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 TOOLS & INSTRUMENTS

Large Area Rapid Imaging Analytical Tool (LARIAT II)
    
  View of the Large Area Rapid Imaging Tool Mark II (LARIAT II) before installation at the National Synchrotron Light Source II.View of the Large Area Rapid Imaging Tool Mark II (LARIAT II) before installation at the National Synchrotron Light Source II.
  
      In contrast to scanning transmission X-ray microscopy (STXM), the Large Area Rapid Imaging Tool provides full field imaging capabilities over a relatively large area (20 x 20 mm) with soft X-ray energies (0.1 keV to 2.2 keV). With the installation of a superconducting magnet, the LARIAT mark II (LARIAT II) provides significant improvements over the mark I at better than 5 μm spatial resolution. This is primarily achieved through the increased magnetic field (9 Tesla vs. 0.95 Tesla) to shuttle photoelectrons emitted from the sample upon excitation by a monochromatic, tunable X-ray beam. The tunability of the beam supports the scanning of adsorption edges of low Z elements. As a result, the image is hyperspectral, providing a spatially resolved array of chemical, electronic, and physical structure information. In addition, direct control of the elliptically polarized undulator that feeds the beamline provides dichroic image acquisition to reveal molecular bond orientation as yet another dimension of the data field. The LARIAT has been designed with a large effective numerical aperture with minimal optical aberration. The mark I also features electrostatic and magnetostatic electron optical elements to discriminate energy and depth of the secondary electron distribution. The result is a nearly 100% efficiency in transmission of electrons through the optics to the imaging detector. The LARIAT is first of its kind and continues as a focus of development for the NIST Synchrotron Science Group.

The LARIAT project, which has developed both the mark I and mark II microscopes, has been achieved through funding of a NIST Small Business Innovation Research Grant, now in phase III, to Synchrotron Research, Inc.
              Usage Information
        
Operating Schedule
                                The LARIAT II is in the commissioning phase, with user operations anticipated in 2019.

Access Information
                                The LARIAT II is in the commissioning phase, with user operations anticipated in 2019.
              Materials
  
            Organizations
      
      NIST HeadquartersLaboratory ProgramsMaterial Measurement LaboratoryMaterials Measurement Science DivisionSynchrotron Science Group
              Details
          Campus
                    Brookhaven National Laboratory
              Contact
      
        

Cherno Jaye
    
      
  cherno.jaye@nist.gov
  (631) 344-5958

  Daniel A Fischer
    
      
  daniel.fischer@nist.gov
  (631) 344-5177

      Ed Principe, President
  eprincipe@synchres.com
  (321) 213-8654
  Synchrotron Research, Inc
                      Related Projects
      
                  Synchrotron X-ray Spectroscopic Imaging

    
    Created February 14, 2019, Updated November 15, 2019
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