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==HRXRD==
==HRXRD==
The HRXRD package is used for analysis of crystalline materials. It can be used to derive information about crystallinity, strain, composition, and thickness. Meaning that HRXRD are used with rocking curves and reciprocal space mapping data. Like the XRR plugin, the flow is to load data, generate a model of the layers, simulate initial parameters, and finally fit the to the data.
The HRXRD package is used with rocking curves and reciprocal space mapping data to derive information about crystallinity, strain, composition, and thickness. These measurements are usually made on epitaxial layers and single-crystal substrates. Like the XRR plugin, the flow is to load data, generate a model of the layers, simulate initial parameters, and finally fit the model to the data.


===Rocking Curve===
===Rocking Curves===
Three modes are available for Rocking Curve analysis: Evaluation and Fit, Evaluation, or Fit. The procedure differs only slightly from one to the other
Three modes are available for Rocking Curve analysis: ''Evaluation and Fit'', ''Evaluation'', or ''Fit''. The procedure differs only slightly from one to the other.
*Load data:
'''How to analyze Rocking Curves:'''
*Configure sample model:
# Load data:
**Set substrate material and initial values.
# Configure sample model:
**Add layers. Consider adding interface layers like native oxides.
##Set substrate material and initial values.
**Set layer materials and initial values.
##Add layers. Consider adding interface layers like native oxides.
**Define Graded Layers if any.
##Set layer materials and initial values.
**Define Super Lattices if any.
##Define Graded Layers if any.
**Link layers, formula is of the type th[1], for linking thickness to layer L1.
##Define Super Lattices if any.
*Set peak parameters and Evaluate:
##Link layers (formula is of the type th[1], for linking thickness to layer L1)).
**Associate peaks with layers or substrate.
#Set peak parameters and Evaluate:
**Select if the peak is a Bragg Peak or a Harmonic peak.
##Associate peaks with layers or substrate.
**For Harmonic peaks chose the harmonic order.
##Select if the peak is a Bragg Peak or a Harmonic peak.
**When done press Evaluate to update fitting parameters.
##For Harmonic peaks chose the harmonic order.
*Set X-ray parameters:
##When done press Evaluate to update fitting parameters.
**Check values for wavelength and reflection.
#Set X-ray parameters:
*Set simulation parameters:
##Check values for wavelength and reflection.
**Select the scan type and the range for simulation.
#Set simulation parameters:
**Click Auto in Horizontal transform to align the offset in 2θ.
##Select the scan type and the range for simulation.
**In Vertical transform, chose the background type and click auto to add a background function to the simulation.
##Click Auto in Horizontal transform to align the offset in 2θ.
**Optional add the some of the values as fitting parameters.
##In Vertical transform, chose the background type and click auto to add a background function to the simulation.
*Set fit algorithm and Run Fit
##Optional add the some of the values as fitting parameters.
**Select the Fit method, Generic Algorithm is for global optimization, while the two others are local optimizations.
#Set fit algorithm and run tit
**Change fit method parameters and settings as needed.
##Select the Fit method. Genetic Algorithm is for global optimization, while the two others are local optimizations.
**If wanted set an instrumental function in the tab below the fit parameters window.
##Change fit method parameters and settings as needed.
##If wanted set an instrumental function in the tab below the fit parameters window.


===Reciprocal Space Mapping===
===Reciprocal Space Mapping===
For RSM data analysis use the RSM flow in the HRXDR plugin.
For RSM data analysis use the RSM flow in the HRXDR plugin.
*Load data:
'''How to fit RSM data:'''
**On the chart toolbar, plot options can be change, of note it is possible to change between angular and reciprocal space coordinates.
#Load data:
*Smoothing and background subtraction:
##On the chart toolbar, plot options can be change, of note it is possible to change between angular and reciprocal space coordinates.
**The data can be smoothed, by weighted average of nearby neighbors.
#Smoothing and background subtraction:
**Background subtraction either in the form of a fitted background or a constant value is possible.
##The data can be smoothed, by weighted average of nearby neighbors.
*Search peaks
##Background subtraction either in the form of a fitted background or a constant value is possible.
**Chose the settings for peak search.
#Search peaks
**Verify the Peaks for Evaluation list.
##Chose the settings for peak search.
*Configure sample model:
##Verify the Peaks for Evaluation list.
**Set substrate material and initial values.
#Configure sample model:
**Add layers. Consider adding interface layers like native oxides.
##Set substrate material and initial values.
**Set layer materials and initial values.
##Add layers. Consider adding interface layers like native oxides.
**Define Graded Layers if any.
##Set layer materials and initial values.
**Define Super Lattices if any.
##Define Graded Layers if any.
**Link layers, formula is of the type th[1], for linking thickness to layer L1.
##Define Super Lattices if any.
*Generate hkl:
##Link layers, formula is of the type th[1], for linking thickness to layer L1.
**Set the rotation angle, ϕ, of the substrate.
#Generate hkl:
**Set the tilt of the substrate, χ, for an in-plane measurement, it is called 2θχ.
##Set the rotation angle, ϕ, of the substrate.
**Adjust the other parameters as wanted.
##Set the tilt of the substrate, χ, for an in-plane measurement, it is called 2θχ.
**Press generate hkl.
##Adjust the other parameters as wanted.
For more information on how to use the HRXRD plugin, read the manual by clicking on the ? in the software or from [http://labmanager.dtu.dk/view_binary.php?fileId=4242 LabManager]  - requires login.
##Press "generate hkl".
For more information on how to use the HRXRD plugin, read the manual by clicking on the ? in the software or find it in [http://labmanager.dtu.dk/view_binary.php?fileId=4242 LabManager]  - requires login.


===RS viewer===
===RS viewer===
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