[mesa-users] Increase resolution in surface ionization zones?

[Zhao Guo]

Dear all,
I am a new MESA user.I am trying to generate a model for some
non-adiabatic pulsation studies.

The model profiles generated by the defualt example_astero (with a
mesh_delta_coeff=0.4)in test_suite have ~1600 layers from center to
surface,but they are too coarse in the surface hydrogen and helium
ionization zones.
My goal is to increase the resolution so that hydrogen and helium
ionization zone,especially the He II ionization zone can be resolved.
Is there a good way to do this?

I assume changing mesh_delta_coeff to a smaller value(eg. ~0.1) will
increase the resolutin for the whole star.I looked through the '!mesh
adjustment' in controls.defaults but didn't find any help.

Thank you very much!

best regards,
Zhao