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Ivanlh20 / multem

MULTEM is a powerful and advanced collection of C++ routines with CUDA support, designed to perform efficient and accurate multislice simulations for various TEM experiments such as HRTEM, STEM, ISTEM, ED, PED, CBED, ADF-TEM, ABF-HC, EFTEM, and EELS.
GNU General Public License v3.0
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See incident STEM probe used in a simulation? #28

Closed emichr closed 5 years ago

emichr commented 5 years ago

Is there a way to retrieve the incident probe that was used during a STEM simulation? Alternatively, is there a way to reproduce the probe?

Ivanlh20 commented 5 years ago

Check out the example https://github.com/Ivanlh20/MULTEM/blob/master/mex_examples_multem/example_incident_wave_1.m Do not forget to use option 2 to visualize a convergent beam input_multislice.iw_type = 2; % 1: Plane_Wave, 2: Convergent_wave, 3:User_Define, 4: auto

emichr commented 5 years ago

Great, thanks for the quick reply!

I have some further questions however.

If I include the lines input_multislice.iw_type = 2; input_multislice.iw_psi = read_psi_0_multem(input_multislice.nx, input_multislice.ny); in my script before running my STEM simulations, will the input_multislice.iw_psi be used as the input wave for each pixel in the simulation? In other words, if I make changes to input_multislice.iw_psi, and then run my simulation with input_multislice.simulation_type = 11, will the simulation use the wave in input_multislice.iw_psi or will it generate a new incident wave based on the other parameters in input_multislice?

Ivanlh20 commented 5 years ago

if you want to use a user define input wave function, then you have to set

input_multislice.iw_type = 3; % 1: Plane_Wave, 2: Convergent_wave, 3:User_Define, 4: auto

and you have to define your own input wave as a complex matrix as

input_multislice.iw_psi = "Complex matrix";

Check out this example https://github.com/Ivanlh20/MULTEM/blob/master/mex_examples_multem/example_incident_wave_2.m There I use a user define input wave

This option won't take into account the input parameter of the condenser lens.

El vie., 3 may. 2019 a las 16:10, Emil Christiansen (< notifications@github.com>) escribió:

Great, thanks!

If I include the lines input_multislice.iw_type = 2; input_multislice.iw_psi = read_psi_0_multem(input_multislice.nx, input_multislice.ny); in my script before running my STEM simulations, will the input_multislice.iw_psi be used as the input wave for each pixel in the simulation? In other words, if I make changes to input_multislice.iw_psi, and then run my simulation with input_multislice.simulation_type = 11, will the simulation use the wave in input_multislice.iw_psi or will it generate a new incident wave based on the other parameters in input_multislice?

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emichr commented 5 years ago

Ah, of course! Thank you for clearing that up.