H-mode plasmas in ASDEX Upgrade (AUG) using different hydrogen isotopes are analysed with respect to their core transport properties. The experimental results are discussed and we present gyrokinetic simulations which are able to reproduce the experimental observations. A novel strategy allows us to disentangle core and pedestal physics by mitigating the isotopic dependence of pedestal properties while keeping the heat and particle sources the same. Matched pedestal profiles are obtained between hydrogen (H) and deuterium (D) plasmas when increasing the triangularity in H plasmas with respect to D plasmas. In the core of these plasmas little isotopic dependence is observed when the fast-ion content is low W _fast/W _th < 1/3. Quasi-linear modelling with TGLF reproduces the experimental trends under these conditions. For larger fast-ion fractions an isotope dependence is observed in the core heat transport. This is related to a difference in fast-ion stabilization of turbulent transport. The fast-ion pressure in H and D plasmas is different due to the mass dependence in the fast-ion slowing down time as well as to operational restrictions when heating with H neutral beam injection (H-NBI) or D-NBI. Typically, W _fast,H < 1/2W _fast,D for comparable NBI heating powers in AUG. The gyrokinetic analysis shows that linear growth rates of ITG modes do not show a pure gyro-Bohm mass dependence, but follow the experimentally observed mass dependence when taking collisions, EM-effects and fast ions into account. Non-linear gyrokinetic simulations reproduce the experimental heat fluxes for different isotopes when fast ions are included. This highlights the role of the fast-ion pressure as a key element to explain the observed differences in the core of H and D plasmas.

关于ASDEX升级（AUGEX）中使用不同氢同位素的H型等离子体，对其核心传输特性进行了分析。讨论了实验结果，我们提出了能够模拟实验结果的陀螺动力学模拟。一种新颖的策略允许我们在保持热量和粒子源相同的情况下，通过减轻基座特性对同位素的依赖性来解开核心和基座物理学。当相对于D等离子体增加H等离子体中的三角形性时，会在氢（H）和氘（D）等离子体之间获得匹配的基座轮廓。在这些等离子体的核心小同位素依赖性观察时，快速离子含量低W¯¯ _快/ w ^ _第<1/3。准线性建模TGLF再现了在这些条件下的实验趋势。对于较大的快离子分数，在堆芯传热中观察到同位素依赖性。这与湍流传输的快速离子稳定不同有关。H和D等离子体中的快离子压力不同，这是由于快离子减慢时间的质量依赖性以及使用H中性束注入（H-NBI）或D-NBI进行加热时的操作限制所致。通常，W _快速，H <1/2 W _快速，D可用于AUG中可比的NBI加热功率。陀螺动力学分析表明，ITG模式的线性增长率并未显示出纯粹的陀螺-波姆质量依赖性，而是在考虑碰撞，EM效应和快速离子时遵循了实验观察到的质量依赖性。当包含快速离子时，非线性陀螺动力学模拟再现了不同同位素的实验热通量。这突出了快速离子压力作为解释H和D等离子体核心中观察到的差异的关键因素的作用。