Search for channeling effects in a polycrystal

Channeling phenomena have been studied extensively to date using mainly single crystals as a target. The purpose of the present study is to search for channeling effects in a polycrystal. Profiles of a 255 MeV electron beam transmitted through a 10 μm thick molybdenum polycrystalline foil were measured and channeling effects were successfully identified as enhancement of the beam sizes. The observed results can be explained in terms of the texture in the polycrystalline foil. Applications of channeling in a textured polycrystal to beam manipulation techniques and radiation sources are also discussed.