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Dec 8 – 10, 2020 Online only
Online event
Europe/Berlin timezone

Epsilon - german time-of-flight high resolution neutron diffractometer at the high flux pulsed reactor IBR-2: current status and scientific applications

Dec 10, 2020, 2:15 PM
Online event

Online event

Talk DN: Instrumentation DN2020: Instrumentation


Dr Birgit Müller (Karlsruhe Institute of Technology)


The TOF diffractometer Epsilon at the beamline 7a of the IBR-2 reactor is dedicated to the high resolution measurements of applied and residual strains of geological samples and functional materials.
A four-axis goniometer permits a rotation around one axis and translation in 3 mutual perpendicular directions. It allows us to measure a strain profile of six independent component of strain tensor. Last years Epsilon had been equipped by variety of dedicated sample environment:
- uniaxial pressure device with possibility of sample rotation under external load with maximal pressure up to 150 MPa for operando measurements;
- an acoustic emission system;
- a laser extensometer for macroscopic deformation measurements of the sample with a resolution of 0.5 μm,
- a triaxial pressure device for operando stress measurements, which allows us in situ determination of Poisson ratio, the bulk modulus and Biot-Willis coefficient.
Epsilon is perfect fitted to the geological application and material sciences, the sample environment is unique and has no analogy through the neutron spectrometers in the world.

Primary authors

Prof. Frank Schilling (Karlsruhe Institute of Technology) Dr Birgit Müller (Karlsruhe Institute of Technology) Dr Vadim Sikolenko (Karlsruhe Institute of Technology)

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