@misc{oai:repo.qst.go.jp:00067034, author = {Obrejan, Kevin and 井戸村, 泰宏 and 本多, 充 and 井戸村 泰宏 and 本多 充}, month = {Dec}, note = {To better treat heavy impurities, the gyrokinetic full-f Eulerian simulation code GT5D was recently upgraded with an implicit collision solver based on a multi-species linear Fokker-Plank collision operator. While the commonly employed low order approximation of the theory showed good agreement for bulk ions and light impurities, large differences were observed in the presence of moderate or large temperature gradients. Taking into account higher order flows to more accurately recover the friction coefficients in the Pfirsch-Schlüter regime shows good agreement with GT5D.The strong dependency of this new thermal screening factor on electron mass was found to be a potential problem for simulations using kinetic electrons of large masses., 閉じ込め・輸送研究会2018}, title = {Numerical study of the role of higher order flows in neoclassical transport of high-Z impurities}, year = {2018} }