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<p class="MsoNormal"><span style="font-size:11.0pt">Hello,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Those r### variables are the specific radiation energies (erg / g) in each radiation group (e.g., r001 is for group 1, r002 for group 2, etc.).<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">You have to do a little bit of math to get nele and nion from the mass density and other variables. In the chk output (or in plt output if you add the appropriate plot_var’s), you can use ‘ye’ and ‘sumy’ like
this:<br>
<br>
nion = dens*sumy*Na<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">nele = dens*ye*Na<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">where Na is Avogadro’s number.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">--</span><span style="font-family:"Calibri",sans-serif;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial",sans-serif;color:#181A1B">Eddie Hansen</span><span style="font-family:"Calibri",sans-serif;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial",sans-serif;color:#181A1B">Applications Group Leader<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial",sans-serif;color:#181A1B">Flash Center for Computational Science</span><span style="font-family:"Calibri",sans-serif;color:black"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span style="font-size:12.0pt;color:black">From:
</span></b><span style="font-size:12.0pt;color:black">flash-users <flash-users-bounces@flash.rochester.edu> on behalf of Yun Hu <huyun@mail.ustc.edu.cn><br>
<b>Date: </b>Monday, June 16, 2025 at 5:59 AM<br>
<b>To: </b>flash-users@flash.rochester.edu <flash-users@flash.rochester.edu><br>
<b>Subject: </b>[FLASH-USERS] 0A373464@6C91B665.8DE94F68<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:10.5pt;font-family:"Lucida Grande",sans-serif;color:black">Dear FLASH code users:</span><span style="font-size:10.5pt;font-family:"Lucida Grande",sans-serif"><o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:10.5pt;font-family:"Lucida Grande",sans-serif;color:black"> I am just a beginner to FLASH code. I plan to use FLASH code to simulate laser ablation X-ray emission. I put the r### in the
plot_var list, so I can get the radiation information.<br>
The question is that, Is r### the distribution of X-ray emission? I wonder that. What I want is the X-ray intensity, But From the simulation result, I doubt whether this is the X-ray intensity. The result as follow is a laser beam irradiate the Al slab
at an angle of 45°</span><span style="font-size:10.5pt;font-family:"MS Gothic";color:black">，</span><span style="font-size:10.5pt;font-family:"Lucida Grande",sans-serif;color:black"> the coordination is cylindrical . this is the beginning of the ablation.
It seems the r003 is very weak at the spot location, and this is against the intuition. I also present the other pictures at different time, It seems the radiation is diffusing with the time. I don't know how to understand the physic explanation.<br>
I didn't find the density of electrons and ions also, so , how can I get the right X-ray intensity at a certain location, for example, the right or down boundary, or any slice of the slab?</span><span style="font-size:10.5pt;font-family:"Lucida Grande",sans-serif"><o:p></o:p></span></p>
<p style="background:white"><span style="font-size:10.5pt;font-family:"Lucida Grande",sans-serif;color:black"> Looking forward for your guidance, thank you.<br>
For the pictures please see the attachment.</span><span style="font-size:10.5pt;font-family:"Lucida Grande",sans-serif"><o:p></o:p></span></p>
<p style="background:white"><span style="font-size:10.5pt;font-family:"Lucida Grande",sans-serif"><o:p> </o:p></span></p>
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