NEXAFS microscopy and resonant scattering: Composition and orientation probed in real and reciprocal space

http://xrm.phys.northwestern.edu/research/pdf_papers/2004/lerotic_ultramic_2004.pdf

Cluster analysis of soft X-ray spectromicroscopy data.

Synthetic Coprecipitates of Exopolysaccharides and Ferrihydrite. Part I: Characterization

Comparison of NEXAFS microscopy and TEM-EELS for studies of soft matter.

http://xrm.phys.northwestern.edu/research/pdf_papers/2005/lerotic_jesrp_2005.pdf

Cluster analysis in soft X-ray spectromicroscopy : Finding the patterns in complex specimens

Scanning transmission x-ray microscopes (STXM) are well matched to the optics of high resolution monochromators, offer a variety of imaging modes and can minimize radiation damage to the specimen. We describe the Stony Brook STXM at the NSLS. This microscope is used for a variety of studies by many users; we briefly outline its use for studies of hydrated colloidal system and for dark field microscopy on immunogold labeled specimens as examples. In order to keep pace with developments in zone plate optics, spectroscopy and a variety of imaging modalities, the microscope is being redesigned and its characteristics are discussed. Its preliminary x-ray detector will be a new multiware proportional counter with high count rate capability.© (1998) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

Applications and instrumentation advances with the Stony Brook scanning transmission x-ray microscope

Driven by the requirements of new x-ray microscopy instrumentation the Stony Brook microscopy beamline X-1A has undergone considerable evolution [1]. The room temperature scanning transmission X-ray microscope (STXM) has been completely redesigned improving performance, case of use and compatibility with other experiments. We present the highlights of the new design, the available detectors and the result of early tests of this new microscope.

/pdf/instrumentation-advances-and-detector-development-with-the-4wic3t4byb.pdf

Instrumentation advances and detector development with the Stony Brook scanning transmission X-ray microscope

Unlike transmission X-ray microscopy, scanning transmission X-ray microscopy (STXM), till now, does not allow phase contrast. Several method have been suggested but no proof of practical feasibility has been yet given. Here we analyze the methods based on the detection of the small beam deflection induced by the object phase gradient, by a segmented detector. It is shown that structuring the zone plate illumination potentially improves the detection. A diffractive beam profiler has been constructed to condition the beam of the NSLS X1A STXM. Recent images are shown, which, compared to numerical simulations, indicate the presence of phase contrast.

/pdf/demonstration-of-phase-contrast-in-scanning-transmission-x-2r0e7okpq2.pdf

Mary Carlucci-Dayton

Papers

Applications and instrumentation advances with the Stony Brook scanning transmission x-ray microscope

Instrumentation advances and detector development with the Stony Brook scanning transmission X-ray microscope

Demonstration of phase contrast in scanning transmission X-ray microscopy: Comparison of images obtained at NSLS X1-A with numerical simulations