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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 2.2022 - SCIENTIFIC NEWS

In the past few years, increasing attention has been paid to the use of photon momenta in metrology, mainly in the field of radiometry, but also in force and mass measurement. This is due to the fact that photons behave like particles. When they collide with matter, the resulting momentum transfer can be used for measuring optical power or, vice versa, for generating a small force. This method of...

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At PTB, optical thin-film materials for extreme ultraviolet lithography are systematically investigated at a wavelength of 13.5 nm. The optical constants (i.e., the refractive index and the extinction coefficient) have now been determined in the wavelength range between 10 nm and 20 nm with small uncertainties based on reflection measurements performed with synchrotron radiation.

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Which UV-C air purifier is effective against coronaviruses? Under which conditions? Are these devices safe to use? A publication developed by the DIN institute in collaboration with PTB ensures more safety for manufacturers, potential users and planners. Particular attention is paid to the safety of these devices, especially as concerns their use in schools or daycare facilities.

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In conventional gear and screw thread metrology, measurements for evaluating the quality of components are performed only pointwise or linewise in selected transverse and axial sections, respectively. In light of tighter manufacturing tolerances and new challenges brought on by modern production processes, this procedure is not sufficient. At PTB, a universal procedure has been developed to...

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The highly accurate form measurement of optical aspheres and free-form surfaces represents a great challenge in metrology. A new method uses artificial intelligence (AI) – i.e., deep neural networks – to reconstruct optical surfaces from the measurement data of a tilted-wave interferometer. In addition, this method quantifies the uncertainty of the prediction.

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Due to their higher reference frequency, optical clocks enable measurements that are even more accurate than those of conventional atomic clocks. Until now, however, optical clocks could only be operated by experts in special laboratories. Within the scope of Opticlock, an industry-led pilot project for quantum technologies, a demonstrator of an optical clock has been built. This demonstrator...

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German government planning foresees the installation of one million public charging stations for electric vehicles in Germany by 2030. Whereas the correct metering and billing of fuel is reliable and a matter of course at conventional filling stations, the measurement technology used in particular for fast charging stations is still new and constantly being improved. A mobile measuring system...

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PTB-News 2.2022 - TECHNOLOGY TRANSFER

The ability to measure even the smallest grip forces, in particular for the nondestructive handling and manipulation of highly sensitive materials such as biological cells, is indispensable in medical research and the pharmaceutical industry.

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In biomedical research and clinical care, it is becoming ever more important to detect biomarkers (pathogenic proteins and cells) quantitatively in order to understand systemic processes or to make decisions as regards diagnostics and therapy.

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PTB-News 2.2022 - MISCELLANEOUS

The former President of PTB, Prof. Dr. Joachim Ullrich, passed the baton to Prof. Dr. Cornelia Denz on 1 May 2022. She is the first female president in PTB’s more than 135-year history. Before taking on this post, Cornelia Denz headed the Institute of Applied Physics at the Westfälische Wilhelms- Universität Münster for seven years. Because she has been a member of the “Kuratorium” (Advisory...

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Over the next seven years, the EU will provide 300 million euros in funding for a new metrology research program called the “European Partnership on Metrology”. The Member States will contribute at least the same amount. EURAMET e.V. is implementing the program and has already launched a call so that selected projects can start as of mid-2022. As the national metrology institute of Germany, PTB...

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The nationwide joint project titled QSolid intends to develop a collaboration platform for a quantum computer based on superconducting circuits within the next five years. It is also planned that a demonstrator system will be set up within this context. For this project, PTB’s work will include developing particularly low-noise, next-generation superconducting and methods to improve the control...

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Calidena

An initiative called “Calidena” (a blend of the Spanish words “calidad”, quality, and “cadena”, chain) is supporting developing countries and countries in transition in improving their quality infrastructure – especially in the agrarian sector – for 18 months. Through its participative approach, this initiative which was launched at PTB brings together producers, buyers, trade chambers, government...

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The new Walther Meissner Building was officially dedicated at PTB’s site in Berlin-Charlottenburg on 22 April 2022. Work will be carried out on quantum and cryosensors, cryo- and primary thermometry and photonic pressure measurements in this research building. One focus is the development, manufacturing and application of PTB’s world leading highly sensitive superconducting quantum interference...

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Awards

Volker Wittstock

Volker Wittstock, a scientist from Department 1.7 Acoustics and Dynamics, was named an honorary professor by the Faculty for Mechanical Engineering of the TU Braunschweig in recognition of his many years of commitment as a lecturer on the subject of acoustics.

Lena Ruwe

Lena Ruwe, a researcher in Department 3.7 Fundamentals of Explosion Protection, received the Jürgen Warnatz...

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