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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 1.2020 - Scientific News

In cooperation with the Max Planck Institute for Nuclear Physics in Heidelberg, the QUEST Institute at PTB has succeeded for the first time in performing precision spectroscopy on highly charged ions. This pioneering experiment makes the field of highly charged ions accessible for research on novel atomic clocks and tests of fundamental physics.

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Within the framework of a technology transfer project, an optical singleparticle counter has been developed at PTB to detect and determine the size of micro- and nanoparticles in suspension. The resulting prototype covers a dynamic measuring range that allows polystyrene particles from 80 nm to 8 μm in diameter to be detected.

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For the first time, PTB has succeeded in determining the specific activity of a thorium-227 solution very accurately by means of liquid scintillation counters. This means that traceable activity measurements of this radionuclide, which is being tested for radioimmunotherapy in nuclear medicine, are now possible. Also, the half-life of thorium-227 was determined by means of two measurement methods.

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Within the scope of the work on the redefinition of the base unit kelvin, PTB developed a new method for pressure measurement based on the capacitance measurement of helium gas. From the first attempt, it was almost as good as the world᾽s best method for pressure measurement with a piston manometer.

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For the first time worldwide, PTB has succeeded in showing how, to what extent and under which conditions wind turbines influence the signal integrity of air navigation systems. These findings have made a forecasting tool possible that could speed up the decision- making process for hundreds of building applications that are stuck in the ”approval backlog“.

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Non-spherical optical surfaces, i.e. aspheres and freeform surfaces, are nowadays essential components of many modern imaging systems in industry and research. To test high-precision measuring instruments for the measurement of aspheres and freeform surfaces, special reference surfaces have been developed which consist of several spherical segments with differing radii. The first prototypes have...

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PTB News 1.2020 - Technology transfer

New challenges are arising for modern optical measuring systems with regard to the simulation and optimization of the measuring systems and assessment procedures. This is particularly true of form measurement systems for aspheres, freeform surfaces and the simulation of optical systems such as those used in modern camera systems, and complex optical measuring systems. Optimizing procedures which...

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A detector developed at PTB measures the mean energy and charge of charged particles. These measurements are pulseresolved and take place in real time. The device, which delivers up to 10 measurements per second, is also suitable for continuous ion radiation and electron radiation . Moreover , its principle allows the energy of particle radiation of very low intensity to be determined. The device...

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Thin-film sensors enable the high-precision and spatially resolved measurement of various physical states, especially in particularly small places that are difficult to access, and under harsh environmental conditions. In thin-film sensor production, possible defects such as vias caused by pinholes in the insulation are particularly unwelcome as they may make the thin-film sensors applied useless....

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PTB-News 1.2020 - Micellaneous

Awards

Rudolf Meeß, Thomas Wiedenhöfer, Frank Härtig and Katharina Lehrmann The team of PTB scientists was awarded the Technology Transfer Prize of the Chamber of Industry and Commerce of Braunschweig for successfully passing on a masterpiece of metrological and product engineering from research to industry, namely ultrapure, extremely round silicon spheres which represent the new definition of the...

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Für die Entwicklung einer völlig neuen Atomuhr haben PTB-Forscher zusammen mit internationalen Kollegen einen prestigeträchtigen Synergy Grant des europäischen Forschungsrates ERC eingeworben. Ziel des Projektes, das für sechs Jahre mit insgesamt 13,8 Millionen Euro gefördert wird, ist die Entwicklung eines völlig neuen Typs Atomuhr:

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