Time: Friday, Nov. 13, 10:00 am
Venue: Rm. 413, Bld. 11#, Yuquan Campus
Speaker: 王驰宇
Title: Observations of The Turbulence Transfer Phenomenon With Different Magnetic Field on ZPED
Abstract: A turbulence transfer phenomenon has been observed on Zheda Plasma Experiment Device (ZPED) with different magnetic field. We focused on the analysis of density profile, poloidal rotation velocity and radially resolved floating potential frequency spectrum to explore the physics progress of the turbulence transfer phenomenon between the low-frequency turbulence and the high-frequency turbulence at the position ρ=0.29 in ZPED. Experimental results, a stiff density profile, a reversal poloidal rotation velocity and a transition phenomenon of different turbulence types, indicates that a critical magnetic field (Bcrit) point exists to exactly differentiate the turbulence transfer phenomenon observed. The critical point of the magnetic field is also related to the inflection point of the density gradient length and temperature gradient length. This is helpful to understand the principle physics of the coupling/decoupling of the particle transport and the energy transport in the magnetic plasmas.