Kinetic equilibrium reconstruction for the NBI-and ICRH-heated H-mode plasma on EAST tokamak
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摘要
The equilibrium reconstruction is important to study the tokamak plasma physical processes.To analyze the contribution of fast ions to the equilibrium,the kinetic equilibria at two time-slices in a typical H-mode discharge with different auxiliary heatings are reconstructed by using magnetic diagnostics,kinetic diagnostics and TRANSP code.It is found that the fast-ion pressure might be up to one-third of the plasma pressure and the contribution is mainly in the core plasma due to the neutral beam injection power is primarily deposited in the core region.The fast-ion current contributes mainly in the core region while contributes little to the pedestal current.A steep pressure gradient in the pedestal is observed which gives rise to a strong edge current.It is proved that the fast ion effects cannot be ignored and should be considered in the future study of EAST.
The equilibrium reconstruction is important to study the tokamak plasma physical processes.To analyze the contribution of fast ions to the equilibrium,the kinetic equilibria at two time-slices in a typical H-mode discharge with different auxiliary heatings are reconstructed by using magnetic diagnostics,kinetic diagnostics and TRANSP code.It is found that the fast-ion pressure might be up to one-third of the plasma pressure and the contribution is mainly in the core plasma due to the neutral beam injection power is primarily deposited in the core region.The fast-ion current contributes mainly in the core region while contributes little to the pedestal current.A steep pressure gradient in the pedestal is observed which gives rise to a strong edge current.It is proved that the fast ion effects cannot be ignored and should be considered in the future study of EAST.
The equilibrium reconstruction is important to study the tokamak plasma physical processes.To analyze the contribution of fast ions to the equilibrium,the kinetic equilibria at two time-slices in a typical H-mode discharge with different auxiliary heatings are reconstructed by using magnetic diagnostics,kinetic diagnostics and TRANSP code.It is found that the fast-ion pressure might be up to one-third of the plasma pressure and the contribution is mainly in the core plasma due to the neutral beam injection power is primarily deposited in the core region.The fast-ion current contributes mainly in the core region while contributes little to the pedestal current.A steep pressure gradient in the pedestal is observed which gives rise to a strong edge current.It is proved that the fast ion effects cannot be ignored and should be considered in the future study of EAST.
引文
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[2]Wan B N et al 2017 Nucl.Fusion 57 102019
[3]Lao L L et al 1985 Nucl.Fusion 25 1611
[4]Blum J et al 1990 Nucl.Fusion 30 1475
[5]Mc Carthy P J 1999 Phys.Plasmas 6 3554
[6]Lao L L et al 2005 Fusion Sci.Technol.48 968
[7]Zakharov L E et al 2008 Phys.Plasmas 15 062507
[8]Mc Carthy P J and(ASDEX Upgrade Team)2012 Plasma Phys.Control.Fusion 54 015010
[9]Li G Q et al 2013 Plasma Phys.Control.Fusion 55 125008
[10]Qian J P et al 2009 Plasma Sci.Technol.11 142
[11]Hu C D 2012 Plasma Sci.Technol.14 871
[12]Hu C D and Team N B I 2012 Plasma Sci.Technol.14 567
[13]Hu C D and(The NBI Team)2013 Plasma Sci.Technol.15 201
[14]Zhang X J et al 2011 Plasma Sci.Technol.13 172
[15]Pfeiffer W W et al 1980 ONETWO:A Computer Code for Modeling Plasma Transport in Tokamaks(San Diego,CA:General Atomic Co.)
[16]John H St et al 1994 Transport Simulation of Negative Magnetic Shear Discharges(San Diego,CA:General Atomics Co.)
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[18]JET Team 2002 Nucl.Fusion 42 86
[19]Sharapov S E et al 2018 Plasma Phys.Control.Fusion 60014026
[20]Wolf R C et al 1993 Nucl.Fusion 33 1835
[21]Budny R V 1994 Nucl.Fusion 34 1247
[22]Pankin A et al 2004 Comput.Phys.Commun.159 157
[23]Brambilla M 1999 Plasma Phys.Control.Fusion 41 1
[24]Sauter O,Angioni C and Lin-Liu Y R 1999 Phys.Plasmas6 2834
[25]Sauter O,Angioni C and Lin-Liu Y R 2002 Phys.Plasmas9 5140
[26]Ding B J et al 2011 Phys.Plasmas 18 082510
[27]Zhao L M et al 2010 Plasma Sci.Technol.12 118
[28]Jia H et al 2013 Plasma Sci.Technol.15 834
[29]Liu F K et al 2015 Nucl.Fusion 55 123022
[30]Wang X J et al 2015 Fusion Eng.Des.96-97 181
[31]Zang Q et al 2010 Plasma Sci.Technol.12 144
[32]Zang Q et al 2011 Rev.Sci.Instrum.82 063502
[33]Liu H Q et al 2013 JINST 8 C11002
[34]Chen Y J et al 2015 Rev.Sci.Instrum.86 023509
[35]Li Y Y et al 2016 Rev.Sci.Instrum.87 11E501
[36]Yin X H et al 2016 Rev.Sci.Instrum.87 11E539
[37]Shi Y J et al 2010 Plasma Phys.Control.Fusion 52 085014
[38]Lu B et al 2012 Rev.Sci.Instrum.83 10E130
[39]Wang J F et al 2010 Plasma Sci.Technol.12 289
[40]Wang J et al 2012 Phys.Scr.85 035502
[41]Levinton F M et al 1989 Phys.Rev.Lett.63 2060
[42]Thomas D M 2003 Rev.Sci.Instrum.74 1541
[43]Thomas D M et al 2004 Phys.Rev.Lett.93 065003
[44]Wade M R,Murakami M and Politzer P A 2004 Phys.Rev.Lett.92 235005
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[46]Li J C et al 2016 Phys.Plasmas 23 122504
[47]Sirén P et al 2015 Plasma Phys.Control.Fusion 57 075015
[48]Stix T H 1972 Plasma Phys.14 367
[49]Huang Q H et al 2012 Phys.Scr.85 055503
[50]Qian J P et al 2017 Nucl.Fusion 57 036008