Chin. Phys. Lett.  2020, Vol. 37 Issue (4): 045202    DOI: 10.1088/0256-307X/37/4/045202
PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
A New Path to Improve High $\beta_{\rm p}$ Plasma Performance on EAST for Steady-State Tokamak Fusion Reactor
Baonian Wan** and the EAST team
Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031
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Baonian Wan and the EAST team 2020 Chin. Phys. Lett. 37 045202
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Abstract High $\beta_{\rm p}$ scenario is foreseen to be a promising candidate operational mode for steady-state tokamak fusion reactors. Dedicated experiments on EAST and data analysis find that density gradient $\nabla n$ is a control knob to improve energy confinement in high $\beta_{\rm p}$ plasmas at low toroidal rotation as projected for a fusion reactor. Different from previously known turbulent stabilization mechanisms such as ${\boldsymbol E} \times {\boldsymbol B}$ shear and Shafranov shift, high density gradient can enhance the Shafranov shift stabilizing effect significantly in high $\beta_{\rm p}$ regime, giving that a higher density gradient is readily accessible in future fusion reactors with lower collisionality. This new finding is of great importance for the next-step fusion development because it may open a new path towards even higher energy confinement in the high $\beta_{\rm p}$ scenario. It has been demonstrated in the recent EAST experiments, i.e., a fully non-inductive high $\beta_{\rm p}$ ($\sim $2) H-mode plasma ($H_{98y2}\ge 1.3$) has been obtained for a duration over 100 current diffusion times, which sets another new world record of long-pulse high-performance tokamak plasma operation with the normalized performance approaching the ITER and CFETR regimes.
Received: 06 March 2020      Published: 25 March 2020
PACS:  52.75.-d (Plasma devices)  
  52.77.Fv (High-pressure, high-current plasmas)  
Fund: Supported by the National Magnetic Confinement Fusion Science Program of China under Grant No. 2015GB103000.
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http://cpl.iphy.ac.cn/10.1088/0256-307X/37/4/045202       OR      http://cpl.iphy.ac.cn/Y2020/V37/I4/045202
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Baonian Wan and the EAST team
[1]Gormezano C et al 2007 Progress in the ITER Physics Basis chap 6: Steady State Operation. Nucl. Fusion 47
[2]Sips A C C 2005 Plasma Phys. Control. Fusion 47 A19
[3]Mukhovatov V 2003 Plasma Phys. Control. Fusion 45 A235
[4]Garofalo A M 2011 Nucl. Fusion 51 083018
[5]Wan Y et al 2017 Nucl. Fusion 57 102009
[6]Wan B et al 2019 Nucl. Fusion 59 112003
[7]Wan B et al 2017 Nucl. Fusion 57 102019
[8]Li J et al 2013 Nat. Phys. 9 817
[9]Liu F K et al 2015 Nucl. Fusion 55 123022
[10]Garofalo A M et al 2017 Nucl. Fusion 57 076037
[11]Gong X 2017 Plasma Sci. Technol. 19 032001
[12]Gong X et al 2019 Nucl. Fusion 59 086030
[13]Qian J P et al 2017 Nucl. Fusion 57 056008
[14]Ding S et al 2017 Phys. Plasmas 24 056114
[15]Huang J et al 2020 Plasma Phys. Control. Fusion 62 014019
[16]Garofalo A M et al 2015 Nucl. Fusion 55 123025
[17]Pan C et al 2017 Nucl. Fusion 57 036018
[18]Garofalo A M et al 2018 Plasma Phys. Control. Fusion 60 014043
[19]Liu H Q et al 2016 Rev. Sci. Instrum. 87 11D903
[20]Kotschenreuther M et al 2019 The 61st Annual Meeting of the American Physical Society, Division of Plasma Physics (Fort Lauderdale, Florida 21–25 October 2019) UP10.100020 http://meetings.aps.org/Meeting/DPP19/Session/UP10.20
[21]Angioni C et al 2003 Phys. Plasmas 10 3225
[22]Weisen H et al 2005 Nucl. Fusion 45 L1
[23]Zhuang G et al 2019 Nucl. Fusion 59 112010
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