BL8-2

    Overview

    Beam line 8-2 can be used to probe a wide range of core levels using photoemission and x-ray absorption spectroscopies. It is equipped with a general-purpose end-station offering a high throughput setup for soft x-ray spectroscopy measurement. BL8-2 has been optimized for seamless sample positioning and the ability to measure across many different energies, consecutively, rendering it particularly useful for characterizing large numbers of samples with multiple elements such as energy storage materials or catalysts. To that end, sample sticks are available for mounting at the home institution, e.g., in a glove bag, and air-free transfer into the main chamber is the default procedure. Due to the standardization of sample labeling, positioning as well as the main spectroscopic acquisition into strictly formatted queues, most of the data collection can be scripted in advance, allowing for the highest possible degree of efficiency. Data acquisition and on-line monitoring takes place via remote access to a PC from where queues and quick plotting can take place. XAS and XPS can be combined in the same experiment.

    Source: Bending magnet, 4.0 mrad acceptance

    Status —

    Operational

    Beamline Parameters —

    Energy Range Resolution ΔE/E Spot Size Flux
    Focused 70 - 1300 eV ≥ 4 X 10-4 > 0.5 X 0.5 mm2 1 X 1010

    Optics —

    M0 Mirror M2 Mirror Monochromator
    Vertical focusing, toroidal, water-cooled Horizontal and vertical refocusing toroidal 6 m spherical grating monochromator

    Source —

    Bend Magnet

    Instrumentation —

    Spectroscopy endstation Photodiode for fluorescence yield (FY)
    Total electron yield (TEY)
    Hemispherical Photoemission Analyzer (Scienta)
    High throughput data acquisition
    Remote control via Teamviewer

    Sample Environment —

    Sample Temperature N/A - only room temperature
    Sample size < 15 x 15 mm2
    UHV 1x10-8 Torr during measurements, samples NEED to be UHV compatible)
    Air-free Sample stick transfer (dry N2, Ar available)


    SPEAR3

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