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Technical information Echidna

Technical information - Echidna

Instrument                     Specifications
Monochromator area
  • Wavelength range 1x10-10m to 3x10-10m
  • Variable monochromator take-off angle between 90o and 140o
  • Ge 115 monochromator, sagittal focusing with fixed radius - 24 crystal slabs
  • Ge 335 monochromator, [1 -1 0] vertical allowing for asymmetric reflections, variable sagittal focusing
  • - 23 crystals of 12 mm high x 50-70 mm wide x 8mm thick
  • - variable focusing between flat and Rcurvature = 1 m
  • - common reflections will be 331, 335, 337 ... hhl
  • Kinematic mount for easy changing
Primary Collimator
  • Selection of three options: 5', 10', open (~12-36' depending on the wavelength).
Secondary Collimator
  • 10' or natural divergence (~20-40' depending on the selected reflection).
Sample area
  • Max. beam size is 20 mm wide by 50 mm high
  • Sample rotation of 360o
  • X-y stage with 20 mm travel in each direction.
  • Sample cross tilt stage of +/- 20°
  • Variable monochromator to sample position of 2.5, 3.0, and 3.5 m.
Detector
  • 128 linear position sensitive detectors of 25 mm diameter x 300 mm high
  • 128 collimators with 5' collimation and 15mm wide and 300mm high
Typical Scan Time
  • 1-6 hours depending on sample composition and size and selected instrument configuration

 Instrument location: Neutron-guide hall, thermal guide TG-1

Instrument reference

Echidna: K.-D. Liss, B. A. Hunter, M. E. Hagen, T. J. Noakes and S. J. Kennedy, Physica B 385-386, 1010-1012 (2006).