[FLASH-USERS] "Vacuum" on both sides of target for LaserSlab?

[Xu Zhao]

Hi David,

If you want to add some space behind the target (see attached) compared to
the Laserslab default,

I think just increasing ymax (the box length if you run in 2d) in the .par
will work.

Usually the *Simulation_initBlock.F90* defines the "blocks (cells)" in the
simulations.

For example line 100 - line 129 in the *Simulation_initBlock.F90 *define
which part is the "target" species and the other is "Cham".

You do not need to modify other files as they define the variables (like "
sim_targetHeight") and material files ("like eos file").

Hope this helps,
Xu


On Tue, 17 Jun 2025 at 22:17, David Montgomery <dsmont80 at gmail.com> wrote:

> Hi All,
>
> Another FLASH-newbie question. I’ve successfully run the LaserSlab
> example, and made some small modifications in my own *.par file.
>
> If I want to add a “chamber gas” region (low density Helium) to the rear
> side of the target (surface NOT irradiated by the laser), in addition to
> the front side of the target, which files do I need to modify besides just
> the *.par file?
>
> Do I have to modify one or more of the local *.F90 files?
>
> Or can I use the same “species” (Cham) on both the rear and front side of
> the “target” species?
>
> Any advice would be very helpful.
>
> Thanks,
> David Montgomery
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-- 
Xu Zhao
PDRA
York Plasma Institute
School of Physics, Engineering and Technology
University of York
York YO10 5DQ, UK
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