View

This view allows you to plot gx gy gz values of g-vectors. Dots in white are all g-vectors. Dots in green are g-vectors found in the log file. As the log file doesn' t have gx gy gz values, these values comes from the corresponding g-vector file loaded in the view. So be sure to have the good gve file and its corresponding log file.

Description

This view is loaded with a g-vector file from imageD11 generated after transformation. If this view is active and you have a ini file editor opened, validating the field g-vector file in the ini file loads automatically this view with the g-vector file. You can also load a g-vector independant fron an ini file editor,

Screen shot

By default, all g-vectors in the gve file are plotted in white since the option "Show all gvectors" is checked in the view. Here is a screen shot of theorical g-vectors.

Once you have loaded a log file, g-vectors are loaded for this file. They are plotted in green. By default g-vectors of all grains are plotted, and you can choose to plot only one grain in the list box. Here is an example of g-vectors plotted for the grain 3 for simAl20081021_gaelle.47.log file and its corresponding gve file : SimulationAl20081021.2.gve. Here is a screen shot of measured g-vectors in grain 3.

File description

Scattering vectors computed by the transformation module, normally via the guitransformer module... The first line of the file contains the unit cell parameters and lattice centering (one of P,A,B,C,I,F).
The wavelength and wedge angle are expected on the next lines (needed to compute ideal two theta, omega and azimuth angles for computed orientations).
A list of computed d* values expected h,k,l values for the unit cell follow. Note that d* is 1/d-spacing in Angstrom.
The actual scattering vectors follow.
  1. xr x-component of scattering vector (along the beam) with all angles at zero (units 1/Å)
  2. yr y-component of scattering vector (toward the door) with all angles at zero (units 1/Å)
  3. zr z-component of scattering vector (roughly up) with all angles at zero (units 1/Å)
  4. xc spatially corrected peak x-position on detector (units: pixels)
  5. yc spatially corrected peak y-position on detector (units: pixels)
  6. ds 1/d-spacing - modulus of scattering vector - ds = \frac{\lambda}{ 2 \sin \theta}
  7. phi azimuthal angle. Apologies for the typo, it should say eta.
  8. omega Rotation angle of scan

Here is a short sample of an g-vector file.
4.049750 4.049750 4.049750 90.000000 90.000000 90.000000 F
# wavelength = 0.153636
# wedge = 0.000000
# ds h k l
0.427693 -1 1 1
0.427693 -1 1 -1
0.427693 1 -1 1
0.427693 1 -1 -1
0.427693 -1 -1 -1
//
1.209699 -2 4 2
1.209699 -2 -2 4
# xr yr zr xc yc ds eta omega
-1.064488 0.487933 -0.303576 393.350339 967.555462 1.209699 255.401608 -59.865730 0
-0.647861 0.323941 0.382165 659.957013 791.719538 0.818970 297.876500 -59.355276 1
-0.694335 0.422749 -0.099470 473.489709 826.087974 0.818970 263.009860 -55.030765 2
0.277708 -0.258757 -0.586271 285.515284 366.081243 0.698420 147.207272 -52.688612 3
0.601890 -0.616322 -0.690907 242.754491 178.278465 1.104299 128.896483 -50.564083 4
//