The SLcam: A full-field energy dispersive X-ray camera

The color X-ray camera (SLcam) is a full-field single photon imager. As stand-alone camera, it is applicable for energy and space-resolved X-ray detection measurements. The exchangeable poly-capillary optics in front of a beryllium entrance window conducts X-ray photons from the probe to distinguish...

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Bibliographic Details
Published in:arXiv.org 2012-10
Main Authors: Bjeoumikhov, A, Buzanich, G, Langhoff, N, Ordavo, I, Radtke, M, Reinholz, U, Riesemeier, H, Scharf, O, Soltau, H, Wedell, R
Format: Article
Language:English
Subjects:
Beryllium
Cameras
Capillary optics
Dispersion
Photons
Pixels
Sharpness
X ray imagery
X-ray fluorescence
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Summary:The color X-ray camera (SLcam) is a full-field single photon imager. As stand-alone camera, it is applicable for energy and space-resolved X-ray detection measurements. The exchangeable poly-capillary optics in front of a beryllium entrance window conducts X-ray photons from the probe to distinguished energy dispersive pixels on a pnCCD. The dedicated software enables the acquisition and the online processing of the spectral data for all 69696 pixels, leading to a real-time visualization of the element distribution in a sample. No scanning system is employed. A first elemental composition image of the sample is visible within minutes while statistics is improving in the course of time. Straight poly-capillary optics allows for 1:1 imaging with a space resolution of 50 um and no limited depth of sharpness, ideal to map uneven objects. Using conically shaped optics, a magnification of 6 times was achieved with a space resolution of 10 um. We present a measurement with a laboratory source showing the camera capability to perform fast full-field X-ray Fluorescence (FF-XRF) imaging with an easy, portable and modular setup.
ISSN:2331-8422
DOI:10.48550/arxiv.1210.4344