Figure 4
From: Helical Phase Structure of Radiation from an Electron in Circular Motion
Interference between two undulator radiations. From the left column to the right: interference patterns between the fundamental and third harmonics and between the fundamental and second harmonics for left-handed polarisation, and between the fundamental and second harmonics and between the fundamental and third harmonics for right-handed polarisation. From the top row to the bottom, the raw CCD images, those with the analytic calculation results (red dotted lines) following Bahrdt et al.19 and the numerical simulation results by SRW25. The handedness is defined along the electron beam direction. The centres of the analytic results are fitted to the measurements.
