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Research Neutron Source Heinz Maier-Leibnitz (FRM II)
Hosting Legal Entity
Technical University of Munich
Lichtenbergstr. 1, Forschungs-Neutronenquelle Heinz Maier-Leibnitz (FRM II), Technische Universtität München, Garching, PO: 85748, Bavaria (Germany)
Type Of RI
Coordinating Country
Current Status:
Operational since 2004
Scientific Description
The Forschungs-Neutronenquelle Heinz Maier-Leibnitz (FRM II) is the most powerful neutron source in Germany and reaches worldwide the highest neutron flux (8•1014 n/cm2s) relative to its thermal power (20 MW). It is a beam tube reactor designed to provide neutrons for scientific experiments as well as for industrial and medical applications. The facility is operated as an integrative research centre by the Technische Universität München (TUM) in Garching near Munich, Germany. Its first criticality was achieved in March 2004.The FRM II is equipped with cold, thermal, hot and fast fission neutron sources and covers a broad range of applications, including experiments with positrons. An ultra-cold neutron source is under construction. Today, 27 instruments are operational. Furthermore, 7 irradiation systems for isotope production, silicon doping and analytical purposes are in service. An irradiation facility for the production of the medical isotope Mo-99 is under construction. For research purposes, a new neutron guide hall is being connected to the reactor building offering even more high-performance neutron scattering instruments in future. The FRM II is a user facility, which is organized under the name “Heinz Maier-Leibnitz Zentrum (MLZ)”. The MLZ represents the cooperation between the Technische Universität München (TUM) and two research centres of the Helmholtz Association, namely Forschungszentrum Jülich and Helmholtz-Zentrum Geesthacht (HZG) to exploit the scientific use of the FRM II. The MLZ is funded by the German Federal Ministry of Education and Research (BMBF) and the Bavarian State Ministry of Sciences, Research and the Arts (StMWFK) as well as the partners themselves. By offering a unique suite of high-performance neutron scattering instruments, scientists are encouraged and enabled to pursue research in diverse fields such as physics, chemistry, biology, earth sciences, engineering, material science, or even cultural heritage. Scientists interested in performing experiments with neutrons or positrons are welcome to apply for beam time twice a year by using the MLZ proposal system (

RI Keywords
Positrons, Spectroscopy, Nuclear & particle physics, Neutron diffraction, Imaging & analysis, Industrial & medical applications, Reflectometry, Small angle neutron scattering
RI Category
Intense Neutron Sources
Scientific Domain
Engineering and Energy
Humanities and Arts
Biological and Medical Sciences
Earth and Environmental Sciences
Physics, Astronomy, Astrophysics and Mathematics
Chemistry and Material Sciences
Information Science and Technology
ESFRI Domain
Physical Sciences and Engineering

Support to perform experiments using neutrons or positrons. In addition, a variety of laboratories and user facilities (such as TEM, MBE, AFM, X-ray tomography) are provided.

Science and Innovation with Neutrons in Europe in 2020
Komitee Forschung mit Neutronen (KFN) [Committee Research with Neutrons]
Science and Innovation with Neutrons in Europe
Date of last update: 22/03/2017
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