Outcomes

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Publications view all
our research
Optics Express Vol. 25, 14, pp. 15624-15634 (2017)
Zone plates as imaging analyzers for resonant inelastic x-ray scattering
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We have implemented and successfully tested an off-axis transmission Fresnel zone plate as a novel type of analyzer optics for resonant inelastic x-ray scattering (RIXS). We achieved a spectral resolution of 64 meV at the nitrogen K-edge (E/dE = 6200), closely matching theoretical predictions. The fundamental advantage of transmission optics is the fact that it can provide stigmatic imaging properties. This opens up a variety of advanced RIXS configurations, such as efficient scanning RIXS, parallel detection for varying incident energy and time-resolved measurements.
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our research
Microelectron. Eng. 177, 25 (2017)
Systematic efficiency study of line-doubled zone plates
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Line-doubled Fresnel zone plates provide nanoscale, high aspect ratio structures required for efficient high resolution imaging in the multi-keV x-ray range. For the fabrication of such optics a high aspect ratio HSQ resist template is produced by electron-beam lithography and then covered with Ir by atomic layer deposition (ALD). The diffraction efficiency of a line-doubled zone plate depends on the width of the HSQ resist structures as well as on the thickness of the deposited Ir layer. It is very difficult to measure these dimensions by inspection in a scanning electron microscope (SEM) without performing laborious and destructive cross-sections by focus ion beams (FIB). On the other hand, a systematic measurement of the diffraction efficiencies using synchrotron radiation in order to optimize the fabrication parameters is not realistic, as access to synchrotron radiation is sparse. We present a fast and reliable method to study the diffraction efficiency using filtered radiation from an x-ray tube with a copper anode, providing an effective spectrum centered around 8 keV. A large number of Fresnel zone plates with varying dimensions of the resist structures and the ALD coating were measured in an iterative manner. Our results show an excellent match with model calculations. Moreover, this systematic study enables us to identify the optimum fabrication parameters, resulting in a significant increase in diffraction efficiency compared to Fresnel zone plates fabricated earlier without having feedback from a systematic efficiency measurement.
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our research
JINST, 12, P05024 (2017)
The hard X-ray Photon Single-Shot Spectrometer of SwissFEL—initial characterization
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SwissFEL requires the monitoring of the photon spectral distribution at a repetition rate of 100 Hz for machine optimization and experiment online diagnostics. The Photon Single Shot Spectrometer has been designed for the photon energy range of 4 keV to 12 keV provided by the Aramis beamline. It is capable of measuring the spectrum in a non-destructive manner, with an energy resolution of Δ E/E = (2–5) × 10−5 over a bandwidth of 0.5% on a shot-to-shot basis. This article gives a detailed description about the technical challenges, structures, and considerations when building such a device, and to further enhance the performance of the spectrometer.
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Deliverables view all
WP1 - Management
D1.3 - Setup and implementation of the TA and evaluation procedures
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NFFA-Europe offers to European and Third Country1 scientists from both academia and industry the possibility to carry out comprehensive projects for multidisciplinary research at the nanoscale. Activities are performed in six different types of Installations: - Lithography and nano-patterning (Litho) - Growth and synthesis (Growth) - Theory and Simulation (Theory) - Structural and Morphological nano-characterisation (SM Charact.) - Electronic and Chemical nano-characterisation (EC Charact.) - Magnetic, Optical and Electric nano-characterisation (ME Charact.) Each Installation includes laboratories located in different NFFA-EU sites; furthermore, when needed, limited2 access to co-located Large-Scale Facilities for Fine Analysis is offered as part of the access to Litho, or SM, EC or ME nano-characterisation. NFFA-Europe proposals necessarily include access to more than one type of Installation (e.g. Litho and Growth, Growth and Theory, SM Charact. and EC Charact., etc.) and cannot be limited to Fine Analysis only. Whenever possible access will be granted in a single NFFA-Europe site for all research steps. Access to more than one site for a given proposal will be considered only when technically or scientifically justified.
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WP1 - Management
D1.1 - Internal test of NFFA-Europe Website
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This deliverable describes the results achieved within task 1.5 “Communication”, and is also connected to the dissemination purposes of the project (WP11). The work done aimed at setting up the main information and functionalities of the website as a Single Entry Point (SEP) to find out about the project and access the offer of tools made available through NFFA-Europe research infrastructure.
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WP11 - Networking activities for NFFA user community impact and growth
D11.2 - Draft metadata standard for nanoscience data
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This document contains the NFFA Deliverable D11.2 “Draft metadata standard for nanoscience data” due in M6. It describes the approach, the relevant information management practices, standards and recommendations taken into account, as well as empirical research done by NFFA JRA3 for the purpose of metadata design, and then suggests a draft recommendation for NFFA metadata model. Having a common and well-defined metadata model is essential for human-to-human, human-to-machine and machine-to-machine interoperability in NFFA. Such a model will support the development of Information and Data management Repository Platform (IDRP) and will contribute to structured business analysis across the project. In return, the model will get further inputs from the continuing IT architecture design and business analysis. In addition to the NA activities, the deliverable has been discussed and validated through a number of conference calls and electronic communication in JRA3, as well as in the course of a dedicated face-to-face meeting in Abingdon, UK, in February 2016. The metadata model here proposed will be further validated, updated and detailed through the NFFA project activities within and beyond JRA3. It will be then finalised in D11.14 “Final metadata standard for nanoscience data” in M30. Approach
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