Total reflection of a flare-driven quasi-periodic extreme ultraviolet wave train at a coronal hole boundary

Context. A flare-driven quasi-periodic extreme ultraviolet wave train totally reflected at a coronal hole boundary was well imaged on both temporal and spatial scales by AIA/SDO. Aims. We aim to investigate the driving mechanisms of demonstrate total reflection effect boundary. Methods. The speeds incident trains are studied. periodic correlation with related flare is probed. compare measured incidence angle estimated critical angle. Results. find that periods about 100 s. excitation possibly due intermittent energy release in associated since its period similar pulsations flare. Our observational results show because angles satisfy theory reflection: smaller than