<div dir="ltr">Just to provide some more context in case it's helpful:<div><br></div><div>I am using FLASH version 4.7.1, with the LaserSlab module. I have 7 mgd groups, as outlined in my .par file:</div><div>rt_useMGD = .true.<br>rt_mgdNumGroups = 7<br></div><div><br></div><div>It seems to me that FLASH must store information about radiation transfer in each group somewhere. I'm looking in FLASH4.7.1/source/physics/RadTrans/RadTransMain/MGD but it's not obvious to me where it's stored. It would be nice if I could just add it as a variable to flash.par to be included in the output files, but if I have to dig into the Fortran that's fine too. </div><div><br></div><div>If someone could point me in the right direction it would be much appreciated.</div><div><br></div><div>Thank you!</div><div>Owen</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Jul 9, 2025 at 3:30 PM Owen Bardeen <<a href="mailto:owenbardeen@gmail.com" target="_blank">owenbardeen@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">Hello all,<div><p>I’m currently working on a simulation involving radiative transport in a hot plasma using the FLASH code (v4.7.1). I’m interested in quantifying the radiative emission, with the capability of comparing radiative emission from different energy groups (0.1-1 eV, 1-10 eV, etc.). </p><p>My question is: what is the best way to determine the total radiative output, as well as from one specific energy bin/group, from FLASH output?</p>
<p>I’ve generated the necessary Propaceos opacity tables with a dedicated energy group covering just this narrow range. </p>
<p>If anyone has experience extracting radiative output from individual bands in FLASH, I’d greatly appreciate your guidance.</p><p>Thank you!</p><p>Owen Bardeen</p><p>University of California, San Diego</p></div></div>
</blockquote></div>