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https://www.nist.gov/laboratories/tools-instruments/polarized-resonant-soft-x-ray-scattering-p-rsoxs

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TOOLS & INSTRUMENTS

# Polarized Resonant Soft X-ray Scattering (P-RSoXS)

Built with a collaboration with the RSoXS project in the NIST Materials Science and Engineering Division, polarized resonant soft X-ray scattering (P-RSoXS) is an emerging powerhouse characterization of soft materials. RSoXS characterizes spatial correlations in atomic density and molecular chemistry with a contrast mechanism based on both electron density and molecular orbital resonances. In addition to the traditional modes of RSoXS, this station includes a polarized beam to provide a unique capability to measure spatial correlations of molecular orientation. Using a tunable photon energy and polarization from the NSLS-II synchrotron insertion device, contrast can be varied in a manner similar to isotopic deuteration effects available in neutron techniques. As with many soft X-ray techniques, the sample form is often similar to transmission electron microscopy formats, namely a thin sample mounted on a transparent grid or window, although grazing incidence is also under development. To take advantage of that similarity, the NIST RSoXS instrument is fitted with a sample load lock system compatible with some transmission electron microscopy platforms, allowing users to move samples between real space and inverse space imaging without remounting. Sample environments that allow for gaseous and fluid environments are being deployed.

**For more information on recent progress in RSoXS:**
                    - project page supporting the development of RSoXS at NIST.
                    - Publication:"Resonant soft X‐ray scattering in polymer science":  10.1002/pol.20210414
                    - Publication: "A NIST facility for resonant soft x-ray scattering measuring nano-scale soft matter structure at NSLS-II": 10.1088/1361-648X/abdffb

## Specifications/Capabilities

**Energy Range:** 0.1 keV to 2.2 keV**Insertion Device:** Elliptical Polarized Undulator (EPU)**Spot Size:** 50-500 μm square**Modes of Measurement:** linearly or circularly polarized Resonant Soft X-ray Scattering, X-ray Absorption in total electron yeild or transmission modes**Detection System:** 4k x 4k in-vacuum CCD 60mm square**Data Analysis:** NSLS-III Bluesky and Databroker python packages, as well as custom Igor Pro procedures

## Usage Information

### Access Information

P-RSoXS is operating and available through general user proposals (through BNL user program) or through collaboration with NIST staff.

MaterialsMaterials characterizationComposition and structurePolymers

## Organizations

                          - NIST Headquarters
                            - Laboratory Programs
                              - Material Measurement Laboratory
                                - Materials Measurement Science Division
                                  - Synchrotron Science Group

## Details

## Facility

## Contact

                    -  Eliot Gann  eliot.gann@nist.gov      (631) 344-4225   
                    -  Dean DeLongchamp  dean.delongchamp@nist.gov      (301) 975-5599   
                    -  Daniel A Fischer  daniel.fischer@nist.gov      (631) 344-5177   

## Related Tools & Instruments

Near Edge X-ray Absorption Fine Structure (NEXAFS)

Large Area Rapid Imaging Analytical Tool (LARIAT II)

## Related Projects

Resonant Soft X-ray Scattering (RSoXS)

Synchrotron Resonant Scattering and Diffraction

### HEADQUARTERS

301-975-2000

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