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Multi-machine benchmark of the self-consistent 1D scrape-off layer model DIV1D from stagnation point to target with SOLPS-ITER
Plasma Physics and Controlled Fusion ( IF 2.2 ) Pub Date : 2024-03-15 , DOI: 10.1088/1361-6587/ad2e37
G L Derks , E Westerhof , M van Berkel , J H Jenneskens , J T W Koenders , S Mijin , D Moulton , H Reimerdes , H Wu

This paper extends a 1D dynamic physics-based model of the scrape-off layer (SOL) plasma, DIV1D, to include the core SOL and possibly a second target. The extended model is benchmarked on 1D mapped SOLPS-ITER simulations to find input settings for DIV1D that allow it to describe SOL plasmas from upstream to target—calibrating it on a scenario and device basis. The benchmark shows a quantitative match between DIV1D and 1D mapped SOLPS-ITER profiles for the heat flux, electron temperature, and electron density within roughly 50% on: (1) the Tokamak Configuration Variable (TCV) for a gas puff scan; (2) a single SOLPS-ITER simulation of the Upgraded Mega Ampere Spherical Tokamak; and (3) the Upgraded Axially Symmetric Divertor EXperiment in Garching Tokamak (AUG) for a simultaneous scan in heating power and gas puff. Once calibrated, DIV1D self-consistently describes dependencies of the SOL solution on core fluxes and external neutral gas densities for a density scan on TCV whereas a varying SOL width is used in DIV1D for AUG to match a simultaneous change in power and density. The ability to calibrate DIV1D on a scenario and device basis is enabled by accounting for cross field transport with an effective flux expansion factor and by allowing neutrals to be exchanged between SOL and adjacent domains.

中文翻译:

使用 SOLPS-ITER 对自洽一维刮除层模型 DIV1D 从停滞点到目标进行多机基准测试

本文扩展了基于一维动态物理的刮除层 (SOL) 等离子体模型 DIV1D,以包括核心 SOL 和可能的第二个目标。扩展模型以一维映射 SOLPS-ITER 模拟为基准,以查找 DIV1D 的输入设置,使其能够描述从上游到目标的 SOL 等离子体,并在场景和设备的基础上对其进行校准。该基准显示 DIV1D 和 1D 映射的 SOLPS-ITER 曲线之间的热通量、电子温度和电子密度在大约 50% 范围内的定量匹配:(1) 用于气体喷射扫描的托卡马克配置变量 (TCV); (2) 升级版兆安球形托卡马克的单一 SOLPS-ITER 模拟; (3) 加兴托卡马克 (AUG) 的升级版轴对称偏滤器实验,用于同时扫描加热功率和气体喷流。校准后,DIV1D 自洽地描述了 SOL 解决方案对 TCV 密度扫描的核心通量和外部中性气体密度的依赖性,而 AUG 的 DIV1D 中使用不同的 SOL 宽度来匹配功率和密度的同时变化。通过考虑具有有效通量扩展因子的跨场传输以及允许在 SOL 和相邻域之间交换中性子,可以实现在场景和设备基础上校准 DIV1D 的能力。
更新日期:2024-03-15
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