[FLASH-USERS] Regarding ms_targZMin

[Adam Reyes]

Hi Ong,

The *imx*.ses files that are included with FLASH are converted from the
ionmix tables with the same names, so the ionization table in
al-imx-003.ses is the same as al-imx-003.cn4. That being said, when FLASH
uses sesame type tables it won't look at the ionization table in sesame and
instead uses TF.

To my knowledge many of the publicly available sesame tables don't include
any of the ionization tables (the 504/601 series). The 3720 table I have
doesn't include them.

Another option for ionization tables is with TOPS
<https://aphysics2.lanl.gov/apps/>. FLASH4.7 includes a reader for TOPS in
the Opacity materialProperties unit, but the tables themselves don't
have any EoS information, and so the ionizations would need to be merged
with other tabulated EoS somehow.

*************************************************************************
Adam Reyes

Code Group Leader, Flash Center for Computational Science
Research Scientist, Dept. of Physics and Astronomy
University of Rochester
River Campus: Bausch and Lomb Hall, 369
500 Wilson Blvd. PO Box 270171, Rochester, NY 14627
Email adam.reyes at rochester.edu
Web https://flash.rochester.edu
 (he / him / his)

*************************************************************************

On Fri, Feb 10, 2023 at 3:56 AM Ong Jian Fuh <jianfuh.ong at eli-np.ro> wrote:

> 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), Romaniawww.eli-np.ro
>>
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>>
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>>
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