Lawrence Livermore National Laboratory

Stephan Friedrich

Deputy Group Leader,
Rare Event Detection

Nuclear and Chemical Sciences Division

 +1 925-423-1527

PhD Applied Physics
Yale University
MS Physics
University of Colorado
BS Physics
University of Tübingen


Stephan Friedrich studied physics at the University of Tübingen and the University of Colorado and received his PhD in applied physics from Yale University. He has previously won two R&D 100 awards: one for creating a product to meld mass and gamma-ray spectroscopy, and another for the superconducting tunnel junction x-ray spectrometer. Friedrich currently serves as the deputy group leader for the Rare Event Detection group in the Nuclear & Chemical Sciences Division.

Friedrich’s research interests include the development of high-resolution superconducting x-ray and gamma-ray spectrometers and their application in material science, nuclear physics, astronomy, and national security.

Honors and Awards

  • 2006 R&D100 Award for Superconducting Gamma and Fast-neutron Detectors
  • 2014 R&D100 Award for Superconducting Tunnel Junction X-ray Spectrometer

Selected (Recent) Publications

"Development of MMC Gamma Detectors for Nuclear Analysis", C. R. Bates, C. Pies, S. Kempf, L. Gastaldo, A. Fleischmann, C. Enss, S. Friedrich, J. Low Temp. Phys. 176, 631–636 (2014)

"112-Pixel Arrays of High-Efficiency STJ X-Ray Detectors", S. Friedrich, J. Harris, W.K. Warburton, M. H. Carpenter, J.A. Hall, R. Cantor, J. Low Temp. Phys. 176, 553-559 (2014)

"Praseodymium valence determination in Lu2SiO5, Y2SiO5, and Lu3Al5O12 scintillators by x-ray absorption spectroscopy", M. Zhuravleva, S. Friedrich, C. L. Melcher, Appl. Phys. Lett. 101, 101902 (2012)

"Nuclear Diagnostics with Cryogenic Detectors", S. Friedrich, Nucl. Inst. Meth A 579, 157-160 (2007)

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