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26 August 2015 Development of polycapillary x-ray optics for synchrotron spectroscopy
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Abstract
A new spectrometer design that will result in a highly efficient, easy to handle, low-cost, high-resolution spectroscopy system with excellent background suppression is being developed for the NSLS-II Inner-Shell Spectroscopy beamline. This system utilizes non-diffractive optics comprised of fused and directed glass capillary tubes that will be used to collect and pre-collimate fluorescence photons. There are several advantages enabled by this design; a large energy range is accessible without modifying the s-stem, a large collection angle is achieved per detection unit: 4-5% of the full solid angle, easy integration in complex and harsh environments is enabled due to the use of a pre-collimation system as a secondary source for the spectrometer, and background from a complex sample environment can be easily and efficiently suppressed.

The polycapillary X-ray focusing optics segment of this application has been under development. This includes improvement in manufacturing methods of polycapillary structure for x-ray optics, forming the polycapillary structure to produce X-ray optics to achieve the required solid angle collection and transmission efficiency, and measurement of X-ray focusing properties of the optics using an X-ray source. Two promising advances are large open area ratios of 80% or more, and the possibility of adding coatings in the capillaries using Atomic Layer Deposition techniques to improve reflection efficiency.
© (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Mark A. Popecki, Daniel Bennis, Bernhard Adams, Aileen O'Mahony, Christopher A. Craven, Michael R. Foley, Michael J. Minot, Joseph M. Renaud, Justin L. Bond, Michael E. Stochaj, Klaus Attenkofer, and Eli Stavitski "Development of polycapillary x-ray optics for synchrotron spectroscopy", Proc. SPIE 9588, Advances in X-Ray/EUV Optics and Components X, 95880D (26 August 2015); https://doi.org/10.1117/12.2188687
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