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Large dynamic range small-angle diffractometer D22

Small-angle scattering is a technique that measures the deviation to small angles (much less than one degree to several degrees) of an X-ray or neutron beam due to structures of small size in the sample. “Small” means dimensions of a few tenths to about 100 nanometres, such as clusters in alloys, polymers, or biological macromolecules.

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svergun

Svergun programs

The programs

  • ASSA - an interactive modelling program,
  • CRYSOL - a program to evaluate X-ray solution scattering of biological macromolecules from their atomic coordinates,
  • CRYSON - a version of CRYSOL for neutron scattering,
  • DAMMIN - ab inito shape determination by simulated annealing using a single phase dummy atoms model,
  • GNOM - an indirect transform program for small-angle scattering data processing, and
  • SASHA - shape determination using spherical harmonics

by Dmitri Svergun, EMBL Hamburg, are available at the ILL (30-Sep-1999). You can find the official descriptions here.

The programs have been compiled for 64 bit SGI machines. Therefore, please run them on lass1 or lass2 only for the time being.

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The worldwide version of the D22 manual on the ILL web is here. 

 Web document produced by Roland May, ILL Grenoble