ITER Pre-Fusion Power Operation 1 (PFPO-1) phase low-power plasmas are simulated with the SOLEDGE3X-EIRENE code, a multi-fluid edge plasma solver that can describe plasma conditions up to the machine's first wall, including a kinetic description of neutrals. Here, SOLEDGE3X is used in 2D mean-field mode. A throughput scan is performed, reproducing a similar scan from the ITER SOLPS simulations database. The physics assumptions for these simulations are presented, in particular the plasma–neutral interaction model where molecule charge-exchange and ion-molecule elastic collisions have newly been added. Challenges encountered in such up-to-the-wall simulations are discussed, along with remaining open questions. Results are presented with two foci: on targets, and on the rest of the first wall. On targets, conditions transition from attached to partially detached as expected, and toroidally symmetric heat fluxes (i.e. without 3D effects) remain below 5 MW/m², within the divertor design limits. An increase in the parallel heat flux decay length λ_q with throughput is also observed. On the rest of the first wall, increasing puff rate does not only spread power deposited on the target but also increases heat load on the first wall. These fluxes remain however small (<100 kW/m²).

中文翻译：

---

用于计算 ITER 第一壁通量的 SOLEDGE3X 全容器等离子体模拟

ITER Pre-Fusion Power Operation 1 (PFP​​O-1) 阶段低功率等离子体使用 SOLEDGE3X-EIRENE 代码进行模拟，这是一种多流体边缘等离子体求解器，可以描述直到机器第一面壁的等离子体条件，包括动力学描述中立者。这里，SOLEDGE3X 用于 2D 平均场模式。执行吞吐量扫描，从 ITER SOLPS 模拟数据库中复制类似的扫描。提出了这些模拟的物理假设，特别是等离子体-中性相互作用模型，其中新添加了分子电荷交换和离子-分子弹性碰撞。讨论了在这种全面模拟中遇到的挑战，以及剩余的未解决问题。结果以两个焦点呈现：目标和第一面墙的其余部分。在目标上，²、在偏滤器设计范围内。还观察到平行热通量衰减长度λ _{q随着吞吐量的增加。}在第一面墙的其余部分，增加抽吸率不仅会分散沉积在目标上的能量，还会增加第一面墙上的热负荷。然而，这些通量仍然很小（<100 kW/m ²）。