Bulletin of the American Physical Society
New England Section Fall 2023 Meeting
Friday–Saturday, October 20–21, 2023; University of Rhode Island, Kingston, Rhode Island
Session H01: Poster Session
9:40 AM,
Saturday, October 21, 2023
University of Rhode Island
Room: Engineering Fascitelli Center Hallway
Abstract: H01.00009 : A Tool for Evaluating Systematic Errors in Transmission-Mode X-ray Absorption Fine Structure due to Sample Preparation
Presenter:
David Cusick
(Massachusetts Institute of Technology)
Author:
David Cusick
(Massachusetts Institute of Technology)
local electronic and atomic structure. Several decades of effort have led to strong theoretical
modeling supported by community-standard tools for processing data and fitting to theory.
However, XAFS measurements themselves require care in sample preparation. We present here
the ERIS software package, with the goal of allowing easy estimates of the relationship between
sample preparation and the magnitude of resulting systematic errors when performing
transmission-mode XAFS. ERIS allows the user to load raw data with incident flux I0 and
transmitted flux IT and then evaluate the independent or combined effects of the two dominant
sample-preparation specific sources of systematic error: (1) the effects of sample thickness
combines with monochromator response function, and (2) the consequences of pinholes or other
sample irregularities. ERIS will help the XAFS community both by helping design more reliable
experiments and also by providing quantitative bounds for possible systematic errors.
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