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  • License: Freeware
  • Last update: 5 years ago
  • Total downloads: 166
  • Price: Free |
  • Operating system: Win All
  • Publisher: Joachim Kohlbrecher
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windows default iconSASfit Publisher's description

SASfit has been written for analyzing and plotting small angle scattering data.

SASfit has been written for analyzing and plotting small angle scattering data. It can calculate integral structural parameters like radius of gyration, scattering invariant, Porod constant. Furthermore it can fit size distributions together with several form factors including different structure factors. Additionally an algorithm has been implemented, which allows to simultaneously fit several scattering curves with a common set of (global) parameters. This last option is especially important in contrast variation experiments or measurements with polarised neutrons. The global fit helps to determine fit parameters unambiguously which by analyzing a single curve would be otherwise strongly correlated. The program has been written to fulfill the needs at the small angle neutron scattering facility at PSI (kur.web.psi.ch). The numerical routines have been written in C whereas the menu interface has been written in tcl/tk and the plotting routine with the extension blt.

What's New in This Release:

В· bug fix in the model "Stacked Discs". The structure factor describing the stacking order contained a bug.
В· extended plugin for stroboscopic measurements, especially for TISANE
В· plotting: ignore negative y values on log() and sqrt() scales
В· included Pcs_homogeneousCyl form factor
В· bug fix of ferrofluid plugin
В· added radial averaged form factor in ferrofluid plugin
В· extended the spline plugin to be used also as form factors.
В· In case somebody wants to fit a spine function to e.g. a TEM size distribution, this function need to be available as a form factor and not only as a size distribution.
В· added configuration file 'config.ini' as replacement for deprecated sasfit_init_public.tcl
В· added switch for disabling 'about' popup at start time via config file
В· added checkbox (ascii options) for ignoring zero(0) intensity at the beginning of data
В· removed , as data column separator
В· added substitution of , => . for data columns (german decimal format to english format)
В· added interface function for covari...

System Requirements:

No special requirements.
Program Release Status: New Release
Program Install Support: Install and Uninstall

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