Changeset 2f539b2 in sasview

Ignore:
Timestamp:
May 16, 2018 5:35:45 AM (7 months ago)
Branches:
ESS_GUI, ESS_GUI_Invariant, ESS_GUI_Pr_fixes, ESS_GUI_batch_fitting, ESS_GUI_iss879, ESS_GUI_iss959, ESS_GUI_ordering
Children:
085e3c9d
Parents:
d1fa2b8
Message:

Updated documentation for generic sans calculator

Location:
src/sas/qtgui/Calculators/media
Files:
2 edited

Legend:

Unmodified
 r417c03f Assuming that all the pixel sizes are the same, the elastic scattering intensity from the particle is intensity from the particle is defined as .. image:: gen_i.png the position of the $j^\text{th}$ pixel respectively. The total volume $V$ The total volume $V$ is equal to .. math:: density * Avogadro number) for the atomic structures). $V$ can be corrected by users. This correction is useful especially for an atomic structure (such as taken from a PDB file) to get the right normalization. *NOTE! $\beta_j$ displayed in the GUI may be incorrect but this will not affect the scattering computation if the correction of the total volume V is made.* $V$ can be corrected by users (input parameter Total volume). This correction is useful especially for an atomic structure (such as taken from a PDB file) to get the right normalization. *NOTE! $\beta_j$ displayed in the GUI may be incorrect (input parameter solvent_SLD) but this will not affect the scattering computation if the correction of the total volume V is made.* The scattering length density (SLD) of each pixel, where the SLD is uniform, is .. image:: mxp.png .. image:: myp.png .. image:: mzp.png .. image:: mqx.png .. image:: mqy.png Here the $M0_x$, $M0_y$ and $M0_z$ are the $x$, $y$ and $z$ Here the $M_{0x}$, $M_{0y}$ and $M_{0z}$ are the $x$, $y$ and $z$ components of the magnetisation vector in the laboratory $xyz$ frame. .. .. image:: Mxyzp.png .. ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ -------------- .. image:: gen_gui_help.png After computation the result will appear in the *Theory* box in the SasView .. figure:: gen_gui_help.png .. 1) Load .sld, .txt, or .omf datafile 2) Select default shape of sample 3) Draw magnetization with arrows (not recommended for a large number of pixels). 4) Ratio of (+/total) neutrons after analyser 5) Ratio of (+/total) neutrons before sample 6) Polarization angle in degrees 7) Default volume calculated from the pixel info (or natural density of pdf file) 8) Compute the scattering pattern 9) Reset GUI to initial state 10) Display mean values or enter a new value if enabled 11) Save the sld data as sld format .. After computation the result will appear in the *Theory* box in the SasView *Data Explorer* panel. of neutrons before the sample and at the analyzer, respectively. *NOTE 1. The values of* Up_frac_in *and* Up_frac_out *must be in the range *NOTE 1. The values of Up_frac_in and Up_frac_out must be in the range 0.0 to 1.0. Both values are 0.5 for unpolarized neutrons.* *NOTE 3. For the nuclear scattering length density, only the real component is taken account.* is taken into account.* .. ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ where $v_j \beta_j \equiv b_j$ is the scattering length of the $j^\text{th}$ atom. The calculation output is passed to the *Data Explorer* length of the $j^\text{th}$ atom. .. The calculation output is passed to the *Data Explorer* for further use. .. image:: pdb_combo.jpg .. figure:: pdb_combo.png .. 1) PDB file loaded 2) disabled input for *Up_frac_in*, *Up_frac_oupt*, *Up_theta* 3) option to perform the calculations using "Fixed orientations" (2D output) or "Averaging over all orientations using Debye equation" (1D output). This choice is only available for PDB files. .. ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ