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Welcome to the Functional Materials Beamline (FMB) at MSN-C

The Functional Materials Beamline at CHESS, located at hutch ID3B, provides synchrotron-based x-ray scattering and imaging techniques to study manufacturing processes and properties of modern structural and functional materials. FMB delivers x-rays at four discrete energies ranging from 9.7 keV to 22 keV, making it especially suitable for the study of lightweight materials. Areas of interest include 3D printing of polymer composites and thin films. FMB's partner beamline, the Structural Materials Beamline (SMB), was built to operate at higher energies (40-200 keV) and focuses on higher density materials, especially metals.

A 3D Virtual tour of the MSN-C user area, including inside FMB and SMB, can be found here (screenshot shown above):

Beamline Description

FMB is fed by synchrotron radiation from a 1.5 m Chess Compact Undulator (CCU), which is then directed at a novel, custom-designed side-bounce monochromator system, consisting of four separate diamond single crystals. These crystals are prealigned to the (111), (220), (311), and (400) Bragg Peaks, with the result that each crystal selects a different energy at a fixed diffraction angle of 36°: 9.73, 15.9, 18.65, and 22.5 keV, respectively.

Inside the hutch, the upstream flight path, sample area, and detector table (pictured below) are treated as modular components, enabling a highly flexible configuration. Specifically:
  • The Upstream Flightpath (right) houses slits and ion chambers, and can switch between a Compound-Refractive-Lens (CRL) based setup for focused beam applications such as scan-probe SAXS/WAXS, and a standard setup with collimating and guard slits for bulk SAXS/WAXS or full-field imaging.
  • Sample Environments (middle): a flexible area that can be altered to accomdate various samples, sample degrees of freedom, and/or sample environments.
  • Downstream (left): Where the detectors are placed. Can be adjusted based on what is desired from the x-rays, defined by the experiment: Full-field, Small Angle X-ray Scattering (SAXS), Wide Angle X-ray Scattering (WAXS)

FMB Beamline.png

Image Collection Modes

FMB is optimized to gather spatially-resolved information about a sample on the micron-scale. Such information is used to create images. From an experimental point of view, there are two very different approaches to creating such images: Full-Field and Scan-Probe methods. Full-field images are collected in parallel, i.e. using a 2D detector placed downstream of the sample, and with a beam that simultaneously illuminates the whole field of view of an image. Such methods include traditional X-ray Radiography and phase-contrast imaging (PCI). In contrast to full-field tecniques, scan-probe images are created by sweeping a sample in 2D through a small or focused x-ray beam. In this case, the size of the x-ray beam determines the spatial resolution of the sample.

Full-Field and Scan-Probe techniques can differ substantially in terms of sample constraints, preparation, and especially in data anslysis. The pages linked below describe sample prep and analysis methods particular to each of these methods:
  • ScanProbe sample preparation for remote data collection
  • FullField data analysis examples

Fall 2020 operations

While we are planning for user experiments to be available for the upcoming run (fall 2020, cycle 2020-3), Cornell University is strongly discouraging and significantly restricting visits to campus by individuals not part of the residential Cornell community, at least through the fall semester. Therefore, out-of-town users will not be allowed to visit CHESS during the September to November experimental run. Out-of-town users will be supported via remote and mail-in capabilities. A limited number of challenging experiments will be supported in “joint venture mode”.

Users who are part of the residential Cornell community may be able to visit CHESS in person, but significant restrictions on building occupancy, beamline occupancy, and proximity between people are in place. Please do not come to Wilson Lab unless you have recieved confirmation that your visit is expected.

FMB User cheat sheet

Web Utilities
Topic revision: r26 - 11 Sep 2020, LouisaSmieska
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