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373 results:
  • 111. Bilateral comparison of traceable two-axis calibrations of an autocollimator between PTB and VTT MIKES  
    Date: 15.11.2021
    Percental score: 7 %
    In order to calibrate the two orthogonal measuring axes of autocollimators simultaneously, including the characterisation of their crosstalk, PTB and VTT MIKES developed calibration systems which are  
  • 112. 4.21 Form and Wavefront Metrology  
    Date: 03.06.2020
    Percental score: 7 %
    Selected publications The working group offers the following calibrations: Sphericity and radius measurement of sperical sections Refractive index measurement Transmission measurement on  
  • 113. A Prize for PTB Nanometrologist  
    Date: 16.07.2007
    Percental score: 7 %
    Thorsten Dziomba, a young PTB scientist, has been awarded the title "The Best Young Metrologist of COOMET". His presentation convinced the high-ranking committee, among them the  
  • 114. Determination of the angular distribution of backscattered particles at the ion accumulation experiment  
    Date: 26.09.2006
    Percental score: 7 %
    A monitor was developed for the measurement of sputtered and reflected particles to determine the mass contribution of particles which are backscattered through the entry hole of the collector at  
  • 115. PTB Seminar on the international comparability of pH value measurements  
    Date: 18.09.1996
    Percental score: 7 %
    As a measure of the acid or alkaline quality of a solution, the pH value is an important measurand as, among other things, in process technology, medicine and environmental protection. The  
  • 116. Dosimetry up to an altitude of 30 km  
    Date: 29.12.2011
    Percental score: 7 %
    Since the beginning of the 1990s, PTB has carried out dosimetric investigations of the secondary cosmic radiation in the atmosphere. In the course of time, the measuring instruments became more and  
  • 117. Afterwards  
    Date: 24.11.2023
    Percental score: 7 %
    Around the world in 55 days Arrival in Townsville (Pictures: Rieke Schäfer) Since Monday evening I’ve been back in Braunschweig, and my trip is now completed. As my flight from Townsville to  
  • 118. kcs07 en  
    Date: 08.03.2011
    Percental score: 7 %
    kcs07 en K-40 and Cs-137 in ground-level air in Braunschweig 2007 1,0 New Year's Eve firework (KClO4) New Year's Eve firework (KClO4) week 31: much dust, (highway reconstruction site at ca. 1 km  
  • 119. Touring exhibition on Hermann von Helmholtz  
    Date: 13.06.1997
    Percental score: 7 %
    This year it is 50 years since the Physikalisch-Technische Bundesanstalt (PTB) was established in Braunschweig. On this occasion, a series of events will be held from July 3 to 5, 1997. On July 3,  
  • 120. Quality Assurance for Radiation Therapy in Belgium Based on Alanine/ESR dosimetry  
    Date: 04.01.2010
    Percental score: 7 %
    In Belgium, a project started this year for quality assurance in radiotherapy, the so-called BeldART project (Belgian dosimetry audits in radiotherapy). The dosimetry measurement system employed by  
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