Beamline

• Scientific Applications
  • SAXS/WAXS
  • Solution Scattering
  • Fiber diffraction
  • Anomalous SAXS
• Source characteristics
  • Bending Magnet Port 6A
  • Electron Beam energy 1.3 GeV
  • Dipole field 1.48 T
  • Characteristic energy 1.66 keV
• Optics
  • LNLS double crystal monochromator
  • Si 111 and Ge 220 crystals
  • Practical energy range from 3 to 14 keV
  • Distance from source
  • Acceptance 2 mrad
  • Energy resolution dE/E
  • Flux before pinholes = 7 x 10⁹ @ 8keV
  • Flux at sample =
• Experimental setup
  • 2D control for sample alignment and change
  • Mettler hot stage
  • Linkam shear cell
• Detection
  • Gabriel type 2D multi-wire gas proportional counter
    • Gabriel type 2D multi-wire gas proportional counter
    • 200 mm active diameter
    • 1024 x 1024 array
    • Photodiode at beam stop
    • Detector resolution 200 – 250 μm FWHM @ 8keV
    • q range from .0015 to .44 Å^-1
  • Image Plate and Scanner
    • 50, 100, or 200 μm pixel size
    • 4000 x 5000 maximum pixel array
    • Q range from .04 to 2.0 Å^-1
• Camera
  • 3 pinhole .2, .4, and .8 mm diameter
  • Vacuum flight path sections allow sample to detector distance of .9m to 4.9m
• Other Equipment
  • X-ray Eye
  • Two ion chambers for flux monitoring
  • Optical laser to aid sample alignment (in progress)
• Software
  • SAXSGUI from Rigaku
  • Igor Pro from Wavemetrics
  • Irena 2 package for Igor Pro
  • FIT2D