How to save result in .h5?

[kli-jfp]

Hello,
I am running some examples on the WarpX page and things are running smoothly. However, I am having a hard time finding how to save the results in .h5 file format. Maybe I missed a specific build option that needs to be turned on or something that needs to be added to the input decks. Thanks!

[ax3l]

Hi @kli-jfp, I am so sorry we overlooked your post.

We implement HDF5 (and ADIOS2) formats through our openPMD [1] backend in the full diagnostics.

As of WarpX 22.12, you add for your respecive <diag_name> the lines

<diag_name>.format = openpmd
<diag_name>.openpmd_backend = h5  # default is bp for ADIOS output; h5 is for HDF5

to the inputs file.

We will make the first line the default in or user-facing examples.

You don't need to add a specifc build option, since we configure by default with -DWarpX_OPENPMD=ON.