Dmytro Konakhovych (1), Damian Sniezek (1), Oskar Warmusz (1), Dylan S. Black (2), Zhexin Zhao (2), R. Joel England (3), Andrzej Szczepkowicz (1) ((1) University of Wroclaw, (2) Stanford University, (3) SLAC National Accelerator Laboratory)
We consider radiation generated by an electron travelling parallel to a planar rectangular silicon grating: Smith-Purcell radiation to the vacuum side, internal Smith-Purcell radiation into the dielectric, and Cherenkov radiation into the dielectric. Internal Smith-Purcell radiation dominates over the other two radiation mechanisms in the range where conventional Smith-Purcell radiation is forbidden. This observation may lead to improved design of contactless particle beam monitors.
Comments: 5 pages, 5 figures