Generalized Physics Mechanisms of Plasma Confinement with Radially Sheared Electric Field Formation by High Power ECH and Verification of Newly Developed Plasma Stabilization Method

1.近年来，在热离子模式下，离子约束势高度（φ_c）取得了四次进展，离子温度为几keV，且φ_c随塞式电子回旋加热（ECH）功率的增加而增加。2.势形成的进展导致发现径向剪切电场对湍流抑制和横向电场的显著影响。3.得到了φ_c随密度增加而减小的较好关系，并沿着得到了φ_<19><-3>c随插塞ECH功率增加而恢复的较好关系。4.首次在势垒镜中用离轴ECH产生了横向能量输运势垒，形成具有流过整个装置的高能电子的圆柱形层。这导致抑制层附近的间歇性湍流涡旋状结构，并导致电子温度和离子温度升高，所述层具有局部凸起的双极电势Φ c。5.在标准串联镜操作中，初始中心ECH（170 kW，20 ms）使T_（？）<eO>从70 eV提高到300 eV，T_（？）从4.5 keV提高到6.1 keV，T_<pO>（？）在<pO><EO>240 kW的插头ECH和90 kW的ICH中，φ c囚禁离子的轴上粒子与能量的约束比τ_c/τ_c为1.7（与Pastukhov理论一致），中心镜囚禁离子的轴上粒子与能量的约束比τ_c为2.4（η_<ICH>c = 0.3;nl_c=4.5×10 ~（-1）<17>m ~ 2<-2>）。

1.Four-time progress in ion-confining potential height (φ_c) through these years is achieved in the hot-ion mode with an ion temperature of several keV having the favorably increasing scaling of φ_c with plug electron-cyclotron heating (ECH) powers.2.The advance in the potential formation leads to a finding of remarkable effects of radially sheared electric fields on turbulence suppression and transverse-loss reduction.3.A preferable dependence of a weak decrease in φ_c with increasing density ranging to 〜10^<19> m^<-3> along with the recovery of φ_c with increasing plug ECH powers is obtained.4.A transverse energy-transport barrier is produced by off-axis ECH in a barrier mirror for the first time, with the formation of a cylindrical layer having energetic electrons flowing through the whole device. This leads to suppress intermittent turbulent vortex-like structures near the layer, and results in electron temperature and ion temperature rises surrounded by the layer having a localized bumped ambipolar potential Φ_c. The radial transport barrier is explained by the formation of a strong E_r shear or peaked vorticity W with the direction reversal of E_r×B sheared flow near the Φ_c peak for the turbulence suppression.5.Preliminary central ECH (170kW,20ms) in a standard tandem-mirror operation raises T_<eO> from 70 to 300 eV together with T_<i⊥O> from 4.5 to 6.1 keV, and T_<i//O> from 0.5 to 1.2 keV with τ_<pO>=95 ms for φ_c(=1.4 kV) trapped ions. The on-axis particle to energy confining ratio of τ_<pO>/τ_<EO> is observed to be 1.7 for φ_c trapped ions (consistent with Pastukhov's theory) and 2.4 for central mirror-trapped ions with 240-kW plug ECH and 90-kW ICH (η_<ICH>〜0.3;nl_c=4.5×10^<17>m^<-2>).