Estimation of fuel particle balance in steady state operation with hydrogen barrier model
Estimation of fuel particle balance in steady state operation with hydrogen barrier model
复制标题
用氢势垒模型估计稳态运行中的燃料颗粒平衡
DOI：
10.1016/j.nme.2019.03.015
复制
发表时间：
2019
影响因子：
2.6
通讯作者：
et al.
中科院分区：
文献类型：
--
作者：
Hanada K.;Yoshida N.;Takagi I.;Hirata T.;Hatayama A.;Okamoto K.;Oya Y.;Shikama T.;et al.
本研究通过密集的任务执行，研究了全金属等离子体壁(PFW)中长时间放电过程中的燃料颗粒平衡。建立了包括产生氢(H)势垒的等离子体诱导沉积层的简单壁面模型，称为H势垒模型。基于H态速率方程和H势垒模型，对实际等离子体最长放电的早期阶段进行了简单的计算。该模型准确地再现了电子密度和壁储氢随时间的演化过程，为实验难以确定的参数选择了合适的数值。采用H势垒模型和全反射模型的比较计算，预测了壁面模型对等离子体密度、时间响应和电子密度值的显著影响，表明应该为全金属PFW器件建立合适的壁面模型。
This research investigated fuel particle balance during long duration discharge in an all-metal plasma facing wall (PFW) through intensive QUEST execution. A simple wall model including the plasma-induced deposition layer that creates hydrogen (H) barriers, called the H barrier model, was established. A simple calculation, based on a combination of H state rate equations and the H barrier model, was applied to real plasma in the early phase of its longest discharge. The model accurately reconstructed the evolutions of electron density and wall-stored H over time, proper values are chosen for the parameters that are difficult to determine experimentally. Comparative calculations that used the H barrier and a fully reflective models, predicted significant impacts of wall models on the plasma density time response and value of electron density, indicating that a proper wall model should be developed for all-metal PFW devices.