Method of measurements with random perturbation: application in photoemission experiments.
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.
Fedin
D S
DS
Department of Mathematics and Mechanics, St. Petersburg State University, 198904 St. Petersburg, Russia.
Granichin
O N
ON
Dedkov
Yu S
YS
Molodtsov
S L
SL