Physikalisch-Technische Bundesanstalt PTB - Firma in Berlin

Physikalisch-Technische Bundesanstalt PTB

Magnusstraße 9, 12489 Berlin

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+49 30 3481-0 +49 30 3481-7503


Dr. Gerhard Ulm +49 30 3481-7312


Photon radiometry
Application of synchrotron radiation in the UV, EUV, VUV, and X-ray spectral range at the electron storage rings Metrology Light Source (MLS) and BESSY II for basic and applied metrological tasks with main focus on radiometry:

  • Realisation of radiometric units by using the primary source standards MLS and BESSY II as calculable sources of synchrotron radiation according to Schwinger's theory
  • Realisation of spectral responsivity scales in the UV, VUV, EUV, and X-ray ranges by means of cryogenic radiometers as primary detector standards
  • Calibration of radiation sources and detectors from the UV to X-rays
  • Investigation of photon-matter interaction for the development of radiation detectors
  • Characterisation and quality assurance of optical components and assembled systems from the UV to X-rays, in particular for EUV lithography
  • Investigation of nanolayers and nanoparticles applying X-ray reflectometry and Small-Angle X-ray Scattering (SAXS)
  • Photon diagnostics and materials research at X-ray lasers



  • Services
  • Research and De­vel­op­ment


The New Guys at IGAFA
The New Guys at IGAFA
The metrologist Gerhard Ulm and the materials scientist Matthias Bickermann bring fresh blood to the team
Tracking down smallest biomarkers
Tracking down smallest biomarkers
PTB and Dectris have developed a vacuum-compatible X-ray detector that allows the size of low-contrast nano-objects to be determined
Dr. Gerhard Ulm
Head of the scientific division called “Temperature and Synchrotron Radiation” at the Physikalisch-Technische Bundesanstalt
Prof. Dr. rer. nat. Mathias Richter
The physicist is head of the department of X-ray metrology using synchrotron radiation at PTB in Berlin-Adlershof.