The Construction And Preliminary Experiment Of The Steady-mak KT-ST

The work is performed in the steady state plasma torus device of KT-ST in the University of Science and Technology of China, This thesis presents the construction of the magnetic confinement plasma device KT-ST and the preliminary experiments of plasma basic properties with steady state discharge.Firstly, we design the inner conductor torus in the center of the minor cross-section of the vacuum and the relevant auxiliary facilities, including an ion-free water device, power source providing power to the coils of toroidal and poloidal field, oil-free pumping system and the remote control system and so on. All devices were installed and tested on the site to be properly worked. KT-5D was named for KT-ST magnetic confinement device after upgrading. K means Keda, T means Tokamak-like Torus, ST means steadystate/stellarator and steady-mak.The accomplishment mentioned above made it maintains the magnetic surfaces configuration similar to tokamak, the adaptability and flexibility of the device are remarkably improved. It is beneficial to research of the physics issues in tokamak magnetic configuration.The set up of magnetic surfaces similar to tokamak with steady state plasma discharge was not reported yet elsewhere.Secondly, the preliminary research of plasma properties in the magnetic surfaces configuration steadystate discharge is completed based on above work.we simulated the magnetic line of poloidal field by using CST software and measured the radial profiles of poloidal magnetic field in horizontal and vertical direction,theoretical value and experimental data is very consistent,meanwhile the profile of safety factor in radial direction is given. Some basic parameters of plasma with electrostatic probes movable horizontally and vertically along radial directions of the minor cross section of the vacuum were measured. The profile of basic parameters of plasma such as plasma density,electron temperature,floating voltage were provided with different discharge conditions(gas pressure,toroidal field,poloidal field) in the thesis,and we give preliminary discussion and physical explanations. the preliminary experimental evidence of plasma poloidal rotation is also given.The camera was used to take pictures of the visible light emission of the plasma, the pictures of the exposure time of ten microseconds show plasma poloidal rotation is formed in magnetic surfaces configuration, which provides the support for the probe data.