Import an external laser field ?

[Baptxg]

Hi everyone,
How does one -- or can one -- import a laser field formerly computed from another PIC code ? For instance a field passed by the LASY program to transform it into a (x,t) profile ? If so, with what command ?

Thanks in advance, especially if it's an obvious one, but I couldn't find it in the docs.

Cheers,

[ax3l]

Hi @Baptxg,

Great question, sorry for the sparse docs on this one. We have a selection of examples that show how to use LASY in WarpX here:
https://github.com/ECP-WarpX/WarpX/tree/57931b81ea0efdbfec4bc1f84f789b5188b036ed/Examples/Tests/laser_injection_from_file

Inputs file options are from_file: https://warpx.readthedocs.io/en/latest/usage/parameters.html#laser-initialization

And I think for WarpX Python bindings the APIs are still todo cc @RemiLehe @dpgrote ?

[Baptxg]

Hello @ax3l, thanks a lot for your answer.
After some digging I eventually found the from_file command yes, and it seemed to work well but now, I have a 2D simulation reading the laser from a .h5 file writting by a LASY script, and the laser comes out the antenna very distorted and not at all like in the file exported by Lasy.
I tried matching the grid resolutions between LASY and WarpX, I tried rz, xt and xyt but nothing fixes it.

Any clue what might cause such a distortion ?