[FLASH-USERS] Unexpectedly Low Zbar Values Despite High Ion Temperatures - EOS Problem

[Owen Bardeen]

Hello all,

I'm encountering an issue with Zbar values in my FLASH simulation and would
appreciate any help.

I've set up a LaserSlab simulation with a spherical target. When I check
the output files, plotting tion, nion, and average ionization (determined
as ye/sumy according to page 587 of the user manual), I see average
ionization is orders of magnitude different from what I expect from looking
at the EOS tables (checking the Zbar corresponding to the tion and nion I
see in my output) I give to FLASH.

I've confirmed that:

   -

   The Zbar values in the table are physically reasonable.
   -

   Ion temperature and density in the relevant regions match the expected
   range.
   -

   I'm plotting Zbar from the simulation’s checkpoint or plot files, not
   the raw EOS data.

I’m wondering if this might be due to:

   -

   FLASH not reading or using the Zbar in my IONMIX properly?
   -

   Something I'm missing with differences in the units?
   -

   Weird interpolation of Zbar done by FLASH?

If anyone has experience debugging EOS/Zbar behavior in FLASH, I’d be
grateful for any suggestions.

For reference, I am using the LaserSlab module, FLASH4.7.1. My EOS tables
are generated using Propaceos software.

Thanks in advance for your help,
Owen
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