MLZ is a cooperation between:

Technische Universität München> Technische Universität MünchenHelmholtz-Zentrum Geesthacht> Helmholtz-Zentrum GeesthachtForschungszentrum Jülich> Forschungszentrum Jülich
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MLZ (eng)

Lichtenbergstr.1
85748 Garching

MIRA

Dual wavelength band instrument

MIRA-1 MIRA-1

MIRA is a dual wavelength band instrument, which provides neutrons over a wide range of wavelengths 3.5 Å < λ < 20 Å combining the two beam ports of MIRA-1 and MIRA-2. The instrument's setup is modular and allows for various different cold neutron experiments such as diffraction, spectroscopy or reflectometry.

The instrument can easily be moved from one port to the other without changing the sample environment. A variety of different setup options can be combined allowing for a fast and flexible realisation of neutron experiments using the options available:

  • Cold diffraction
  • Cold three axes spectroscopy for extreme environments in pressure and temperature
  • Small angle neutron scattering (SANS)
  • Reflectometry
  • MIEZE spin echo
  • 3D-Polarimetry
MIRA-2 MIRA-2

Polarised neutrons are optional for all experimental setups at MIRA. Using the finger detector, the instrument has a very low background of less than 0.1 cps. For MIRA-2 a q-range up to 2.5 Å-1 with an q-resolution of 0.01 Å-1 can be reached. Vertical and horizontal B-fields up to 2.2 T and vertical B-fields up to 7.5 T are available. Temperatures from 50 mK to 1500 K can be applied using the standard sample environment at MLZ.

Typical Applications
  • Dynamics of magentic excitations
  • Determination of magnetic structures, especially large scale structures, i.e. helical spin density waves or magnetic lattices
  • Quasi-elastic measurements in magnetic fields with high resolution
  • Determination of structures and dynamics in extreme environments, like pressure
  • Determination of layer thickness of films, for instance in polymer physics
  • Reflectometry from magnetic multilayers
  • Polarisation analysis
Technical Data

MIRA-1

Primary beam

  • Neutron guide: NL6-N
  • Dimensions: 10 × 120 mm2 (width x height)
  • Curvature: 84 m
  • Coating: sides m = 2, top/bottom m = 2

Monochromator

  • Intercalated HPGO Δλ/λ = 2%
  • Multilayer Δλ/λ ≈ 3 % (5 % polarised)
  • 6 Å < λ < 20 Å

max. differential flux at sample

  • 5 · 105 neutrons s-1 cm-2 at 10 Å
  • 2 · 105 neutrons s-1 cm-2 polarised

Analyzer

  • 2 cavities
  • 2 bender
  • 3He-Spin filter

Detector

  • 20 × 20 cm2 2-D PSD with 1 x 2 mm2 resolution
  • 1 inch 3He finger detector
  • 20 × 20 cm2 2-D PSD, time resolution < 1 ps

MIRA-2

Primary beam

  • Neutron guide: NL6-S
  • Dimensions: 60 × 120 mm2 (width x height)
  • Coating: sides m = 2.0, top/bottom m = 2

Monochromator

  • Horizontal focussing HOPG Δλ/λ ≈ 2 %
  • 3.5 Å < λ < 6 Å

max. differential flux at sample

  • 1 · 107 neutrons s-1 cm-2 at 4.7 Å (2015)
  • 1 · 106 neutrons s-1 cm-2 polarised

Analyzer

  • 2 cavities
  • S-bender, transmission polariser
  • 3He-Spin filter

Detector

  • 20 × 20 cm2 2-D PSD with 1 x 2 mm2 resolution
  • 1 inch 3He finger detector
  • 20 × 20 cm2 2-D PSD, time resolution < 1 ps
  • with low background < 0.1 cps

Instrument Scientist

Dr. Robert Georgii
Phone: +49.(0)89.289.14986
E-Mail:

Dr. Markos Skoulatos
Phone: +49.(0)89.289.14668
E-Mail:

MIRA
Phone: +49.(0)89.289.14877

Operated by

Logo Tum

Publications

Find the latest publications regarding MIRA in our publication database iMPULSE:

impulse.mlz-garching.de

Citation of the instrument

Heinz Maier-Leibnitz Zentrum. (2015). MIRA: Dual wavelength band instrument. Journal of large-scale research facilities, 1, A3. http://dx.doi.org/10.17815/jlsrf-1-21

For citation please always include the DOI.

Gallery

MIRA-1
MIRA-1
MIRA-2
MIRA-2

Instrument MIRA-2 in three axes mode. © W. Schürmann, TUM

MIRA-2
MIRA-2

MLZ is a cooperation between:

Technische Universität München> Technische Universität MünchenHelmholtz-Zentrum Geesthacht> Helmholtz-Zentrum GeesthachtForschungszentrum Jülich> Forschungszentrum Jülich