skip to main content

SciTech ConnectSciTech Connect

Title: Effects, determination, and correction of count rate nonlinearity in multi-channel analog electron detectors

Detector counting rate nonlinearity, though a known problem, is commonly ignored in the analysis of angle resolved photoemission spectroscopy where modern multichannel electron detection schemes using analog intensity scales are used. We focus on a nearly ubiquitous “inverse saturation” nonlinearity that makes the spectra falsely sharp and beautiful. These artificially enhanced spectra limit accurate quantitative analysis of the data, leading to mistaken spectral weights, Fermi energies, and peak widths. We present a method to rapidly detect and correct for this nonlinearity. This algorithm could be applicable for a wide range of nonlinear systems, beyond photoemission spectroscopy.
Authors:
; ; ;  [1]
  1. Department of Physics, University of Colorado, Boulder, Colorado 80309-0390 (United States)
Publication Date:
OSTI Identifier:
22254912
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 85; Journal Issue: 4; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ALGORITHMS; CORRECTIONS; COUNTING RATES; ELECTRON DETECTION; ELECTRON SPECTROSCOPY; NONLINEAR PROBLEMS; PHOTOEMISSION; SPECTRA