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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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