Study on the Full Electromagnetic Model of Collective Thomson Scattering in Magnetic Confinement Fusion

ObjectivesCollective Thomson scattering (CTS) is one of the few fusion diagnostic technologies that can provide fast ion kinetic property measurement in the center of fusion devices. However, the physical models that CTS diagnosis relies on at home and abroad currently have problems such as lack of electromagnetic effects and inaccurate plasma dielectric properties, which hinders the development of CTS diagnostic theory. Therefore, it is urgent to develop a more comprehensive CTS physical model code to support the development of CTS diagnosis.MethodsThe establishment and derivation of the full electromagnetic model is introduced, and the similarities and differences between the full electromagnetic model and the electrostatic model are analysed. The spectrum characteristics of the full electromagnetic model CTS under different parameters are studied based on the HL-2A device.ResultsThe full electromagnetic model is consistent with the electrostatic model results in conventional diagnosis. In addition, the full electromagnetic model has obvious advantages in diagnosing structures such as ion-Bernstein waves. The full electromagnetic model is used to optimize the system parameters for the CTS system of the HL-2A device.ConclusionsIn CTS spectrum research, the full electromagnetic model has more complete functions and huge potential, and can provide a powerful tool for CTS diagnosis of physical quantities such as ion ratios. In the future, based on more devices at home and abroad, the full electromagnetic model will have broader application prospects.