title: A numerical model for multiple detector energy dispersive X-ray spectroscopy in the transmission electron microscope.
abstract: Here we report a numerical approach to model a four quadrant energy dispersive X-ray spectrometer in the transmission electron microscope. The model includes detector geometries, specimen position and absorption, shadowing by the holder, and filtering by the Be carrier. We show that this comprehensive model accurately predicts absolute counts and intensity ratios as a function of specimen tilt and position. We directly compare the model to experimental results acquired with a FEI Super-X EDS four quadrant detector. The contribution from each detector to the sum is investigated. The program and source code can be downloaded from https://github.com/subangstrom/superAngle.
authors.affiliation: Department of Materials Science and Engineering, North Carolina State University, Raleigh, NC 27695, USA.
authors.forename: W
authors.initials: W
authors.lastname: Xu
authors.affiliation: Department of Materials Science and Engineering, North Carolina State University, Raleigh, NC 27695, USA.
authors.forename: J H
authors.initials: JH
authors.lastname: Dycus
authors.affiliation: Department of Materials Science and Engineering, North Carolina State University, Raleigh, NC 27695, USA.
authors.forename: X
authors.initials: X
authors.lastname: Sang
authors.affiliation: Department of Materials Science and Engineering, North Carolina State University, Raleigh, NC 27695, USA. Electronic address: jmlebeau@ncsu.edu.
authors.forename: J M
authors.initials: JM
authors.lastname: LeBeau
keywords: Detector collection angle; Energy dispersive X-ray spectroscopy (EDS); Shadowing; Spurious X-rays; Super-X; X-ray absorption correction