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A plastic miniature x-ray emission spectrometer based on the cylindrical von Hamos geometry

2012; American Institute of Physics; Volume: 83; Issue: 2 Linguagem: Inglês

10.1063/1.3680598

1527-2400

B. Mattern, Gerald T. Seidler, Matthew Haave, Joseph I. Pacold, R. A. Gordon, J. Planillo, J. P. Quintana, B. Rusthoven,

Analytical chemistry methods development

We present a short working distance miniature x-ray emission spectrometer (miniXES) based on the cylindrical von Hamos geometry. We describe the general design principles for the spectrometer and detail a specific implementation that covers Kβ and valence level emission from Fe. Large spatial and angular access to the sample region provides compatibility with environmental chambers, microprobe, and pump/probe measurements. The primary spectrometer structure and optic is plastic, printed using a 3-dimensional rapid-prototype machine. The spectrometer is inexpensive to construct and is portable; it can be quickly set up at any focused beamline with a tunable narrow bandwidth monochromator. The sample clearance is over 27 mm, providing compatibility with a variety of environment chambers. An overview is also given of the calibration and data processing procedures, which are implemented by a multiplatform user-friendly software package. Finally, representative measurements are presented. Background levels are below the level of the Kβ2, 5 valence emission, the weakest diagram line in the system, and photometric analysis of count rates finds that the instrument is performing at the theoretical limit.