The measurement on radial profile of electrostatic Reynolds stress, plasma poloidal rotations, radial and poloidal electric field have been performed in the plasma boundary region of the HL-IM Tokamak using a multi-ar...The measurement on radial profile of electrostatic Reynolds stress, plasma poloidal rotations, radial and poloidal electric field have been performed in the plasma boundary region of the HL-IM Tokamak using a multi-array of Mach/Langmuir probes. In the experiments of Lower Hybrid Current Drive (LHCD), Supersonic Molecular Beam injection (SMBI), Multi-shot Pellet Injection (MPI) and Neutral Beam injection (NBI), the correlation between the Reynolds stress and poloidal flow in the edge plasma is presented. The results indicate that a sheared poloidal flow can be generated in Tokamak plasma due to radially varying Reynolds stress.展开更多
Acceleration of a dust particle in the SOL （scrape-off layer）/divertor plasma of HL- 2A with a single-null configuration is studied. A simplest model of the dust dynamics is applied, namely spherical shape of a dust...Acceleration of a dust particle in the SOL （scrape-off layer）/divertor plasma of HL- 2A with a single-null configuration is studied. A simplest model of the dust dynamics is applied, namely spherical shape of a dust, ion drag force due to Coulomb scattering as a dominant force, and spontaneous charging of a dust particle to the equilibrium charge. In the outer region near the plasma-facing wall the poloidal plasma flow pushes the dust particle to the divertor plates. It is clarified that the dust particle with a radius of 1 μm from the top of the SOL/divertor region is accelerated up to around 100 m/s at the divertor plates along the poloidal direction .展开更多
文摘The measurement on radial profile of electrostatic Reynolds stress, plasma poloidal rotations, radial and poloidal electric field have been performed in the plasma boundary region of the HL-IM Tokamak using a multi-array of Mach/Langmuir probes. In the experiments of Lower Hybrid Current Drive (LHCD), Supersonic Molecular Beam injection (SMBI), Multi-shot Pellet Injection (MPI) and Neutral Beam injection (NBI), the correlation between the Reynolds stress and poloidal flow in the edge plasma is presented. The results indicate that a sheared poloidal flow can be generated in Tokamak plasma due to radially varying Reynolds stress.
基金the JSPS-CAS Core-University Program in the field of Plasma and Nuclear Fusiona Grant-in-Aid for scientific research from Ministry of Education,Science and Culture of Japan (No.19055005)the program of the Formation of the International Joint Research Base Network in the National Institute for Fusion Science.
文摘Acceleration of a dust particle in the SOL （scrape-off layer）/divertor plasma of HL- 2A with a single-null configuration is studied. A simplest model of the dust dynamics is applied, namely spherical shape of a dust, ion drag force due to Coulomb scattering as a dominant force, and spontaneous charging of a dust particle to the equilibrium charge. In the outer region near the plasma-facing wall the poloidal plasma flow pushes the dust particle to the divertor plates. It is clarified that the dust particle with a radius of 1 μm from the top of the SOL/divertor region is accelerated up to around 100 m/s at the divertor plates along the poloidal direction .
