The Simulation And Experiments Study For CXRS And BES Diagnostic Systems In HL-2A Tokamak

The development of new energy is an important way to solve the current energy crisis.Fusion becomes a research hotspot for high energy output,small pollution,high safety.In the past few decades,the use of magnetic confinement fusion tokamak devices,a method of achieving nuclear fusion,has gradually become one of the major research focuses for fusion energy researchers and made a great progress.However,there are still many practical problems to be considered,such as the design of the filter,the technology of superconducting magnets,the improvement of the negative ion driving source,and so on.Therefore,it is necessary to carry out simulation and experimental research on Tokamak device,where to do further control feedback and physical research.Because the occurrence of fusion in the device is realized in plasma,it is of great significance for the improvement of magnetic confinement fusion device and the solution of fusion technology through the diagnosis of various parameters of the plasma.The CXRS(Charge eXchange Recombination Spectroscopy)and BES(Beam Emission Spectroscopy)are common and effective diagnostic methods in the magnetic confinement tokamak.At present,CXRS is mainly used to measure the ionic temperature,rotation speed,and impurity ion density of the plasma in the Tokamak device.And BES can be used to measure important parameters such as the energy ratio of the neutral beam,the magnetic field distribution of the plasma,etc.Besides,BES can also be used to study the fluctuations of plasma density,ionic and electronic temperature.Based on the HL-2A tokamak device,which is located at Southwestern Institute of Physics(SWIP),this article performs component fitting processing on the spectral information collected by the BES and CXRS diagnostic systems on the device and then to accurately separate the spectral components via the relevant principles.According to the fitting results,some of important parameters in Tokamak devices were calculated successfully,such as neutral beam energy ratio,safety factor radial distribution,ion temperature,and rotation speed.In addition,combine of the experiment conditions,the spectrum of the CXRS and BES are simulated and the relevant parameters are calculated.According to comparison between simulations and experiments,it can be proved the accuracy of the simulation because the simulation results are basically consistent with the experimental results.The simulation program can be used to predict the performance of Tokamak.And the simulation results have important referential value for the optimization and upgrading of Tokamak devices.