The similarity of divertor tokamaks is studied in two steps. First, in the context of a toroidal divertor simulator, we modify the `isolated divertor' approach of Lackner to allow the field line angle in the divertor to vary. This enables all the relevant dimensionless plasma parameters to be matched in a scaled experiment, while reducing the required heating power and target heat flux. This modification preserves the important ratio of neutral mean free path to divertor plasma width, but mismatches the less important ratio of neutral mean free path to divertor depth. In the second step, we consider the problem of approximate generalized similarity in existing tokamaks with constrained divertor depths. A least squares similarity fitting approach is described and applied for different transport assumptions. It shows that existing tokamaks can approximate the dimensionless parameters of the ITER divertor very closely
偏滤器托卡马克的相似性研究分两步进行。首先，在环形偏滤器模拟器的背景下，我们修改了Lackner的“孤立偏滤器”方法，以允许偏滤器中场线角度变化。这使得在缩比实验中能够匹配所有相关的无量纲等离子体参数，同时降低所需的加热功率和靶板热通量。该修改保留了中性粒子平均自由程与偏滤器等离子体宽度之比这一重要参数，但未能匹配中性粒子平均自由程与偏滤器深度之比这一次要参数。第二步，我们考虑在现有托卡马克中，在偏滤器深度受限的条件下，实现近似广义相似性的问题。我们描述了一种最小二乘相似性拟合方法，并将其应用于不同的输运假设。结果表明，现有托卡马克能够非常接近地近似ITER偏滤器的无量纲参数。