Set Data Directory so that Set Data Directory so that GRASP knows where to look for GRASP knows where to look for datadata

-FileFile- Set Data DirectorySet Data Directory

- Then browse to data Then browse to data folderfolder

Use -Use - Foreground:Foreground:& Data Load:& Data Load:

- Only use this tag for loading Only use this tag for loading datadata- Type number on Numor(s) lineType number on Numor(s) line

First part of SANS data treatment –First part of SANS data treatment –

Correct for Detector EfficiencyCorrect for Detector Efficiency

Using a scattering substance that scatters uniformally across Using a scattering substance that scatters uniformally across the detectorthe detector

For this use HFor this use H22OO

Zoom in around beam transmissionZoom in around beam transmissionPress this icon and drag around beamPress this icon and drag around beam

Press Centre CalcPress Centre CalcDefines Beam Centre Defines Beam Centre CoordinatesCoordinates

Press Te CalcPress Te CalcCorrects for absorbanceCorrects for absorbance

Press Ts CalcPress Ts CalcCorrects for absorbanceCorrects for absorbance

Check box to subtract Check box to subtract empty cellempty cell Check box to subtract Check box to subtract

cadmiumcadmium

Mask edge of the Mask edge of the detector and region detector and region behind the beam stopbehind the beam stop

Check box to correct the Check box to correct the datadata

Check box to correct for Check box to correct for solid anglesolid angle

Check box to correct for Check box to correct for instrument setupinstrument setup

Calibrates data to water Calibrates data to water scattering intensityscattering intensity

Check box to correct Check box to correct detector efficiencydetector efficiency

Converts data absolute Converts data absolute unitsunits

Open window for radial Open window for radial regroupingregrouping

Second part of SANS data treatment –Second part of SANS data treatment –

Subtract buffers and correct for absorbance and detector Subtract buffers and correct for absorbance and detector efficiencyefficiency

Calculate beam centre Calculate beam centre for sample datafor sample data

Transmission of bufferTransmission of bufferTransmission of sampleTransmission of sample

Check box to subtract Check box to subtract BufferBuffer Check box to subtract Check box to subtract

cadmiumcadmium

Check box to correct the Check box to correct the datadata