[FLASH-USERS] Regarding ms_targZMin

[Ong Jian Fuh]

After the first email, I played around and find that it is caused by the 
average ionization in sesame module.

FLASH has use Thomas Fermi ionization to model the average ionization 
level at low temperature.

But it is weird that the ionization level at room temperature come with 
al-imx-003.ses or al-imx-003.cn4 doesn't match TF model.

The minimum ionization level is around 0.015 but 0.02 is used instead, 
that is ms_targZmin at work.

But TF gave around 2.4 at room temperature and ms_targZmin is not 
applied. It seems like the code take the maximum value between 
ms_targZmin and data.

My guess is that as long as the average ionization level initiated with 
too large value it is difficult to get laser heating. So other table 
from sesame also dont work.

I appreciate if anyone or from developers can comment about this. Thanks.

Regards,
Ong


On 10/02/2023 12:11 am, Matthew Trantham wrote:
> I am also experiencing similar problems using sesame tables. I cannot 
> get the laser to drive a shock using a sesame table I cut out myself 
> per the example in the manual (although al-imx-003.ses does work 
> in LaserSlab).
>
> I tried the LaserSlab problem in 1D, also using the 3720 table. I see 
> no compression or heating of the Aluminum although there is laser 
> deposition and expansion of the Aluminum. I've attached images of the 
> Ion/Electron temps, Mass Density and Material boundaries, and the 
> Laser Deposition.
>
> Finally, the problem is not constrained to 3720, I've tried a lot of 
> tables and I don't know what I'm doing wrong.
>
>
> On Mon, Jan 30, 2023 at 3:45 AM Ong Jian Fuh <jianfuh.ong at eli-np.ro> 
> wrote:
>
>     Dear FLASH developers,
>
>     I am running FLASH4.7 using SESAME table for aluminum (mat id
>     3720). In LaserSlab par file, ms_targZMin = 0.02. This is fine by
>     using al-imx-003.cn4, where the z_bar shows 0.02 for Targ species.
>     But when I use SESAME table (directly after sesame-extract with
>     opacplot), the z_bar is 2.461 although ms_targZMin = 0.02 is set.
>     What is the reason in this case? What is the difference with
>     sim_zminTarg in config?
>
>     When I use "eos_gam" the z_bar is 13.
>
>     The problem in using SESAME is that there is no heating (I have
>     used BDRY condition), while there is heating using al-imx-003.cn4.
>
>     al-imx-003.cn4:
>
>
>
>     SESAME mat_id 3720
>
>     -- 
>     Regards,
>     Ong
>
>
>
>
>
>     Ong Jian Fuh
>     Extreme Light Infrastructure - Nuclear Physics
>     "Horia Hulubei" National Institute for Physics and Nuclear Engineering
>     30 Reactorului Street, 077125 Magurele (Ilfov), Romania
>     www.eli-np.ro  <http://www.eli-np.ro>
>
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