LNLS Experimental facilities 15 beam lines in operation : X-Ray diffraction (XRD) Crystallography (MX) Small Angle X-Ray Scattering (SAXS) X-Ray Absorption.

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Presentation transcript:

LNLS Experimental facilities 15 beam lines in operation : X-Ray diffraction (XRD) Crystallography (MX) Small Angle X-Ray Scattering (SAXS) X-Ray Absorption and Fluorescence (XAFS) For our measurements we use 3 beam lines : SAXS1 (Pinhole experiment) Energy Resolution 10% ( keV) 1E12 photons/s Divergence 900 x32 8keV XAFS1 (Energy scan for single pixel calibration) Energy range 4-15 keV Resolution : % Beam Size 1x1 mm2 1e9 photons 7 keV MX1 (Pinhole and Fluorescence calibration) Energy = 7.7keV + harmonics 1e12 photons /s Various targets for calibration

Fluorescence measurements (MX1) TargetCoCrCuFeMnNiTiVZn E (kα) in keV X-Ray beam (7.9,15.8 keV) 1e12 photons/ s Target Fluorescent photons field ~ 1000 single pixel clusters per pixel / 50k frames (1ms integration) -> ~30-45 min per fluo Only tested with one assembly (A06-W0110) but possibility to run multiple assemblies at the same time (Large Fluorescence radiation field ) Timepix+FITPix

Single Pixel TOT Spectrum First Harmonic scattered

Calibration Curve

Single Pixel Energy Spectrum First Harmonic scattered

Application to testbeam data Old CalibrationNew Calibration By Sophie Redford

Application to testbeam data Old CalibrationNew Calibration By Sophie Redford

Impact on resolution Resolution in X, 2 hit cluster: um -> um Resolution in Y, 2 hit cluster: um -> um Resolution in X 4 hit cluster: um -> um Resolution in Y 4 hit cluster: um -> um

Energy Measurements with monochromator (XAFS1) X-Ray incident beam goes to Crystal Monochromator and is then delivered to the experimental area. Energy can be selected with 0.1keV accuracy along the 5-15 keV range. 2 sensors (C04-W0110,D09-W0126) were tested in this beamline to obtain single pixel calibration for a subset of pixel (beam 2.5x3mm2) Analysis on one of the sample will be presented by Mateus Vincente for UFRJ

Single Pixel TOT Spectrum I cant see the 5-8 keV photon peak, Double count peaks are however visible

Global Surrogate Fit