title: Practical aspects of monochromators developed for transmission electron microscopy.
abstract: A few practical aspects of monochromators recently developed for transmission electron microscopy are briefly reviewed. The basic structures and properties of four monochromators, a single Wien filter monochromator, a double Wien filter monochromator, an omega-shaped electrostatic monochromator and an alpha-shaped magnetic monochromator, are outlined. The advantages and side effects of these monochromators in spectroscopy and imaging are pointed out. A few properties of the monochromators in imaging, such as spatial or angular chromaticity, are also discussed.
authors.affiliation: Electron Microscopy Group, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan kimoto.koji@nims.go.jp.
authors.forename: Koji
authors.initials: K
authors.lastname: Kimoto
keywords: EELS; STEM; TEM; energy resolution; monochromator; spatial resolution