SXM Workshop - 5 October 2011
As part of the Diamond Phase III project, a scanning x-ray microscope will be installed on beamline I08 and will come into operation in 2015. The proposal for the SXM is now several years old and in this time there have been a number of advances in the field of x-ray microscopy. It is therefore appropriate that the scientific and technical case should be reviewed and updated.
Beamline I08 will provide a state of the art Scanning X-ray Microscope (SXM), in which a focused x-ray spot is scanned in raster fashion over the specimen. The central theme of the beamline is the ability to obtain morphological and chemically-specific information on a full range of materials (inorganic/organic) under real (wet, ‘dirty’) conditions, providing a facility that will be new to the UK. The SXM combines good spatial resolution in 2D with the capability to produce high quality spectroscopic (XANES) data for chemically-sensitive analysis, and x-ray fluorescence (XRF) mapping for trace-elemental analysis. It is intended to provide a combination of imaging modes that are not currently available elsewhere, and will give the instrument some unique capabilities.
- The highest resolution SXM imaging down to 20 nm of relatively thick (~10 – 20 μm) specimens using direct or k-space transmission imaging such as ptychography.
- A broad photon energy range of 250 - 3000 (4200) eV to cover a large number of K and L edges of low-Z elements during a single experiment.
- Fast acquisition soft X-ray imaging of specimen areas up to a mm or more.
- Functional specimen environments, with a cryogenic capability to allow imaging of radiation-sensitive samples.
- The high elemental and chemical sensitivity for low-Z elements, in combination with access to higher-Z elements using the same instrument, during the same beamtime.
The range of potential applications is large, including earth and environmental science and geochemistry (e.g., aerosols, minerals, sediments, soils and bio-remediation); chemistry (including new energy sources), biological, biotechnological and biomedical science; materials science (e.g. new biomaterials, polymers, magnetic and nano-structured materials) and scientific aspects of our cultural heritage (including archaeology and conservation issues).
The objective of this workshop is to describe the potential of the I08 SXM beamline to the UK user community and to define more clearly their requirements. At the end of the workshop, the UK user community as well as the working group should have a clear vision of the I08 SXM beamline and its scientific case and conceptual design. The workshop will be combined with an initial meeting of the members of the I08 User Working Group.
Diamond will pay for the reasonable travel expenses of attendees up to £100. Claims forms will be available at the meeting. The meeting will be initially limited to about 40 persons.