The current work reports on the significant rise of the fusion triple product in experiments carried out on the compact spherical tokamak (ST) Globus-M2 with a twofold increase in the toroidal magnetic field. A tenfold rise in the n . T . τ _E product was recorded during an increase in the magnetic field from 0.4 to 0.8T and the plasma current from 0.25 to 0.4 MA at an unchanged auxiliary heating power value. Limited reasons may affect this positive trend, among which are energy confinement improvement and an increase in the efficiency of neutral beam heating. Despite the increase in the magnetic field, the neutral beam injection (NBI) led to clear and reproducible transition to the H-mode accompanied by a decrease in the turbulence level at the plasma edge. It was experimentally confirmed that strong dependence of the energy confinement time on the magnetic field value is conserved at a higher magnetic field approaching 0.8T. Enhancement of energy confinement is connected to a collisionality (ν ^*) decrease. While for conventional tokamaks the confinement dependence on collisionality becomes weaker with decreasing ν ^* dependence, in the ST, in contrast, we observe its strengthening.

目前的工作报告了在紧凑型球形托卡马克 (ST) Globus-M2 上进行的实验中聚变三重产物的显着增加，环形磁场增加了两倍。n增加了十倍。Ť。τ _E在磁场从 0.4 增加到 0.8T 和等离子体电流从 0.25 增加到 0.4MA 期间在辅助加热功率值不变的情况下记录了产物。有限的原因可能会影响这一积极趋势，其中包括能量限制的改进和中性光束加热效率的提高。尽管磁场增加，但中性束注入 (NBI) 导致向 H 模式的清晰且可重复的转变，伴随着等离子体边缘湍流水平的降低。实验证实，在接近 0.8T 的较高磁场下，能量限制时间对磁场值的强烈依赖性是守恒的。能量限制的增强与碰撞性 ( ν ^*） 减少。而对于传统托卡马克，对碰撞的约束依赖性随着ν ^*依赖性的降低而变弱，相反，在 ST 中，我们观察到它的增强。