A new flexible monochromator setup for quick scanning x-ray absorption spectroscopy

Stötzel, J.; Lützenkirchen-Hecht, D.; Frahm, R.
July 2010
Review of Scientific Instruments;Jul2010, Vol. 81 Issue 7, p073109
Academic Journal
A new monochromator setup for quick scanning x-ray absorption spectroscopy in the subsecond time regime is presented. Novel driving mechanics allow changing the energy range of the acquired spectra by remote control during data acquisition for the first time, thus dramatically increasing the flexibility and convenience of this method. Completely new experiments are feasible due to the fact that time resolution, edge energy, and energy range of the acquired spectra can be changed continuously within seconds without breaking the vacuum of the monochromator vessel and even without interrupting the measurements. The advanced mechanics are explained in detail and the performance is characterized with x-ray absorption spectra of pure metal foils. The energy scale was determined by a fast and accurate angular encoder system measuring the Bragg angle of the monochromator crystal with subarcsecond resolution. The Bragg angle range covered by the oscillating crystal can currently be changed from 0° to 3.0° within 20 s, while the mechanics are capable to move with frequencies of up to ca. 35 Hz, leading to ca. 14 ms/spectrum time resolution. A new software package allows performing programmed scan sequences, which enable the user to measure stepwise with alternating parameters in predefined time segments. Thus, e.g., switching between edges scanned with the same energy range is possible within one in situ experiment, while also the time resolution can be varied simultaneously. This progress makes the new system extremely user friendly and efficient to use for time resolved x-ray absorption spectroscopy at synchrotron radiation beamlines.


Related Articles

  • Construction of the multilayered-mirror monochromator beam line for the study of synchrotron... Mekaru, Harutaka; Tsusaka, Yoshiyuki; Miyamae, Takayuki; Kinoshita, Toyohiko; Urisu, Tsuneo; Masui, Shin; Toyota, Eijiro; Takenaka, Hisataka // Review of Scientific Instruments;Jun99, Vol. 70 Issue 6, p2601 

    Describes the construction of a multilayered-mirror monochromator beam line designed specially for synchrotron radiation stimulated process experiments. Criteria used in the design of the beam line; Performance of the monochromator.

  • Performance of a wideband multilayer polarizer for soft x rays. Yanagihara, Mihiro; Maehara, Takumi; Nomura, Hiroshi; Yamamoto, Masaki; Namioka, Takeshi; Kimura, Hiroaki // Review of Scientific Instruments;Jan1992, Vol. 63 Issue 1, p1516 

    Performance of a Ru/C multilayer polarizer of double-crystal x-ray monochromator type has been evaluated in the soft x-ray region using synchrotron radiation. The throughput efficiencies for s-polarized light were found to be 11.5% at 100 eV and higher than 4% over an energy range of 80-450 eV...

  • High resolution monochromatic tomography with x-ray sensing pickup tube. Hirano, Tatsumi; Usami, Katsuhisa; Sakamoto, Kozoo // Review of Scientific Instruments;Jul1989, Vol. 60 Issue 7, p2482 

    Using monochromatic synchrotron radiation and a high resolution x-ray sensing pickup tube as a two-dimensional detector, we have improved the spatial resolution of x-ray computed tomographic (CT) images. A quantitative elemental analysis was made based on the difference between two CT images...

  • Monochromator and beamline for a laboratory synchrotron (abstract). Tiit, V.; Kuznetsov, A. S.; Pill, K.; Vilt, E. // Review of Scientific Instruments;Jul1989, Vol. 60 Issue 7, p2132 

    In recent years, at the Institute of Physics of the Estonian Academy of Sciences, a laboratory pulsed synchrotron radiation source with the electron orbit radius of 6 cm and the light pulse duration of about 30 ms¹ has been devised. By now, a normal incidence vacuum monochromator operating in...

  • Fabricating rectangular internal cooling channels in silicon x-ray monochromator optics. Bilderback, D. H. // Review of Scientific Instruments;Jul1989, Vol. 60 Issue 7, p1977 

    Internally cooled monochromator crystals have been successfully fabricated and tested with synchrotron radiation. A single block of silicon was parted in the middle and grooves on a turn scale were cut into one hall The two blocks were then bonded back together with a silver-glass die attach...

  • Beamline for the characterization of radiation transfer standards ranging from 200 to 2000 eV. Thornagel, R.; Kühne, M. // Review of Scientific Instruments;Jul1989, Vol. 60 Issue 7, p1920 

    A novel soft x-ray beamline equipped with a specially designed Rowland circle monochromator has been installed at the laboratory of the Physikalisch-Technische Bundesanstalt (PTB) at the Berliner Elektronenspeicherring-Gesellschaft für Synchrotronstrahlung mbH (BESSY) for spectral radiant...

  • Monochromators and spectrographs using varied line spacing gratings. Underwood, James H. // AIP Conference Proceedings;2000, Vol. 521 Issue 1, p117 

    Varied line spacing (VLS) monochromators are now a standard part of the repertoire of synchrotron radiation. Four are installed at the ALS, one each at BESSY II and LURE, and at least ten in Japan. Many VLS spectrometers have also been constructed. VLS monochromators offer significant advantages...

  • Performance of the Dragon soft x-ray beamline (invited). Chen, C. T.; Sette, F. // Review of Scientific Instruments;Jul1989, Vol. 60 Issue 7, p1616 

    We report on the performance of a newly constructed synchrotron radiation soft x-ray beamline. This beamline, dubbed Dragon, is a spherical version of the cylindrical element monochromator design proposed previously. By measuring the K-edge absorption spectra of condensed nitrogen, it is...

  • A cryogenically cooled, sagittal focusing scanning monochromator for ESRF. Comin, Fabio // Review of Scientific Instruments;Feb1995, Vol. 66 Issue 2, p2082 

    Describes the design, construction, and testing of a double crystal monochromator for fast scans over large energy ranges at the European Synchrotron Radiation Facility in Grenoble, France. General architecture of the monochromator; Rotary feedthrough; Liquid nitrogen cooling loop; Operation...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics