Experimental study of perturbative particle transport in the HL-2A tokamak

B Y Zhang; S Inagaki; Z B Shi; W L Zhong; X L Zou; M Jiang; Z C Yang; P W Shi; C Y Chen; G L Xiao; B B Feng; X M Song

doi:10.1016/j.heliyon.2020.e04633

Experimental study of perturbative particle transport in the HL-2A tokamak

Heliyon. 2020 Sep 14;6(9):e04633. doi: 10.1016/j.heliyon.2020.e04633. eCollection 2020 Sep.

Authors

B Y Zhang^{1

2}, S Inagaki¹, Z B Shi², W L Zhong², X L Zou³, M Jiang², Z C Yang², P W Shi², C Y Chen², G L Xiao², B B Feng², X M Song²

Affiliations

¹ Research Institute for Applied Mechanics, Kyushu University, Japan.
² Southwestern Institute of Physics, China.
³ The French Alternative Energies and Atomic Energy Commission, France.

Abstract

Perturbative particle transport experiment has been performed in the HL-2A tokamak by using supersonic molecular beam injection (SMBI) as an external particle source. The spatiotemporal evolution of edge density perturbation is traced and the particle source and the flux-gradient relation are obtained experimentally. The flux-gradient relation is found to be far from the diffusive model and three different transport processes are revealed, including pinch-dominant process, diffusion-pinch process and intermittent decays.

Keywords: Nuclear physics; Particle transport; Plasma; Plasma physics; Supersonic molecular beam injection; Tokamak.