Two gas-puffs are used near limiters in the FT-2 tokamak for the purpose of hydrogen refuelling during plasma discharges. This creates toroidal and poloidal asymmetry in particle sources near limiters which has to be considered in modelling. Here, the effect of toroidal asymmetry is simulated using the gyrokinetic code ELMFIRE. Two slightly different toroidal particle sources are used in simulations, and their results are compared with each other, and with experimental measurements to understand the impact of toroidal particle sources on Scrape-off Layer (SOL) physics.

中文翻译：

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FT-2 托卡马克中环形粒子源对 SOL 物理的影响

在 FT-2 托卡马克装置的限制器附近使用了两个充气装置，用于在等离子体放电期间补充氢气。这会在限制器附近的粒子源中产生环形和极向不对称性，这在建模中必须加以考虑。在这里，使用旋动代码 ELMFIRE 模拟了环形不对称的影响。模拟中使用了两种略有不同的环形粒子源，并将它们的结果相互比较，并与实验测量结果进行比较，以了解环形粒子源对刮除层 (SOL) 物理的影响。