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

Title: Fast helicity switching of x-ray circular polarization at beamline P09 at PETRA III

Abstract

At the resonant scattering and diffraction beamline P09 at PETRA III/DESY, polarization manipulation in the X-ray energy range 3-13 keV is possible using wave-plates. Recently, fast flipping of circular polarization helicity using the Raspberry Pi controlled FPGA (PiLC) device developed at DESY and dedicated piezo-electric flippers has been commissioned. Functionality of the PiLC for XMCD and first XMCD measurements at the Fe K-and Dy-L{sub 3} absorption edges are presented.

Authors:
; ; ; ; ;  [1];  [2];  [3]
  1. Deutsches Elektronen Synchrotron (DESY), Notkestrasse 85, 22603 Hamburg (Germany)
  2. XMaS, ESRF, 6 rue Jules Horowitz, BP220, Grenoble 38043 (France)
  3. (United Kingdom)
Publication Date:
OSTI Identifier:
22608353
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1741; Journal Issue: 1; Conference: SRI2015: 12. international conference on synchrotron radiation instrumentation, New York, NY (United States), 6-10 Jul 2015; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ABSORPTION; DESY; DIFFRACTION; HELICITY; MAGNETIC CIRCULAR DICHROISM; POLARIZATION; RESONANCE SCATTERING; X RADIATION

Citation Formats

Strempfer, J., E-mail: Joerg.Strempfer@desy.de, Mardegan, J. R. L., Francoual, S., Veiga, L. S. I., Spitzbart, T., Zink, H., Bouchenoire, L., and Department of Physics, University of Liverpool, Liverpool, L69 7ZE. Fast helicity switching of x-ray circular polarization at beamline P09 at PETRA III. United States: N. p., 2016. Web. doi:10.1063/1.4952840.
Strempfer, J., E-mail: Joerg.Strempfer@desy.de, Mardegan, J. R. L., Francoual, S., Veiga, L. S. I., Spitzbart, T., Zink, H., Bouchenoire, L., & Department of Physics, University of Liverpool, Liverpool, L69 7ZE. Fast helicity switching of x-ray circular polarization at beamline P09 at PETRA III. United States. doi:10.1063/1.4952840.
Strempfer, J., E-mail: Joerg.Strempfer@desy.de, Mardegan, J. R. L., Francoual, S., Veiga, L. S. I., Spitzbart, T., Zink, H., Bouchenoire, L., and Department of Physics, University of Liverpool, Liverpool, L69 7ZE. Wed . "Fast helicity switching of x-ray circular polarization at beamline P09 at PETRA III". United States. doi:10.1063/1.4952840.
@article{osti_22608353,
title = {Fast helicity switching of x-ray circular polarization at beamline P09 at PETRA III},
author = {Strempfer, J., E-mail: Joerg.Strempfer@desy.de and Mardegan, J. R. L. and Francoual, S. and Veiga, L. S. I. and Spitzbart, T. and Zink, H. and Bouchenoire, L. and Department of Physics, University of Liverpool, Liverpool, L69 7ZE},
abstractNote = {At the resonant scattering and diffraction beamline P09 at PETRA III/DESY, polarization manipulation in the X-ray energy range 3-13 keV is possible using wave-plates. Recently, fast flipping of circular polarization helicity using the Raspberry Pi controlled FPGA (PiLC) device developed at DESY and dedicated piezo-electric flippers has been commissioned. Functionality of the PiLC for XMCD and first XMCD measurements at the Fe K-and Dy-L{sub 3} absorption edges are presented.},
doi = {10.1063/1.4952840},
journal = {AIP Conference Proceedings},
number = 1,
volume = 1741,
place = {United States},
year = {Wed Jul 27 00:00:00 EDT 2016},
month = {Wed Jul 27 00:00:00 EDT 2016}
}
  • We describe the new experimental possibilities of the micro- and nanofocus X-ray scattering beamline P03 of the synchrotron source PETRA III at DESY, Hamburg (Germany), which arise from experiments with smaller beam sizes in the micrometer range. This beamline has been upgraded recently to perform new kinds of experiments. The use of an intermediate focus allows for reducing the beam size of microfocused hard X-rays while preserving a large working distance between the focusing elements and the focus position. For the first time, this well-known methodology has been employed to grazing incidence small- and wide-angle X-ray scattering (GISAXS/GIWAXS). As examples,more » we highlight the applications to in situ studies using microfluidic devices in GISAXS geometry as well as the investigation of the crystallinity of thin films in GIWAXS geometry.« less
  • We present a scanning transmission x-ray microscope (STXM) built on top of our existing modular platform for high resolution imaging experiments. This platform consists of up to three separate vacuum chambers and custom designed piezo stages. These piezo stages are able to move precisely in x-, y- and z-direction, this makes it possible to adjust the components for different imaging modes. During recent experiments the endstation was operated mainly as a transmission x-ray microscope (TXM) [1, 2].
  • We report about the development and implementation of a new setup for time-resolved X-ray absorption fine structure spectroscopy at beamline P11 utilizing the outstanding source properties of the low-emittance PETRA III synchrotron storage ring in Hamburg. Using a high intensity micrometer-sized X-ray beam in combination with two positional feedback systems, measurements were performed on the transition metal complex fac-Tris[2-phenylpyridinato-C2,N]iridium(III) also referred to as fac-Ir(ppy){sub 3}. This compound is a representative of the phosphorescent iridium(III) complexes, which play an important role in organic light emitting diode (OLED) technology. The experiment could directly prove the anticipated photoinduced charge transfer reaction. Our resultsmore » further reveal that the temporal resolution of the experiment is limited by the PETRA III X-ray bunch length of ∼103 ps full width at half maximum (FWHM).« less
  • The hard x-ray scanning microscope at beamline P06 of PETRA III at DESY in Hamburg serves a large user community, from physics, chemistry, and nanotechnology to the bio-medical, materials, environmental, and geosciences. It has been in user operation since 2012, and is mainly based on nanofocusing refractive x-ray lenses. Using refractive optics, nearly gaussian-limited nanobeams in the range from 50 to 100 nm can be generated in the hard x-ray energy range from 8 to 30 keV. The degree of coherence can be traded off against the flux in the nanobeam by a two-stage focusing scheme. We give a briefmore » overview on published results from this instrument and describe its most important components and parameters.« less
  • A measurement system for circular dichroism (CD) of soft X-ray absorption has been developed using helicity switching of circularly polarized radiation by twin helical undulators at BL25SU of SPring-8. Difference of horizontal spot positions between the negative- and positive-helicity light at the sample position is within {+-}3{mu}m. Measurement time for magnetic circular dichroism (MCD) of core absorption is shortened to less than 1/3 in comparison with an existing system of magnetic field switching, keeping the same data quality.