Changes between Initial Version and Version 1 of Ticket #1086, comment 4


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Timestamp:
May 22, 2018 10:27:26 AM (7 years ago)
Author:
dirk
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  • Ticket #1086, comment 4

    initial v1  
    1 The weights for the polarisation efficiencies of the instrument act on intensities, i.e. remove the square rooted weights from `sascalc/calculator/c_extensions/libfunc.c:cal_msld` and add in `sasview\src\sas\sascalc\calculator\c_extensions\sld2i.c:genicomXY` the proper weight for Iout derived as the sum of the spin-resolved scattering cross-sections. 
     1The weights for the polarisation efficiencies of the instrument act on intensities, i.e. remove the square rooted weights from `sascalc/calculator/c_extensions/libfunc.c:cal_msld` and add in `sasview\src\sas\sascalc\calculator\c_extensions\sld2i.c:genicomXY` the proper weight for Iout derived as the sum of the spin-resolved scattering cross-sections.  
     2Concerning the weights, make sure that these are polarisation efficiencies, i.e. for the incoming side `eff_u=(1+up_i)/2` and `eff_d=(1-up_i)/2` and not polarisations `up_i` or `up_f`. I assume that will also introduce proper weights such that one can reconstruct from POLARIS cross sections the SANSPOL and unpolarised cross sections with correct absolute intensities.