中国物理B ›› 1993, Vol. 2 ›› Issue (10): 721-730.doi: 10.1088/1004-423X/2/10/001

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EFFECTS OF BOOTSTRAP CURRENT ON ENERGY CONFINEMENT OF TOKAMAK PLASMAS

袁鹰, 高庆第, 邱孝明, 牟宗泽   

  1. Southwestern Institute of Physics, P. O. Box 432, Chengdu 610041, China
  • 收稿日期:1992-11-19 出版日期:1993-10-20 发布日期:1993-10-20

EFFECTS OF BOOTSTRAP CURRENT ON ENERGY CONFINEMENT OF TOKAMAK PLASMAS

YUAN YING (袁鹰), GAO QING-DI (高庆第), QIU XIAO-MING (邱孝明), MOU ZONG-ZE (牟宗泽)   

  1. Southwestern Institute of Physics, P. O. Box 432, Chengdu 610041, China
  • Received:1992-11-19 Online:1993-10-20 Published:1993-10-20

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摘要： Based on the principle of profile consistency and ηi-mode induced anomalous transport model, the enery confinement in tokamak plasmas is studied with inclusion of the bootstrap curreut in which the poloidal magnetic field is consistently deter-mined. The results show that bootstrap current has a significant effect on plasma confinement. If the bootstrap current is (15-30)% of the total current, global energy confinement time may increase by (20-45)%, and the maximum of related energy store is almost as much as twice the value without bootstrap current. Variation of the energy confinement time with the plasma parameters is of similar trend with Kaye-Goldston scaling. In addition, it can be seen that the radius of q=l surface decreases with bootstrap current, which may be one of the possible mechanisms for some experimental results where sawtooth oscillation disappears because of auxiliary heating.

Abstract: Based on the principle of profile consistency and $\eta$i-mode induced anomalous transport model, the enery confinement in tokamak plasmas is studied with inclusion of the bootstrap curreut in which the poloidal magnetic field is consistently deter-mined. The results show that bootstrap current has a significant effect on plasma confinement. If the bootstrap current is (15-30)% of the total current, global energy confinement time may increase by (20-45)%, and the maximum of related energy store is almost as much as twice the value without bootstrap current. Variation of the energy confinement time with the plasma parameters is of similar trend with Kaye-Goldston scaling. In addition, it can be seen that the radius of q=l surface decreases with bootstrap current, which may be one of the possible mechanisms for some experimental results where sawtooth oscillation disappears because of auxiliary heating.

中图分类号:  (Tokamaks, spherical tokamaks)

  • 52.55.Fa
52.25.Fi (Transport properties) 52.35.Ra (Plasma turbulence) 52.25.Kn (Thermodynamics of plasmas) 52.65.-y (Plasma simulation)