Application of reflective gratings for electron cyclotron heating system

This paper presents the application of reflective gratings as polarizers for electron cyclotron heating system in magnetic confinement fusion fields. Two methods, the integral method and the coordinate transformation method, are introduced for the grating design. Codes based on the two methods are developed. Numerical results of the integral method and the coordinate transformation method agree well with each other, indicating that codes are available. Additionally, a grating based on the codes is designed, manufactured and tested. The results also coincide well with the calculation results.