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Update Instructions

skoupy_r
2023-11-29 17:55:30 +01:00
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Instructions-for-SSB.md

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[Home page](ptychoScopy)
**Single Side Band ptychography** requires due to its principle dense sampling, focused probe and detector cover 1 alfa at least.
Design pipeline:
|Set|Get|Check|
|---|---|----|
|defocus to 0 | | |
|beam energy | contrast transfer function | |
|probe semi-angle | contrast transfer function | spatial frequencies in sample |
|magnification | field of view | |
|scanning matrix | sampling | for atomic resolution around 0.2 - 0.4 A|
|camera length | detector cover| just over 1 alfa, check for recommended |
|dwell time | electron dose | consider binning and maximal detector frame rate |
|probe current | electron dose | compare with sample hardness, is it reasonable for given resolution?|

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Instructions.md Normal file

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[Home page](ptychoScopy)
# SSB
**Single Side Band ptychography** requires due to its principle dense sampling, focused probe and detector cover 1 alfa at least.
Design pipeline:
|Set|Get|Check|
|---|---|----|
|defocus to 0 | | |
|beam energy | contrast transfer function | |
|probe semi-angle | contrast transfer function | spatial frequencies in sample |
|magnification | field of view | |
|scanning matrix | sampling | for atomic resolution around 0.2 - 0.4 A|
|camera length | detector cover| just over 1 alfa, check for recommended |
|dwell time | electron dose | consider binning and maximal detector frame rate |
|probe current | electron dose | compare with sample hardness, is it reasonable for given resolution?|
# Iterative reconstruction
**Iterative reconstruction techniques** allow sparse sampling, both focused and defocused probe, but need to cover densely sampled diffraction patterns to high angles.
Design pipeline:
|Set|Get|Check|
|---|---|----|
|beam energy | contrast transfer function | |
|probe semi-angle | contrast transfer function | spatial frequencies in sample |
|magnification | field of view | |
|scanning matrix + defocus | sampling and overlap | beam size in probe window, overlap > 60 % |
|dwell time | electron dose | binning and maximal frame rate|
|camera length | reconstructed pixel size | pumping aperture limitation, low angle approx., det. cover < 1 alfa, too big probe |
|probe current | electron dose | compare with sample hardness, is it reasonable for given resolution?|