transmittivity and reflectivity

[TrumeAAA]

Hi,

How to calculate the transmittivity and reflectivity of a laser pulse after propagating through plasma? Any help or suggestion will be helpful.

Thanks.

[Status-Mirror]

Hi TrumeAAA,

At present, you can't output transmittivity and reflectivity directly, but there are other variables you can output.

• absorption: This outputs the total laser energy injected into the simulation, and the total laser energy which has left the simulation (through all boundaries) by the current time-step
• poynt_flux: This outputs the laser power in each cell, flowing in each direction. By monitoring this on either side of your plasma, you might be able to determine the total energy flowing through each boundary separately.

A full list of the EPOCH output variables can be found here: https://epochpic.github.io/documentation/input_deck/input_deck_output_block.html

Hope this helps, Stuart

[Status-Mirror]

It would be useful if we could save absorption on different boundaries to different variables. I'm going to add an enhancement flag to this chain, and I'll see if it's possible to get this into EPOCH 4.19.

[TrumeAAA]

Thank you for your reply!