Core plasma density fluctuation measurement in low hybrid drive experiment in HT-7 tokamak

摘要

Understanding the mechanism of plasma transport in tokamaks is one of the great challenges of fusion research. Indeed, since most explanations of his phenomenon are based on some type of plasma turbulence, particularly difficult problem to explain the transport of electron energy, since in tokamak reactor a large fraction of the energy of charged fusion products-necessary to sustain the nuclear fusion reactions-would be released directly to the electrons. Both theory and experiments suggest that a short-scale turbulence was considered as the cause of the anomalous electron transport in tokamak[1,2]. Magnetic shear is thought to be important because it can stabilize some short-scale turbulence such as trapped electron modes, a candidate to explain the observed anomalous electron transport in tokamak.[3]