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PTB News

Three times a year, PTB News provides topical information from the varied spectrum of activities of the Physikalisch-Technische Bundesanstalt (PTB) consisting of fundamental research, legal metrology and PTB's various activities in the service of the economy.

PTB-News 2.2021 - SCIENTIFIC NEWS

The new “Quantum Valley Lower Saxony” research alliance has set itself the goal of developing a quantum computer within a period of five years. The German federal state of Lower Saxony and the Volkswagen Foundation are providing 25 million euros of funding for this alliance, which pools excellent research projects and research capabilities in Lower Saxony. This initiative aims to exploit the...

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A novel ionization vacuum gauge offers a solution for the stability of commercially available devices that has been insufficient so far and enables predictable sensitivities. This is made possible by leading the electrons on a straight path through the ionization space.

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How can you superimpose light beams in such a way that they propagate spatially in the same direction as perfectly as possible while maintaining important properties such as polarization and spatial coherence? In a systematic investigation of several commercially available optical waveguides, auxiliary means that help master this demanding challenge has been found. This method enables technologies...

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PTB has developed a measuring instrument that can already characterize the magnetic properties of magnetic nanoparticles reliably during their synthesis. The demonstrator developed within the scope of PTB’s technology transfer program titled TransMeT has now undergone its first functional testing. With this device, it is planned to support the manufacturing of new reference materials for magnetic...

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PTB offers users from industry a new service. It can now validate whether measurement data that are transmitted within IoT networks comply with essential metrological requirements. For this purpose, PTB’s TraCIM service, which has already been established for many years, has been enhanced.

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Josephson arbitrary waveform synthesizers (JAWS) allow quantized AC voltages to be synthesized with arbitrary and spectrally pure waveforms. At PTB, a pulse-driven Josephson standard for the generation of AC voltages with series arrays has been realized. These arrays are based on stacks of up to five Josephson junctions. This new technology has allowed the integration density of the circuits – and...

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A natural constant should always have the same value, regardless of when or where it has been determined. Einstein’s famous general theory of relativity exploits this fundamental assumption, which is known as local position invariance (LPI). The validity of this assumption has now been confirmed by means of a comparison of optical ytterbium clocks at PTB with an accuracy increased by a factor of...

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PTB-News 2.2021 - TECHNOLOGY TRANSFER

Die Rasterkraftmikroskopie steht vor der Herausforderung, dreidimensionale Strukturen schnell und präzise zu messen. Diese schnelle Inspektion auf größere Flächen auszudehnen ist Ziel eines neuen hybriden Messsystems. 

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Ein neues Konzept aus der PTB für die additive Fertigung (auch 3D-Druck genannt) beschreibt eine zeitsparende, präzise Erzeugung von Bauteilen, die gezielt mit magnetischen Nanopartikeln als Zusatzstoffen angereichert sind. 

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In der industriellen Fertigung werden häufig Markerstrukturen genutzt, um die relative Lage zweier Objekte zueinander zu ermitteln. Eine neue Messmethode der PTB hat durch die Kombination von optischem Imaging und Scatterometrie eine Auflösung der räumlichen Überlagerung von unter 1 nm erreicht und ist dabei besonders schnell. 

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PTB-News 2.2021 - MISCELLANEOUS

Award

The master’s thesis by Felix Witt was awarded the Karl-Doetsch-Nachwuchspreis (an award for junior scientists) from the Aeronautics Research Centre Niedersachsen (NFL). Within the scope of a cooperation project between the Institute of Flight Guidance (IFF) of the TU Braunschweig and PTB᾽s Department 3.4, Analytical Chemistry of the Gas Phase, he developed a very rapid hygrometer for the absolute,...

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PTB and the company Salzgitter Flachstahl have concluded a cooperation agreement to test hydrogen volume measurement technology which is already available and to develop measurement procedures further. PTB will use a measurement section at the Salzgitter Flachstahl site to test measurement devices under real conditions. The experiments supplement PTB’s research activities related to the...

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A new research project called MELANI is investigating how several tenants in an apartment building could share a photovoltaic system and a storage battery. The Naturstrom and SMA Solar Technology AG companies as well as the elenia Institute for High Voltage Technology and Power Systems of the TU Braunschweig and PTB are participating in the project which is being funded with 2.3 million euros by...

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The International Cooperation Group of PTB is helping its partner countries during the COVID-19 pandemic to strengthen their quality infrastructure, for example in the certification of protective clothing for medical use, in the calibration of infrared thermometers or in testing ventilators. In an interdisciplinary task force, experts are working on optimizing virtual work processes so that PTB’s...

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In a three-year research project that started in October 2020, the departmental research institutes of the Federal Ministry for Economic Affairs and Energy (BMWi) are having their pasts during the national socialist (Nazi) period and the post-war era examined. PTB as well as the BAM Federal Institute for Materials Research and Testing and the Federal Institute for Geosciences and Natural Resources...

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In an administrative agreement, PTB and the German Accreditation Body (DAkkS) have reformed the deployment of PTB staff as assessors to the DAkkS. This reform ensures that assessors will continue to be independent and impartial even in changing conditions, for example due to the Data Security Regulation or the revision of DIN EN ISO/IEC 17011 and DIN EN ISO/IEC 17025.

(Contact: Michael Wolf, +49...

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In a new cross-institutional working group called “Advanced Materials” under the leadership of the Bundesanstalt für Risikobewertung (Federal Institute for Risk Assessment, BfR), an expert committee which includes experts from PTB will assess the potential health and environmental risks of advanced materials. The committee is intended to shed light on the future handling of advanced materials, new...

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