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
B G D b g Magnification : b/g Light efficiency : D/b Sketch from 17 th century Blurr : D*(b+g)/g INSTITUT MAX VON LAUE - PAUL LANGEVIN
Neutron Imaging SIZE (CM) L/D Flux 1 x 10 6 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 10 9 n cm -2 s -1 field of divergence view Blurr at detector distance (deg) (mm) D (mm) L/D (mm): 50 100 200 1.5 130 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*10 9 n/cm 2 s and a collimation of L/D=140. INSTITUT MAX VON LAUE - PAUL LANGEVIN
First experiment Pb, protected Boronated polyethylene by 5mm borated rubber B 4 C-window 50x50mm 2 Pb Scintillator screen Fast shutter 70 mm Sample positions Aperture, B 4 C Pb Fritte plus Pb Pb (alternative Positions between here and camera) (between 2 and 50 mm in diameter) CCD camera 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 Stress mapping in extremely large (case hardened steel wind turbine bearing) components radial strain 8000 radial Fe(110) 7000 collimator 6000 strain / 1-^-6 5000 4000 3000 2000 1000 0 -10 -8 -6 -4 -2 0 INSTITUT MAX VON LAUE - PAUL LANGEVIN position / mm
Dissimilar weld austenitic INCONEL ferritic INSTITUT MAX VON LAUE - PAUL LANGEVIN
Texture imaging Ferritic Buttering Weld austenitic INSTITUT MAX VON LAUE - PAUL LANGEVIN
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 Reflectivity of crystal analyser monochromator 60% 60% Large detector coverage Detector coverage limited to Large analyser/detector typ. 5° x 15° in 2 q possible coverage possible 2 strain components available 1 strain component available 2 strain components available Good focalisation of prim. Monochromatic beam is Good focalisation of prim. White beam needed focalised on sample (~20mm) 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 Cultural heritage objects in engineering components, fast strain mapping Texture imaging in engineering Wavelength selective imaging components, fast strain mapping PGNAA with lateral resolution Stresses, built up during solidification Fast tomography to follow in-situ Heat treatment dynamic processes in 3D Tensile testing Variable beam size in both parallel Multiphase materials, i.e. dissimilar beam and focusing beam geometries welds INSTITUT MAX VON LAUE - PAUL LANGEVIN
Next generation strain scanner INSTITUT MAX VON LAUE - PAUL LANGEVIN
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