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ASCOT orbit-following simulations of ion cyclotron heating with synthetic fast ion loss diagnostic: a first application to ASDEX Upgrade
Nuclear Fusion ( IF 3.3 ) Pub Date : 2021-07-19 , DOI: 10.1088/1741-4326/ac0e71
Seppo Sipil 1 , Jari Varje 1 , Thomas Johnson 2 , Roberto Bilato 3 , Joaqun Galdn-Quiroga 3 , Antti Snicker 1 , Taina Kurki-Suonio 1 , Lucia Sanchs 1 , Davide Silvagni 3 , Javier Gonzlez-Martn 4
Affiliation  

The orbit-following Monte Carlo code ASCOT interfaced with the radiofrequency Monte Carlo library RFOF can simulate radiofrequency heating of ion populations using wave solutions from full-wave solvers such as TORIC. It is applied to the fundamental mode ion cyclotron resonant heating of hydrogen and 2nd harmonic frequency heating of neutral beam injected deuterium in ASDEX Upgrade discharge #33147 to validate the model against fast ion loss detector (FILD) measurements. In addition, for FILD signal simulations requiring enhanced resolution or scanning the effect of various perturbations such as magnetohydrodynamic phenomena near the plasma edge, a two-stage simulation scheme is presented where the fast ion population is first created by a full ASCOT-RFOF ion cyclotron heating simulation, and the resulting distribution is then used as an input to ASCOT’s distribution-sampling marker source module for more efficient simulation of the ICRH ion wall load and FILD signal. A satisfactory agreement with the experimentally observed FILD signal is found.



中文翻译:

具有合成快速离子损失诊断功能的离子回旋加速器加热的 ASCOT 轨道跟踪模拟:首次应用于 ASDEX 升级

轨道跟踪蒙特卡罗代码 ASCOT 与射频蒙特卡罗库 RFOF 接口,可以使用来自全波求解器(如 TORIC)的波解来模拟离子群的射频加热。它应用于 ASDEX 升级放电 #33147 中氢的基模离子回旋共振加热和中性束注入氘的二次谐波频率加热,以验证模型与快速离子损失检测器 (FILD) 测量的对比。此外,对于需要增强分辨率或扫描各种扰动效应(例如等离子体边缘附近的磁流体动力学现象)的 FILD 信号模拟,提出了一种两阶段模拟方案,其中快速离子群首先由完整的 ASCOT-RFOF 离子回旋加速器产生加热模拟,然后将所得分布用作 ASCOT 分布采样标记源模块的输入,以更有效地模拟 ICRH 离子壁负载和 FILD 信号。发现与实验观察到的 FILD 信号令人满意的一致性。

更新日期:2021-07-19
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