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| 1 | Model on L-to H-Mode Transition Driven with Lower-Hybrid Wave显示文摘In this letter,a model for active suppressing tokamak edge turbulence and hence inducing the L-mode to H-mode transition with lower-hybrid wave(LHW)is proposed.The model includes the two contents:(a)The poloidal sheared flow of plasma is generated by the ponderomotive potential and induced magnetization acting on a tokamak plasma resulting from the oscillating electric field of the injected LHW.(b)During the time the LHW is injected into tokamak edge,the edge turbulence and the LHW-generated plasma poloidal flow compete with each other;if the shear of plasma poloidal flow is large enough to suppress the edge turbulence,the confinement will be remarkably improved and hence the system will enter the H operating mode.This model leads us to find that the threshold LHW power required for edge-turbulence suppression is proportional to A(ω)≡(ω/ωLH)^(2)|(ω/ωLH)^(2)-1|,which enables us to explain the experiment in the JT-60 tokamak with lower-hybrid current drive. | QIU Xiaoming(X.M.Qiu) BAI Lin(L.Bai) | 1994 | Chinese Physics Letters1994，11，11： | 3 |
| 2 | Model on Inducing H-Mode by Biased Electrode in Tokamaks显示文摘In this letter,a model on inducing H-mode by biased electrode in tokamaks is put forward,it successfully explains the experiments in CCT,TEXTOR,and HL-1 with bias. | X.M.Qiu L.Bai L.B.Ran | 1992 | Chinese Physics Letters1992，9，10： | 0 |
| 3 | The η-Pairing Superconductivity in Spin-Density Wave Background显示文摘In this letter,we propose a modified attractive Hubbard model at half filling that can exhibit sup er con ductivity through η-pairing mecha.nism in spin-density wave representation and derive a concise relationship between the energy disparity and the single-particle energy spectrum.This relationship,in the two limits of U,clearly shows that the system does not display sup er con ductivity for very low doping concen・tration.but denionst.ra.tes s up ere on ductivity when the doping concentration exceeds a certain critical value.This conclusion is in quaJitative agreement with the familiar experiments on higli-T_(c) supcrconductivity. | X.M.Qiu Z.J.Wang | 1993 | Chinese Physics Letters1993，10，10： | 0 |
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