Hi!
I am very new to Festim and am struggling to find documentation on whether I can use this program to get permeability, diffusivity, solubility and trap parameters from a dataset. Is this a capability that Festim provides? If so could someone please point me in the right direction? Thank you
Hi @Gav and welcome to the FESTIM community!
I would need some more details about your use case. I’m assuming you have experimental data say from a TDS experiment and you want to get material properties (trap properties in this example) from this.
You need to use FESTIM to solve an inverse problem.
You can follow our tutorial Fit a TDS spectrum which explains how to perform parametric optimisation to identify parameters from an experimental dataset.
Hope this helps!
Hi @remidm!
Thank you so much for replying 
I have experimental permeation data! So its a little different than TDS, we have a flow rate of deuterium through a sample at known temperatures and pressures. I’ll look over the TDS section but I suspect it won’t be helpful in my case. Please correct me if I’m wrong.
Best,
Gavin
You can apply the exact same principle to permeation experiments. You want to fit an experimental curve with a FESTIM-predicted curve and identify material properties.
In the case of permeation data it’s even easier than TDS since the problem is usually simpler.
You can find the permeation tutorial here
Happy to assist you if you can provide more details
@Gav have you been able to get started? Happy to provide more guidance if needed