The Renaissance of Neutrograph T. Pirling Institut Laue Langevin INSTITUT MAX VON LAUE - PAUL LANGEVIN Camera Obscura INSTITUT MAX VON LAUE - PAUL LANGEVIN INSTITUT MAX VON LAUE - PAUL LANGEVIN Strain imager (Railway-head, Webster, Hughes, ILL) INSTITUT MAX VON LAUE - PAUL LANGEVIN G B D g b Magnification : b/g Light efficiency : D/b Blurr : D*(b+g)/g INSTITUT MAX VON LAUE - PAUL LANGEVIN Sketch from 17th century Neutron Imaging SIZE (CM) L/D Flux 1 x 106 s-1 cm-2 CONRAD2@HZB (cold) 10 500 5.8 ANTARES@FRM2 (cold) 40x40 400 100 ICON@PSI (cold) 40 600 3.4 Neutrograph@ILL 20 150 3000* INSTITUT MAX VON LAUE - PAUL LANGEVIN Neutrograph Flux : 3 109 n cm-2 s-1 field of divergence view (deg) (mm) D (mm) L/D 1.5 130 Blurr at detector distance (mm): 50 100 200 1 5000 0.01 0.02 0.04 5 1000 0.05 0.1 0.2 20 250 0.2 0.4 0.8 INSTITUT MAX VON LAUE - PAUL LANGEVIN Neutron radiography at ILL pre 2010 Electrically driven four-piston BMW engine Universität Heidelberg, Paul-Scherrer-Institut and TU München NEUTROGRAPH at ILL Grenoble flux of 3*109 n/cm2s and a collimation of L/D=140. INSTITUT MAX VON LAUE - PAUL LANGEVIN First experiment Pb, protected by 5mm borated rubber Boronated polyethylene B4C-window 50x50mm2 Pb Scintillator screen Fast shutter 70 mm Sample positions Pb CCD camera Aperture, B4C Fritte plus Pb (alternative Positions between here and camera) Pb (between 2 and 50 mm in diameter) INSTITUT MAX VON LAUE - PAUL LANGEVIN First experiment INSTITUT MAX VON LAUE - PAUL LANGEVIN First experiment INSTITUT MAX VON LAUE - PAUL LANGEVIN Neutrograph 10m INSTITUT MAX VON LAUE - PAUL LANGEVIN Neutrograph 14m50 INSTITUT MAX VON LAUE - PAUL LANGEVIN Immediate solution -Improvements of biological shielding and operation / safety -Installation of xyz- and rotation stage -Optical bench for flexible set-up -Szintillator screens -Variable collimator -> High flux = fast, medium resolution Radiography/Tomography station INSTITUT MAX VON LAUE - PAUL LANGEVIN SALSA –today! High resolution, multiphase materials (case hardened steel wind turbine bearing) radial strain 8000 7000 radial Fe(110) collimator strain / 1-^-6 6000 5000 4000 3000 2000 1000 0 -10 -8 -6 -4 position / mm -2 0 INSTITUT MAX VON LAUE - PAUL LANGEVIN Stress mapping in extremely large components Dissimilar weld austenitic INCONEL ferritic INSTITUT MAX VON LAUE - PAUL LANGEVIN Texture imaging Ferritic Buttering Weld INSTITUT MAX VON LAUE - PAUL LANGEVIN austenitic Super SALSA INSTITUT MAX VON LAUE - PAUL LANGEVIN Next generation strain scanner Time of flight Monochromatic (SALSA) Continuous white beam Whole diffractogram 1 diffraction peak at a time At least large part of diffractogram Duty cycle 6% (POLDI) Reflectivity of crystal monochromator 60% Reflectivity of crystal analyser 60% Large detector coverage possible Detector coverage limited to typ. 5° x 15° in 2q Large analyser/detector coverage possible 2 strain components available 1 strain component available 2 strain components available Good focalisation of prim. White beam needed Monochromatic beam is focalised on sample (~20mm) Good focalisation of prim. white beam needed High activation of sample Low activation of sample Even higher activation of sample Efficiency depends mainly on focalisation of prim. beam INSTITUT MAX VON LAUE - PAUL LANGEVIN TOMO and SUPER-SALSA Strain/stress imaging water intake in rocks, medical implants Manipulation of large samples Follow dynamic processes (i.e. water, paint etc intake) Bragg edge technique: texture imaging in engineering components, fast strain mapping Cultural heritage objects Wavelength selective imaging Texture imaging in engineering components, fast strain mapping PGNAA with lateral resolution Stresses, built up during solidification Fast tomography to follow in-situ dynamic processes in 3D Heat treatment Tensile testing Variable beam size in both parallel beam and focusing beam geometries Multiphase materials, i.e. dissimilar welds INSTITUT MAX VON LAUE - PAUL LANGEVIN Next generation strain scanner INSTITUT MAX VON LAUE - PAUL LANGEVIN
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