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Updated: Jul 6, 2026

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
Published on: June 28, 2018
Method of measurements with random perturbation: application in photoemission experiments
D S Fedin1, O N Granichin, Yu S Dedkov
1Department of Mathematics and Mechanics, St. Petersburg State University, 198904 St. Petersburg, Russia.
Abstract:
We report on an application of a simultaneous perturbation stochastic approximation (SPSA) algorithm to filtering systematic noise (SN) with nonzero mean value in photoemission data. In our analysis, we have used a series of 50 single-scan photoemission spectra of W(110) surface where different SNs were added. It was found that the SPSA-evaluated spectrum is in good agreement with the spectrum measured without SN. On the basis of our results, a wide application of SPSA algorithm for evaluation of experimental data is anticipated.
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