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processing:workflow_dac_data [2019/02/15 15:18] smerkel |
processing:workflow_dac_data [2020/03/25 09:36] (current) matthias [Workflow outline] |
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* typically, unknown phases and cell parameters, | * typically, unknown phases and cell parameters, | ||
* poor diffraction quality. | * poor diffraction quality. | ||
+ | |||
+ | Obviously, unlike data from simulations, you do not know the answer! You do not know the grains you will be looking! | ||
===== Workflow outline ===== | ===== Workflow outline ===== | ||
Here is a simple outline of what you should do: | Here is a simple outline of what you should do: | ||
- | - Calibrate your experiment. This should be done with either Dioptas or Fit2D. Beam centers and detector distances you find in Dioptas or Fit2D will be used at a later stage of the processing. | + | - Calibrate your experiment. This should be done with either [[software:dioptas|Dioptas]] or [[software:fit2d|Fit2D]]. Beam centers and detector distances you find in Dioptas or Fit2D will be used at a later stage of the processing. |
+ | - Understand the [[dac_experiments:geometry|concept of an O-Matrix]] and figure out your own. | ||
- We often also calibrate [[software:Maud|Maud]] as this point. We will use it later to figure out the cell parameters of our sample. As you start using MAUD keep a note of the parameters you use to convert your tiff images into ESG. You will need to use exactly the same ones on your sample images later. | - We often also calibrate [[software:Maud|Maud]] as this point. We will use it later to figure out the cell parameters of our sample. As you start using MAUD keep a note of the parameters you use to convert your tiff images into ESG. You will need to use exactly the same ones on your sample images later. | ||
- Later, for each P/T point you wish to study | - Later, for each P/T point you wish to study | ||
- | * identify images with double diffraction (where the single-crystal diffraction from the diamond anvil acts as a secondary source) with sufficient intensity to get mixed up with data, delete them, and replace them with either the average of the two surrounding images or create an empty image, | + | * [[processing:remove_bad_images|Remove bad images]] and replace them with either the average of the two surrounding images or create an empty image, |
- | * calculate an average and a median image, | + | * Calculate an average and a median image, |
- | * //Optional//: clean up your images to remove the shadow from the DAC. This step is not always recommended, actually. Shadows do not produce any peaks and shadow removal can introduce many artifacts. | + | * Use MAUD or Dioptas or anything else to identify your phases and their cell parameters. We often work on the average images to do so, |
- | * use MAUD or Dioptas or anything else to identify your phases and their cell parameters. We often work on the average images to do so, | + | * [[processing:clean-diamond-anvil-cell-data|Clean up your data]] for diamond diffraction spots, DAC shadows, etc |
- | * | + | * [[processing:search_for_peaks|Search for peaks]], |
+ | * [[processing:compute_gvectors|Calculate your G-Vectors]], | ||
+ | * [[processing:indexing_with_grainspotter|Index your grains with GrainSpotter!]] | ||
+ | * [[processing:peakremoval|Treat side phases first (e.g. pressure medium, pressure marker, other phases)]] | ||
+ | * ... | ||
+ | |||
+ | {{:processing:general_data_processing_flow_chart_.png?600|Data processing flow chart}} |