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Brain pacemakers are very helpful for diseases such as Parkinson’s. But an implant can cause dangerous
tissue heating during an MRI scan. (X-ray image; source: Wikimedia Commons)

With well over 100 million examinations per year worldwide, magnetic resonance imaging (MRI) is the second most important medical imaging method. However, patients with implants often have to refrain from this life-saving diagnostic option or accept a lower image quality. Especially with active implants, such as cardiac pacemakers and neurostimulators, MRI scanning can lead to dangerous tissue heating in the body if not applied in a cautious way. PTB has shown that wireless communication between the implant and the magnetic resonance scanner can solve this problem.

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Windräder und Flugzeug

Es machte Schlagzeilen: Das PTB-Projekt WERAN hat auf einen Schlag sehr viele neue potenzielle Flächen für Windenergieanlagen freigemacht. In dem Projekt wurde gezeigt, dass Windenergieanlagen weniger Einfluss auf Funksignale haben als davor angenommen. Daher hat die DFS Deutsche Flugsicherung GmbH Anfang 2023 die Schutzbereiche rund um einige ihrer Flugsicherungsanlagen verkleinert: Der Anlagenschutzbereich von Drehfunkfeuern (innerhalb dessen zu prüfen ist, ob Windenergieanlagen die Funknavigation beeinflussen) beträgt jetzt nicht mehr 15 km, sondern nur noch 7 km. Das ergab mehr als 21 000 Quadratkilometer neue Flächen für Windenergieanlagen. Jetzt geht die Forschung noch weiter, ist aber nicht mehr primäre Aufgabe eines nationalen Metrologieinstitutes: Ein neues An-Institut an der Jade-Hochschule Wilhelmshaven übernimmt den Staffelstab.  

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Robert Habeck in der PTB

Freudig übernahm im Frühsommer Robert Habeck den Stift, um die neue Anlage in der PTB zu signieren. Nun steht sie kurz vor ihrem Einsatz – und Hersteller der allergrößten Windenergieanlagen (etwa für Offshore-Windparks) stehen quasi vor der Tür. Sie wollen an der riesigen Drehmoment-Normalmesseinrichtung der PTB – der größten Anlage ihrer Art weltweit – ihre Messgeräte kalibrieren. Das Ziel: Windenergie soll sich noch mehr lohnen!

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“Think Metrology” is the motto from 26-29 August 2024 at the World Congress of the International Measurement Confederation (IMEKO). It will be a summit meeting for the world’s leading metrologists. More than 700 researchers and users will report on innovations and current topics stemming from the expansive field of metrology. You can already register and submit your paper.

Further information: Opens external link in new windowhttps://www.imeko2024.org 
(Contact: Opens local program for sending emailimeko2024(at)ptb.de)

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ELMEC Guide 7.2, “Software”, is the most widely used WELMEC manual. It is now available in an updated and revised 2023 version. This guide offers European notified bodies, manufacturers of measuring instruments and supervisory authorities harmonized technical interpretations of the fundamental demands of the European Measuring Instruments Directive (MID and of NAWID;31/2014/EU and 32/2014/EU). It is available here: Opens external link in new windowwww.welmec.org (Contact: Florian Thiel, +49 30 3481-7529, Opens local program for sending emailflorian.thiel(at)ptb.de)

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In the recently launched project “TruePA” (Truly Resilient Quantum Limited Traveling Wave Parametric Amplifiers), researchers from PTB and seven European partner institutions are jointly developing the next generation of parametric amplifiers, or TWPAs for short. Due to their extremely low noise, they are significant for the detection of weak electromagnetic signals at microwave frequencies of several gigahertz. The EU is providing three million euros in funding for the project which will run for three years. The project’s website: Opens external link in new windowwww.truepa.eu. (Contact: Lukas Grünhaupt, +49 531 592-9453, Opens local program for sending emaillukas.gruenhaupt(at)ptb.de)

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Auszeichnungen

Siegfried Hackel, Shanna Schönhals, Lutz Doering, Benjamin Gloger


(Foto: Andreas Rudolph)

Die Mitarbeitenden der Abteilung 1 Mechanik und Akustik haben den Sonderpreis der IHK Braunschweig für die Entwicklung des digitalen Kalibrierzertifikats (Digital Calibration Certificate, DCC) erhalten.

Karl Jousten
Der Leiter des Fachbereichs 7.5. Wärme und Vakuum hat den Rudolf-Jaeckel-Preis der Deutschen Vakuumgesellschaft für seine herausragenden, grundlegenden Arbeiten im Bereich der Vakuum-Druckmessung erhalten.

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Siegfried Hackel, Shanna Schönhals, Lutz Doering, Benjamin Gloger
(Foto: Andreas Rudolph) These staff members of Division 1, Mechanics and Acoustics, have received the special prize from Braunschweig’s Chamber of Industry and Commerce (IHK) for developing the Digital Calibration Certificate (DCC).

Karl Jousten
Karl Jousten, Head of Department 7.5, Heat and Vacuum, has received the Rudolf Jaeckel Prize of the German Vacuum Society (DVG) for his outstanding work in the field of vacuum pressure measurement.

 

 

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Single-photon detectors are being used more and more frequently for applications such as quantum communication, quantum computing and quantum imaging as well as for experiments in the fields of astrophysics and materials science. To detect the single photons, PTB’s concept requires the detector to be constructed from a two-dimensional superconductor. A hole pattern of non-superconducting areas is integrated into the superconductor. This geometry allows an absorbed photon in one of these areas to induce an avalanche-like transition to normal conductivity in the detector. It induces an excess voltage, which allows the absorption of the photon to be detected.

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Kibble balances weigh using a voice coil actuator with electromagnetic force compensation. For the calibration of Kibble balances with a larger measuring range (from grams to kilograms), optical methods are used. A new method developed at PTB allows the correction of errors caused by tilting mirrors, the so-called Abbe errors. This calibration procedure has been tested at PTB and can also be used for other applications where the Abbe error occurs. (Technology Offer 538)

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