IfG Institute for Scientific Instruments GmbH

Berlin, Germany

IfG Institute for Scientific Instruments GmbH

Berlin, Germany
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Agency: European Commission | Branch: FP7 | Program: MC-ITN | Phase: FP7-PEOPLE-2012-ITN | Award Amount: 3.54M | Year: 2013

SPRITE is a multi-disciplinary European training network which brings together Europes premier research institutes in technology and applications of ion beams. Those involved are already actively collaborating, for example in the recently very favourably reviewed EC Infrastructure project SPIRIT. SPRITE addresses the urgent European need - identified in a recent Foresight Review - to train the next generation of researchers in this multi- and supra- disciplinary emerging field. Through its Internship Mobility Partnerships (IMPs) SPRITE offers an innovative training package, providing the researchers with the opportunity to gain real world experience and business facing skills in the private and public sectors. In addition, ELVEs (European Laboratory Visit Exchanges) are an integral part of the training program. In combination with the IMPs, every ER and ESR will thus spend up to 30% of its time outside its host laboratory, part of this time in another EC country. Collaboration with the IAEA opens up a further dimension to SPRITE, enabling the researchers to put their research into a global context and to interact with scientists from all over the world. Despite the numerous participants SPRITE is able to offer a personalized training program. For this purpose the Action Planner, a web-based training needs analysis tool, developed at the University of Surrey will be used. This maps on to the Researcher Development Framework, currently being trialled by the European Science Foundation. Action Planner allows the training for each researcher to be tailored to their individual needs and aspirations. In addition to individualized training, SPRITE organizes network wide training events, encompassing amongst others technical training and business facing skills. In this way SPRITE researchers will leave not only as a brilliant and experienced researcher but also as a skilled manager, able to lead their own group.

PubMed | Karlsruhe Institute of Technology, Ludwig Boltzmann Institute of Osteology at the Hanusch Hospital of and Trauma Center Meidling, BAM Federal Institute of Materials Research and Testing, IfG Institute for Scientific Instruments GmbH and Atominstitut Vienna
Type: Journal Article | Journal: Journal of synchrotron radiation | Year: 2016

In the quest for finding the ideal synchrotron-radiation-induced imaging method for the investigation of trace element distributions in human bone samples, experiments were performed using both a scanning confocal synchrotron radiation micro X-ray fluorescence (SR-XRF) (FLUO beamline at ANKA) setup and a full-field color X-ray camera (BAMline at BESSY-II) setup. As zinc is a trace element of special interest in bone, the setups were optimized for its detection. The setups were compared with respect to count rate, required measurement time and spatial resolution. It was demonstrated that the ideal method depends on the element of interest. Although for Ca (a major constituent of the bone with a low energy of 3.69keV for its K XRF line) the color X-ray camera provided a higher resolution in the plane, for Zn (a trace element in bone) only the confocal SR-XRF setup was able to sufficiently image the distribution.

Boone M.N.,Ghent University | Garrevoet J.,Ghent University | Tack P.,Ghent University | Scharf O.,IfG Institute for Scientific Instruments GmbH | And 6 more authors.
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | Year: 2014

High resolution X-ray radiography and computed tomography are excellent techniques for non-destructive characterization of an object under investigation at a spatial resolution in the micrometer range. However, as the image contrast depends on both chemical composition and material density, no chemical information is obtained from this data. Furthermore, lab-based measurements are affected by the polychromatic X-ray beam, which results in beam hardening effects. New types of X-ray detectors which provide spectral information on the measured X-ray beam can help to overcome these limitations. In this paper, an energy dispersive CCD detector with high spectral resolution is characterized for use in high resolution radiography and tomography, where a focus is put on the experimental conditions and requirements of both measurement techniques. © 2013 Published by Elsevier B.V. All rights reserved.

Reinhardt F.,Physikalisch - Technische Bundesanstalt | Reinhardt F.,Bruker | Nowak S.H.,University of Fribourg | Nowak S.H.,IfG Institute for Scientific Instruments GmbH | And 3 more authors.
Journal of Analytical Atomic Spectrometry | Year: 2014

Grazing incidence X-ray fluorescence spectra of nano-scaled periodic line structures were recorded at the four crystal monochromator beamline in the laboratory of the Physikalisch-Technische Bundesanstalt at the synchrotron radiation facility BESSY II. For different tilt angles between the lines and the plane of incidence of the monochromatic synchrotron radiation, spectral features are observed which can be understood and explained with calculations of the emerging X-ray standing wave (XSW) field. On the other hand, there are structures, i.e., pronounced modulations above the substrate's critical angle of external total reflection, which are not included in the XSW concept. Novel geometrical optics calculations can reproduce these structures taking the sample's specific geometric conditions into account. © 2014 the Partner Organisations.

Radtke M.,BAM Federal Institute of Materials Research and Testing | Buzanich G.,BAM Federal Institute of Materials Research and Testing | Curado J.,BAM Federal Institute of Materials Research and Testing | Reinholz U.,BAM Federal Institute of Materials Research and Testing | And 2 more authors.
Journal of Analytical Atomic Spectrometry | Year: 2014

Recent advances in synchrotron sources and detector technology have led to substantial improvements in spatial resolution and detection limits for X-ray fluorescence analysis (XRF). However, the non-destructive three-dimensional elemental sensitive characterization of samples remains a challenge. We demonstrate the use of the so-called "Color X-ray Camera" (CXC) for 3D measurements for the first time. The excitation of the sample is realized with a thin sheet-beam. The stepwise movement of the sample allows getting the elemental distribution for each layer with one measurement. These layers can be combined to a full 3D dataset for each element afterwards. Since the information is collected layer by layer, there is no need to apply reconstruction techniques, which quite often are the reason for artifacts in the results achieved by computed tomography (CT). The field of applications is wide, as the 3D elemental distribution of a material contains clues to processes inside the samples from a variety of origins. The technique is of special interest and well suited for biological specimens, because their light matrix minimizes restricting absorption effects. Measurement examples of a hornet and the teeth of a Sorex araneus are shown. This journal is © the Partner Organisations 2014.

Grassi N.,National Institute of Nuclear Physics, Italy | Guazzoni C.,Polytechnic of Milan | Alberti R.,Polytechnic of Milan | Klatka T.,Polytechnic of Milan | Bjeoumikhov A.,IfG Institute for Scientific Instruments GmbH
Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms | Year: 2010

We developed a PIXE detection system for the analysis of medium-light elements which exploits a weakly focusing polycapillary lens for the transmission of the X-rays emitted from the target material to a Silicon Drift Detector. The polycapillary lens efficiently collects X-rays, while prevents back-scattered protons from impinging on the detector chip, thus avoiding electronics perturbation and consequent quality loss of PIXE spectra. The system is optimized for the detection of X-rays in the energy range 1-10 keV, when the emission from the target is induced by MeV proton beams with size of the order of a few hundreds of micrometers. This work reports the results of the lens characterization in terms of X-ray collection spot, i.e. the area of the sample actually "seen" by the lens, and its dependence on the X-ray energy. The lens properties have been measured using the external scanning microbeam facility of the Tandetron accelerator at LABEC-INFN in Florence. The detection system was used to detect X-rays from a set of pure elemental standards with an incident 3 MeV proton beam focused to a size of about 30 μm scanning an area of 1.9 × 1.6 mm2. By measuring the spatial distribution of characteristic X-rays from each given material, the collection profile of the lens at the corresponding X-ray energy was obtained. Using several standards, the behaviour throughout the range 1-10 keV was examined. The sensitivity of the lens collection profile on the lens-sample out-of-focus distance was also investigated. © 2010 Elsevier B.V. All rights reserved.

Rackwitz V.,BAM Federal Institute of Materials Research and Testing | Procop M.,IfG Institute for Scientific Instruments GmbH | Bjeoumikhova S.,IfG Institute for Scientific Instruments GmbH | Panne U.,BAM Federal Institute of Materials Research and Testing | And 2 more authors.
Journal of Analytical Atomic Spectrometry | Year: 2011

The accurate knowledge of the properties of polycapillary X-ray semi-lenses has a significant influence on the quantitative results in a widespread field of applications involving microfocus X-ray beams. A routine procedure for the characterisation of a polycapillary X-ray semi-lens with a scanning electron microscope (SEM) having attached an energy dispersive spectrometer (EDS) is presented in this paper. A key issue of the procedure consists of fitting the semi-lens in front of the EDS for spectra acquisition. Relevant semi-lens parameters such as focal distance, full width at half maximum (FWHM) of the acceptance area, and transmission are determined in parallelising mode of the semi-lens. Special attention has been paid to the calculation of the transmission. © 2011 The Royal Society of Chemistry.

IfG Institute for Scientific Instruments GmbH and Helmholtz Center Berlin | Date: 2014-04-16

The present invention relates to a method and device for determining the energetic composition of electromagnetic waves. It is the object of the present invention to provide a method and device for X-ray spectroscopy that allows simultaneous detection of the individual energies at a comparatively higher resolution and/or across a comparatively wider energy range. According to the invention, at least one reflective zone plate (12) is used that comprises a multitude of predefined wavelength-selective regions (14) arranged next to one another, wherein the wavelength-selective regions (14) each include a multitude of reflecting arched portions (20), which extend exclusively and continuously across the respective wavelength-selective region (14).

PubMed | ORTHOCLINIC Hamburg, IfG Institute for Scientific Instruments GmbH and University of Hamburg
Type: | Journal: Journal of biomedical materials research. Part B, Applied biomaterials | Year: 2016

Most resurfacing systems are manufactured from cobalt-chromium alloys with metal-on-metal (MoM) bearing couples. Because the quantity of particulate metal and corrosion products which can be released into the periprosthetic milieu is greater in MoM bearings than in metal-on-polyethylene (MoP) bearings, it is hypothesized that the quantity and distribution of debris released by the MoM components induce a compositional change in the periprosthetic bone. To determine the validity of this claim, nondestructive -X-ray fluorescence analysis was carried out on undecalcified histological samples from 13 femoral heads which had undergone surface replacement. These samples were extracted from the patients after gradient time points due to required revision surgery. Samples from nonintervened femoral heads as well as from a MoP resurfaced implant served as controls. Light microscopy and -X-ray fluorescence analyses revealed that cobalt debris was found not only in the soft tissue around the prosthesis and the bone marrow, but also in the mineralized bone tissue. Mineralized bone exposed to surface replacements showed significant increases in cobalt concentrations in comparison with control specimens without an implant. A maximum cobalt concentration in mineralized hard tissue of up to 380 ppm was detected as early as 2 years after implantation. Values of this magnitude are not found in implants with a MoP surface bearing until a lifetime of more than 20 years. This study demonstrates that hip resurfacing implants with MoM bearings present a potential long-term health risk due to rapid cobalt ion accumulation in periprosthetic hard tissue. 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 2016.

PubMed | IfG Institute for Scientific Instruments GmbH, CNR Institute of Archeological Heritage - Monuments and Sites and National Institute of Nuclear Physics, Italy
Type: | Journal: Analytical chemistry | Year: 2016

A full field-X-ray camera (FF-XRC) was developed for performing the simultaneous mapping of chemical elements with a high lateral resolution. The device is based on a conventional CCD detector coupled to a straight shaped polycapillary. Samples are illuminated at once with a broad primary beam that can consist of X-rays or charged particles in two different analytical setups. The characteristic photons induced in the samples are guided by the polycapillary to the detector allowing the elemental imaging without the need for scanning. A single photon counting detection operated in a multiframe acquisition mode and a processing algorithm developed for event hitting reconstruction have enabled one to use the CCD as a high energy resolution X-ray detector. A novel software with a graphical user interface (GUI) programmed in Matlab allows full control of the device and the real-time imaging with a region-of-interest (ROI) method. At the end of the measurement, the software produces spectra for each of the pixels in the detector allowing the application of a least-squares fitting with external analytical tools. The FF-XRC is very compact and can be installed in different experimental setups. This work shows the potentialities of the instrument in both a full field-micro X-ray fluorescence (FF-MXRF) tabletop device and in a full field-micro particle induced X-ray emission (FF-MPIXE) end-station operated with an external proton beam. Some examples of applications are given as well.

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