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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 2.2018 - Scientific News

The nucleus of thorium-229 possesses a property that is unique among all known nuclides: It should be possible to excite it with ultraviolet light. To date, little has been known about the low-energy state of the Th-229 nucleus that is responsible for this property. Now it has become possible for the first time to determine the charge distribution of this nuclear state by means of spectroscopic...

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Good agreement between the results of different calibration methods (shock or sine) has been achieved for the first time. This was made possible by a mathematical model of a measuring setup with the force transducers elastically coupled on both sides.

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Conventional calibration certificates could soon become history. To furnish proof that a measuring instrument has been calibrated and of how this has been done, metrology institutes throughout the world could, in the near future, use digital calibration certificates (DCCs) rather than their analog version. Especially the fact that they are machine-readable speaks in favour of DCCs for production...

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The more power that is generated by regenerative energy sources, the more complex the power grids become. This makes it ever more important to set up intelligent power grids where producers, consumers and measurement points communicate with each other. Within the scope of an EU project, mathematical modeling procedures have been developed to make the behavior of power grids more predictable and to...

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PTB has developed a camera system for sentinel lymph node mapping using the fluorescent contrast agent indocyanine green. The system has been successfully tested in collaboration with the Department of Gynecology of the Charité university hospital in Berlin.

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In collaboration with the University of Würzburg, PTB has succeeded in measuring the quantum anomalous Hall effect with a relative measurement uncertainty of 2.5 · 10–7. This represents an improvement by nearly three orders of magnitude. It brings the on-chip integration of quantum Hall resistance standards with Josephson voltage standards one step closer to reality, which would be a breakthrough...

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According to a European quality guideline, elemental contaminations in medicinal products have to be adequately controlled. Consequently, the “European Directorate for the Quality of Medicines and HealthCare” (EDQM), the Joint Research Center (JRC) Geel, the Federal Institute for Materials Research and Testing (BAM) and the PTB have prepared high-accuracy reference solutions for four particularly...

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PTB News 2.2018 - Technology transfer

Flow rate measuring technology requires exact fluid delivery for testing and calibration rigs. These systems should be able to continuously deliver constant volume flow rates. PTB has developed a new device consisting of two synchronized piston systems which can generate a constant and pulsation-free fluid flow. In addition, the flow rate can be varied quickly. Optical positioning provides exact...

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The traceable measurement of torques of more than 2 MN ∙ m is of paramount importance in areas such as wind energy. An invention developed at PTB enables traceability by segmenting the torque into several force signals that are measured over a defined lever length. In addition, the torque sensor can decouple most of the mechanical disturbing components. The measurement uncertainty amounts to a...

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The handling and exact controlling of microgrippers requires high precision. The measuring devices used to date are characterized by great manufacturing effort and only allow a limited selection of materials to be used. PTB's concept simplifies the measurement of the gripping force: the grippers are segmented and interconnected by means of spring elements to reduce their stiffness. Markers are...

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PTB News 2.2018 - Miscellaneous

Awards

Dietmar Drung, Hansjörg Scherer, Martin Götz, Eckart Pesel
These staff members of departments 7.2, Cryophysics and Spectrometry, (D. Drung) and 2.6, Electrical Quantum Metrology, (H. Scherer, M. Götz, E. Pesel) have won this year's Helmholtz Prize in the category “Precision measurements in applied metrology”. They have been given this award for the development of a new current amplifier, the...

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Der PTB-Jahresbericht hat mit der gerade erschienenen Ausgabe 2017 ein neues Gesicht bekommen: knapper, nachrichtlicher, bunter, informativer. Sie finden ihn als pdf zum Herunterladen auf der Website der PTB unter „Presse & Aktuelles“ und dort unter „Zeitschriften & Magazine“.

Wenn Sie ihn als gedruckte Version kostenlos erhalten möchten, schicken Sie bitte eine Bestellung per E-Mail an Opens window for sending emailpresse@p...

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This year's World Metrology Day (on 20 May) marks the start of the countdown to the introduction of the new International System of Units (SI). The new – or rather revised – SI, in which all units are traced to fundamental constants, will in all likelihood be adopted by the CGPM in November 2018. The revised SI will then officially come into force on next year's World Metrology Day (20 May 2019)....

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