Performance of a high-resolution x-ray microprobe at the Advanced Photon Source (original) (raw)
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Review of Scientific Instruments, 1996
Design of a Dedicated Beamline for X-ray Microfocusing-and Coherence-Based Techniques at the Advanced Photon Source Spatially resolved elemental analysis with submicron resolution and femtogram sensitivity may be routinely obtained. The spatial distribution of electronic or chemical states in a material system can be mapped using a x-ray spectromicroscope like the one developed for the soft x-ray region. Spatially resolved microdiffkaction can be applied to study structural variation in a sample, eg., strain distribution or crystallographic phase distribution.lJ Three dimensional tomography with submicron resolution similar t o that developed for the soft x-ray by a contrattor of the U. S. Government under contract No. W-31-104ENG-38.
Multiple micro mirrors for X-ray focusing and collimation
Optics Communications, 2006
A novel route for fabrication of compact optical system for X-rays is presented. It is based on the extensive use of tools developed for microelectronics and micromechanics: electron beam lithography, optical lithography and X-ray lithography. Virtually any shape can be obtained in order to match the system to the different needs. In this paper, we concentrate the attention on focusing system made by nested mirrors. A system for synchrotron radiation source and one for laboratory source have been designed and simulated by a raytracing code developed ad hoc. The main parameters and the fabrication tolerance errors have been evaluated. The first prototypes have been produced following different fabrication routes. They are presented here together with considerations for future developments.
The microXAS beamline at the swiss light source: Towards nano-scale imaging
Journal of Physics: Conference Series, 2009
The microXAS beamline is a dedicated hard X-ray microprobe facility allowing a combination of fluorescence, spectroscopy and diffraction techniques in an energy scale from 4 to 23 keV. This paper presents a short review of the beamline, including the recent developments towards nano-scale imaging.
High-flux hard X-ray microbeam using a single-bounce capillary with doubly focused undulator beam
Journal of Synchrotron Radiation, 2009
A pre-focused X-ray beam at 12 keV and 9 keV has been used to illuminate a single-bounce capillary in order to generate a high-flux X-ray microbeam. The BioCAT undulator X-ray beamline 18ID at the Advanced Photon Source was used to generate the pre-focused beam containing 1.2 Â 10 13 photons s À1 using a sagittal-focusing double-crystal monochromator and a bimorph mirror. The capillary entrance was aligned with the focal point of the pre-focused beam in order to accept the full flux of the undulator beam. Two alignment configurations were tested: (i) where the center of the capillary was aligned with the pre-focused beam ('in-line') and (ii) where one side of the capillary was aligned with the beam ('off-line'). The latter arrangement delivered more flux (3.3 Â 10 12 photons s À1 ) and smaller spot sizes ( 10 mm FWHM in both directions) for a photon flux density of 4.2 Â 10 10 photons s À1 mm À2 . The combination of the beamline main optics with a large-working-distance (approximately 24 mm) capillary used in this experiment makes it suitable for many microprobe fluorescence applications that require a micrometer-size X-ray beam and high flux density. These features are advantageous for biological samples, where typical metal concentrations are in the range of a few ng cm À2 . Micro-XANES experiments are also feasible using this combined optical arrangement.
Journal of Synchrotron Radiation, 2014
Synchrotron radiation from third-generation high-brilliance storage rings is an ideal source for X-ray microbeams. The aim of this paper is to describe a microfocusing scheme that combines both a toroidal mirror and Kirkpatrick–Baez (KB) mirrors for upgrading the existing optical system for inelastic X-ray scattering experiments at sector 3 of the Advanced Photon Source.SHADOWray-tracing simulations without considering slope errors of both the toroidal mirror and KB mirrors show that this combination can provide a beam size of 4.5 µm (H) × 0.6 µm (V) (FWHM) at the end of the existing D-station (66 m from the source) with use of full beam transmission of up to 59%, and a beam size of 3.7 µm (H) × 0.46 µm (V) (FWHM) at the front-end of the proposed E-station (68 m from the source) with a transmission of up to 52%. A beam size of about 5 µm (H) × 1 µm (V) can be obtained, which is close to the ideal case, by using high-quality mirrors (with slope errors of less than 0.5 µrad r.m.s.). C...
A microfocus X-ray fluorescence beamline at Indus-2 synchrotron radiation facility
Journal of Synchrotron Radiation, 2013
A microfocus X-ray fluorescence spectroscopy beamline (BL-16) at the Indian synchrotron radiation facility Indus-2 has been constructed with an experimental emphasis on environmental, archaeological, biomedical and material science applications involving heavy metal speciation and their localization. The beamline offers a combination of different analytical probes, e.g. X-ray fluorescence mapping, X-ray microspectroscopy and total-external-reflection fluorescence characterization. The beamline is installed on a bending-magnet source with a working X-ray energy range of 4-20 keV, enabling it to excite Kedges of all elements from S to Nb and Ledges from Ag to U. The optics of the beamline comprises of a double-crystal monochromator with Si(111) symmetric and asymmetric crystals and a pair of Kirkpatrick-Baez focusing mirrors. This paper describes the performance of the beamline and its capabilities with examples of measured results.
The Scanning X-Ray Microprobe at the Esrf "X-Ray Microscopy" Beamline
Surface Review and Letters, 2002
The development of high brilliance X-ray sources coupled with advances in manufacturing technologies of focusing optics has led to significant improvements in submicrometer probes for spectroscopy, diffraction and imaging applications. For instance, X-ray microscopy in the 1–10 keV energy range is better-suited for analyzing trace elements in fluorescence yield. This article will be biased towards submicron fluorescence microscopy developed on the ID21 beamline at the ESRF. The main technical developments, involving new focusing lenses or novel phase contrast method, are presented. Strengths and weaknesses of X-ray microscopy and spectromicroscopy techniques are discussed and illustrated by examples in biology, materials science and geology.
Large-distance refocusing of a submicrometre beam from an X-ray waveguide
Journal of Synchrotron Radiation, 2006
Among the several available X-ray optics for synchrotron radiation producing micrometre and submicrometre beams with high intensity, the X-ray waveguide (WG) can provide the smallest hard X-ray beam in one direction. A drawback of this optics is that, owing to the divergence at the exit, a nanometre-sized spot on the sample can only be obtained if this is within a few micrometres of the WG exit. Another limitation is that in planar WGs the beam is compressed in only one direction. Here, using a dynamically bent elliptical Si/Pt mirror, the guided X-ray beam has been refocused at $ 1 m from the waveguide exit. The large working distance between the device and the submicrometre focus leaves some space for sample environment (vacuum chamber, furnace, cryostat, magnets, high-pressure device etc.) and allows cross-coupled geometries with two WGs for efficient compression in two directions.
The BESSY X-ray microfocus beamline project
Spectrochimica Acta Part B Atomic Spectroscopy
The design and construction of a beamline dedicated to X-ray absorption spectroscopy, X-ray fluorescence analysis, X-ray diffraction and X-ray small-angle scattering measurements with micron and submicron spatial resolution in the photon energy range of 1.9-30 keV are reported here. The main feature of the beamline is a combination of all these methods in one experimental station. The source will be a BESSY 7-T wavelength shifter, which is already in operation. Such a wavelength shifter with its continuous spectrum is an optimum source for these experiments. Glass capillaries and the combination of a linear Bragg-Fresnel lens and bimorph mirror were chosen as the special optical components in the beamline. This beamline will open for BESSY users the possibility to perform experiments on the same sample applying a microfocused X-ray beam in combination with advanced experimental methods.