skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Extremum seeking x-ray position feedback using power line harmonic leakage as the perturbation

Abstract

Small x-ray beam sizes necessary for probing nanoscale phenomena require exquisite stability to prevent data corruption by noise. One source of instability at synchrotron radiation x-ray beamlines is the slow detuning of x-ray optics to marginal alignment where the onset of clipping increases the beam's susceptibility to higher frequency position oscillations. In this article, we show that a 1 mu m amplitude horizontal x-ray beam oscillation driven by power line harmonic leakage into the electron storage ring can be used as perturbation for horizontal position extremum seeking feedback. Feedback performance is characterized by convergence to 1.5% away from maximum intensity at optimal alignment.

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
National Institutes of Health (NIH)
OSTI Identifier:
1392125
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Accelerators and Beams; Journal Volume: 19; Journal Issue: 9
Country of Publication:
United States
Language:
English

Citation Formats

Zohar, S., Kissick, D. J., Venugopalan, N., Ogata, C. M., Makarov, O., Stepanov, S., and Fischetti, R. F.. Extremum seeking x-ray position feedback using power line harmonic leakage as the perturbation. United States: N. p., 2016. Web. doi:10.1103/PhysRevAccelBeams.19.092801.
Zohar, S., Kissick, D. J., Venugopalan, N., Ogata, C. M., Makarov, O., Stepanov, S., & Fischetti, R. F.. Extremum seeking x-ray position feedback using power line harmonic leakage as the perturbation. United States. doi:10.1103/PhysRevAccelBeams.19.092801.
Zohar, S., Kissick, D. J., Venugopalan, N., Ogata, C. M., Makarov, O., Stepanov, S., and Fischetti, R. F.. Thu . "Extremum seeking x-ray position feedback using power line harmonic leakage as the perturbation". United States. doi:10.1103/PhysRevAccelBeams.19.092801.
@article{osti_1392125,
title = {Extremum seeking x-ray position feedback using power line harmonic leakage as the perturbation},
author = {Zohar, S. and Kissick, D. J. and Venugopalan, N. and Ogata, C. M. and Makarov, O. and Stepanov, S. and Fischetti, R. F.},
abstractNote = {Small x-ray beam sizes necessary for probing nanoscale phenomena require exquisite stability to prevent data corruption by noise. One source of instability at synchrotron radiation x-ray beamlines is the slow detuning of x-ray optics to marginal alignment where the onset of clipping increases the beam's susceptibility to higher frequency position oscillations. In this article, we show that a 1 mu m amplitude horizontal x-ray beam oscillation driven by power line harmonic leakage into the electron storage ring can be used as perturbation for horizontal position extremum seeking feedback. Feedback performance is characterized by convergence to 1.5% away from maximum intensity at optimal alignment.},
doi = {10.1103/PhysRevAccelBeams.19.092801},
journal = {Physical Review Accelerators and Beams},
number = 9,
volume = 19,
place = {United States},
year = {Thu Sep 01 00:00:00 EDT 2016},
month = {Thu Sep 01 00:00:00 EDT 2016}
}