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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.

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 3.2019 - Scientific News

Medicine is placing high expectations on implants and auxiliary materials that are manufactured specifically for each individual patient. This can be done by means of additive manufacturing (3D printing), which allows nearly any complex shape to be produced. Before starting to use such implants widely, the medical sector and certification bodies demand proof of the fact that their high quality is...

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Within the scope of the mammography screening program, approved devices must ensure that radiologists are able to reliably detect even small contrasts. The imaging quality of each device is therefore checked every year by means of monitoring measurements. For this purpose, test images of phantoms are taken and assessed by means of procedures of data analysis. PTB has developed a simulation...

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At PTB, the reference radiation source of the EnMAP satellite for the remote sensing of the Earth has been calibrated with high resolution. This ensures the long-term comparability and traceability of its global measurement data from the fields of geobiology, geochemistry and geophysics.

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PTB's two caesium fountain clocks, CSF1 and CSF2, have been established as primary frequency standards and as the basis of PTB᾽s time scale for a long time. Exhaustive investigations have now allowed the uncertainties of these two clocks to be reduced by a factor of 5 (CSF1) and 2.4 (CSF2). With relative uncertainties of 2.7 ⋅ 10–16 reached for CSF1 and 1.7 ⋅ 10–16 for CSF2, these two clocks range...

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At PTB, a pulse-driven Josephson standard for the generation of AC voltages has been realized where the voltage pulses are synthesized by means of optical components. This has advantages compared to the conventional operating procedure where the driving voltage pulses are conducted onto the superconducting chip via RF conductors.

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Within the scope of a research consortium, researchers from PTB have succeeded in advancing as far as to reach a new regime of relativistic light/matter interaction. In the context of a compact laboratory experiment, extremely hot and dense plasmas were generated. These plasmas open up new perspectives for experiments on laser-induced nuclear physics and laboratory astrophysics.

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PTB News 3.2019 - Technology transfer

Integrating spheres are used to measure luminous flux; the same applies to the transmission measurement of microscope lenses. These transmission measurements can now be made more accurate thanks to a new additional element. The special insert developed at PTB serves as an adaptor between the aperture of the integrating sphere and the lens. Thanks to the insert, the lens is no longer in the...

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Battery cells must be tested with regard to their efficiency and operational reliability from the designing phase to the production process. For the thermal monitoring of batteries, a modular calorimeter has been developed at PTB. It consists of a variable number of practically identical components and allows the most diverse battery cell sizes to be examined. The modules are easily scalable with...

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To measure small angular changes in objects, autocollimators are used. The detector used for this purpose, often a two-dimensional CCD sensor, is illuminated by a linear reticle pattern. Its position on the sensor is detected and has a limited resolution due to the pixel size. In the new procedure, this reticle is projected onto the sensor at an angle set specifically for this sensor, relative to...

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PTB-News 3.2019 - Micellaneous

Awards

Oliver Hupe Oliver HupeThe Head of Working Group 6.31, “Photon Dosimetry”, was elected to the Council at the EURADOS Annual Meeting 2019. He will be a treasurer on the Executive Board. The European Radiation Dosimetry Group (EURADOS e. V.) is a network of more than 70 European institutions and 600 scientists.

Richard Lange Richard LangeThe doctoral candidate at Department 4.4, “Time and Frequency”, won the renowned...

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Forty years of successful cooperation between Germany and China were celebrated during a three-day official ceremony in Peking and sent on to the next stage: On 21 August, representatives of the Federal Ministry for Economic Affairs and Energy (BMWi) and the Chinese State Administration for Market Regulation (SAMR) signed a memorandum of understanding concerning the continuation of the cooperation...

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Medical data which can be life-saving in the case of an accident have so far been saved at different places and independently of each other. A project which is initially planned for three years and is funded by the Lower Saxony Ministry of Research and the Volkswagen Foundation with a budget of 1.2 million euros is intended to change that. In the project, TU Braunschweig, MHH (Hannover Medical...

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A new EURAMET metrology network called "Smart Electricity Grids" is dedicated to coordinating research activities related to intelligent power grids and establishing a sustainable European metrology research structure in this field. PTB is participating in operative efforts and is represented in the governing committees of the network.

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A further new EURAMET network is intended to establish Europe-wide uniform structures related to quality assurance in laboratory medicine and to guarantee the metrological traceability of important quantities in this field. In this way, the requirements of a new EU regulation on in-vitro diagnostics will be implemented.

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