@misc{oai:repo.qst.go.jp:00079258,
 author = {YAGI, Masatoshi and MIYATO, Naoaki and TAKIZUKA, Tomonori and KASUYA, Naohiro and SCOTT, Bruce and Yagi, Masatoshi and Miyato, Naoaki},
 month = {Aug},
 note = {Understanding of particle pinch mechanism in the peripheral region is an important issue to supply D-T fuels for future tokamak reactors. Using a delta-f electromagnetic gyrokinetic simulation code dFEFI, we investigated a local dynamics of particle transport in the case of inverted density gradient. It was shown that in the nonlinear phase, the lower wave number mode becomes dominant, which produces an inward particle flux.In the present work, to understand these simulation results, we revisit the ion-mixing mode model. We find that there exist two unstable modes, namely, the ion-mixing mode and the electron drift wave. The ion-mixing mode is driven by negative compression (slab ITG mode) and nonadiabatic electron response through parallel electron heat conductivity. The toroidal effect is subdominant. In the case of inverted density gradient, the electron drift wave is more destabilized by the nonadiabatic electron response through the parallel electron heat conductivity., 17th International Workshop on Plasma Edge Theory in Fusion Devices},
 title = {Particle transport with inverted density gradient in peripheral region of tokamak},
 year = {2019}
}