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Characterization of Voltage Transformers for MV Applications Up to 150 kHz - A Preliminary Study
No full textMagnetic Tracers for Magnetic Particle Imaging: Insight on the Roles of Frequency-Sustained Hysteresis and Interactions in Quantitative Imaging
No full textProduction and characterization of 111Ag radioisotope for medical use in a TRIGA Mark II nuclear research reactor
Get PDFErbium-Doped LiYF4 as a Potential Solid-State Frequency Reference: Eligibility and Spectroscopic Assessment
Get PDFTime and frequency metrology is a key enabler for both forefront science and innovation. At the moment, atomic frequency standards (AFSs) are based on atoms either in the vapor phase or trapped in magneto-optical lattices in a vacuum. Finding a solid-state material that contains atoms suitable to be used as a frequency reference would be an important step forward in the simplification of the setup of AFSs. Lanthanide-doped inorganic crystals, such as Er-doped LiYF4, have been studied for several decades, and their intrashell 4f transitions are usually identified as ultra-narrow. Nevertheless, a systematic characterization of these transitions and their linewidths with a correlation to the dopant’s concentration and isotopic purity at low temperatures is lacking. In this work, we studied Er-doped LiYF4 as a potential benchmark material for solid-state frequency references. We chose Er as it has a set of transitions in the telecom band. The influence of Er concentrations and isotope purity on the transition linewidth was systematically studied using high-resolution optical spectroscopy at 5 K. The results indicate that the material under study is an interesting potential candidate as a solid-state frequency reference, having transition linewidths as low as 250 MHz at ~1530 nm
Nanodimensional characterization on nanowires: an interlaboratory comparison between AFMs
No full textLow intensity saturation of an ISB transition by a mid-IR quantum cascade laser
Get PDFWe demonstrate that absorption saturation of a mid-infrared intersubband transition can be engineered to occur at moderate light intensities of the order of 10-20 kW cm (-2) and at room temperature. The structure consists of an array of metal-semiconductor-metal patches hosting a judiciously designed 253 nm thick GaAs/AlGaAs semiconductor heterostructure. At low incident intensity, the structure operates in the strong light-matter coupling regime and exhibits two absorption peaks at wavelengths close to 8.9 lm. Saturation appears as a transition to the weak coupling regime-and therefore, to a single-peaked absorption-when increasing the incident intensity. Comparison with a coupled mode theory model explains the data and permits to infer the relevant system parameters. When the pump laser is tuned at the cavity frequency, the reflectivity decreases with increasing incident intensity. When instead the laser is tuned at the polariton frequencies, the reflectivity non-linearly increases with increasing incident intensity. At those wavelengths, the system, therefore, mimics the behavior of a saturable absorption mirror in the mid-IR range, a technology that is currently missing
Advanced methods for assessment of chemical compositions of multicomponent substances or materials and their categorical property values
Get PDFFGQT Q05 Quantum Technologies Use Cases [written by the CEN-CENELEC Focus Group on Quantum Technologies (FGQT)]
Get PDFQuantum technologies form a booming field of research areas. Often, we subdivide the field of quantum technologies in quantum computing, quantum communication and quantum sensing. Some also include a fourth: quantum simulation. Each of them has a different level of maturity and therefore different standardization needs.
Standards can help mature a field and allow for interoperability of different devices or parts of a larger device. Especially in the field of quantum technologies, we expect only a small number of parties to be able to manufacture the hardware by themselves. More likely is that a party focuses on only a small part of the hardware or software stack. The output of the products of these parties has to interoperate with the input and/or output of the products of other parties.
The standardization needs and the level of maturity of specific quantum applications may be uncorrelated. Furthermore, it might be difficult to directly define standards for some application. Instead, use cases allow to freely think about some application and how it should interact with the outside world and with other components of a larger system and which interfaces are necessary. From this, we can determine where which standards are needed when and the characteristics of this use-case.
Even though use cases can imply standards or standardization needs, they not have to. Use cases are relevant on their own as they give a sense of what the community is interested in and what applications of quantum technologies are possible.
The use cases presented in this document are unstructured, both in topic and in the readiness or implication on standardization. Each subsection contains a separate use case and starts with a description, enabling technologies and standardization needs. Some use cases follow with a deeper discussion of the spects where standards are needed or might be beneficial
European Metrology Network (EMN) for Advanced Manufacturing
Get PDFThe European Metrology Network (EMN) for Advanced Manufacturing has been established in June 2021. Currently 11 EMNs focussing on different important topics of strategic importance for Europe exist and form an integral part of EURAMET, the European Association of National Metrology Institutes (NMI). EMNs are tasked to
- develop a high-level coordination of the metrology community in Europe in a close dialogue with the respective stakeholders (SH)
- develop a Strategic Research Agenda (SRA) within their thematic areas
- provide contributions to the European Partnership on Metrology research programme
Based on the analysis of existing metrology infrastructures and capabilities of NMIs, the metrology research needs for advanced manufacturing are identified in close cooperation with academic, governmental and industrial stakeholders. Here, we report on advanced materials metrology needs addressed in the EMNs preliminary SRA
Fabrication and spectroscopy of high-quality Tm3+-doped germanate glass for 2 μm laser emission
Get PDFA high-quality Tm-germanate glass was fabricated with homogeneous ions distribution. Spectroscopic characterization for pump and laser transitions as well as preliminary results on laser generation at 2 μm are reported