen X J, Zhou L W, Sun Y W,Chen Z Y, Lin S Y and Kong W 2005 Chin. Phys. 14 2061
[10]	Ma T P, Ruan H L, Hu L Q, Wan B N, Gao X, Zhen X J, Zhou L W, Sun Y W,Gao W, Chen Z Y, Lin S Y and Kong W 2006 Chin. Phys. 15 0593
[11]	Lopescardozo N J and Sips A C C 1991 Plasma Phys. Control. Fusion 33 1337
[12]	Callen J D and Jahns G L 1977 Phys. Rev. Lett. 38 491
[13]	Pandya H K B, Jain K K and Aditya Team 2007 Plasma Phys. Control.Fusion 49 1809
[14]	Shi Z B, Ding X T, Rao J, Li Y L, Deng W, Liu Z T, Liu Y and Zhou Y2007 Plasma Sci. Technol. 9 534
[15]	Fredrickson E D, Janos A C, Mcguire K M, Scott S D, Taylor G and ChangZ 1993 Nucl. Fusion 33 1759
[16]	Soler M and Callen J D 1979 Nucl. Fusion 19 703
[17]	Sun H J, Ding X T, Yao L H, Rao J, Liu Z T, Huang Y, Dong C F, Li W,Duan X R, Yan Q W and Liu Y 2008 (Proc. 11th IAEA Meeting onH-mode Physics and Transport Barriers) J. Phys. Conference Series 123 012016
[18]	Itoh K, Itoh S I, Fukuyama A, Yagi M and Azumi M 1994 PlasmaPhys. Control. Fusion 36 279
[19]	Itoh K 1994 Plasma Phys. Control. Fusion 36 A307
[20]	Itoh S I and Itoh K 1994 Plasma Phys. Control. Fusion 36 1845
[21]	Itoh S I, Itoh K, Fukuyama and Yagi M 1994 Phys. Rev. Lett. 72 1200
[22]	Itoh K, Itoh S I and Fukuyama A 1992 Phys. Rev. Lett. 69 1050
[23]	Yoshino R and Tokuda S 2000 Nucl. Fusion 40 1293
[24]	Tokuda S and Yoshino R 1999 Nucl. Fusion 39 1123
[25]	Savrukhin P V 2002 Phys. Plasmas 9 3421
[26]	Barnes C W and Strachan J D 1982 Nucl. Fusion 22 1090

Analysis of diffusive coefficient of electron heat pulse based on singular value decomposition in HT-7 tokamak

Analysis of diffusive coefficient of electron heat pulse based on singular value decomposition in HT-7 tokamak

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