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Existing Microbeam Facilities

This document discusses the capabilities and characteristics of microbeam facilities across major synchrotrons, including Spring-8, ESRF, APS, ALS, and CHESS. Attention is given to important parameters such as beam size on samples, divergence in vertical and horizontal directions, and photon intensity. The analysis emphasizes the significance of evaluating divergence, beam intensity, and the scattering process collectively. It highlights the advancements in microbeam x-ray analysis, with newly designed ring facilities featuring microspot beamlines, contributing to the growing significance of this research area.

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Existing Microbeam Facilities

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    1. Existing Microbeam Facilities I.C. Noyan IBM Research Division, Yorktown Heights. Dept. of Appl. Phys. & Appl. Math. Columbia University

    2. Microbeam facilities exist in all major synchrotrons. I will discuss the capabilities of: Spring-8 ESRF APS ALS CHESS

    3. Important Parameters Beam size on sample Not necessarily equal to the beam size at focus point. Divergence These terms may differ in vertical and horizontal directions. # of photons in beam (intensity) Divergence, beam intensity and the scattering process must be evaluated together. Only the photons within the acceptance aperture of the process are relevant.

    4. The data shown are either from the web pages or publications as of 1/2003. The URL for each institution is referenced once at the beginning of each section. Other data is referenced as required.

    42. Summary There are quite exciting machines that are doing microbeam x-ray analysis. This is a hot area: ESRF now reports microbeam results as a separate category. All have advantages and limitations. Ease of access, Multiple techniques with minimal set-up. New rings are being designed with microspot beamlines.

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