The equilibrium configurations with hollow current density profiles can effectively improve plasma confinement. The stability of the ohmic discharges with hollow current density profiles on the HL-2A tokamak was studied for various parameters, such as plasma poloidal beta β p , the axial and edge safety factors q 0 and q s , as well as the minimum safety factor ##IMG## [http://ej.iop.org/images/0029-5515/60/12/124001/nfabad83ieqn1.gif] {$q_{\mathrm{min}}$} . The results suggest that the restriction to the parameters of discharges with hollow current density profiles is stricter than that of conventional discharges with peaked current density profiles. In the case of q profile with reverse shear, the instability of the configuration is significantly improved with higher β p . As a result, the configuration with a hollow toroidal current profile is stable for...

中文翻译：

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HL-2A托卡马克上具有空心电流分布的欧姆放电的稳定性

具有空心电流密度分布的平衡配置可以有效地改善等离子体的约束。对HL-2A托卡马克上具有空心电流密度分布的欧姆放电的稳定性进行了各种参数研究，例如等离子体倍性ββp，轴向和边缘安全系数q 0和qs以及最小安全系数＃ ＃IMG ## [http://ej.iop.org/images/0029-5515/60/12/124001/nfabad83ieqn1.gif] {$ q _ {\ mathrm {min}} $}。结果表明，对具有空心电流密度分布的放电参数的限制比具有峰值电流密度分布的常规放电的限制更严格。在具有反向剪切力的q轮廓的情况下，较高的βp可显着改善结构的不稳定性。结果是，