Dear experts,
when using LOW-PWXS cards to solve the problem regarding the “Low energy neutron xsec not found for some media” problem encountered byhttps://fluka-forum.web.cern.ch/t/low-energy-neutron-xsec-not-found-for-some-media/1259?u=sean_wintersand https://fluka-forum.web.cern.ch/t/errors-with-element-te/3738?u=sean_winters and https://fluka-forum.web.cern.ch/t/low-energy-neutron-xsec-not-found-for-tellurium/5129?u=sean_winters . I have read almost all relevant thread on the forum , and still cannont figure how to solve the Te problem .
Please help me how to correctly set the LOW-PWXS card .
My Fluka version is 4.3-4 and flair version is 3.3-0 and here is my input files and output files
Many thanks!
cheers!
CSHY.flair (4.4 KB)
CSHY.inp (5.1 KB)
CSHY001.out (25.2 KB)
source.f (10.2 KB)
Dear Sean,
according to the output file, you are still using FLUKA 4-1.1. Please check your simulation with the latest version, and make sure you have neutron cross section database installed.
To simply enable the point-wise neutron cross section in FLUKA for all materials, you only need to use an empty LOW-PWXS cards, without any options.
Cheers,
David
Dear David,
Thank you for your attention and time! the problem seems to be within the source.f file , after changing the coordinate of the first four source(which originally locate on the surface of the RCC body “chacha”) , and add an empty LOW-PWXS card ,the simulation runs ok now.
And the version of fluka in outputfiles now turns to be fluka 4.3-3 which is confusing ,for i only change the coordinate and the LOW-PWXS card.
By the way , the touching body warning problems, though not gonna terminate the simulation, still worries me for it may slow down the computation , need some instruction on how to avoid the touching body warning. Currently i m considering using PLA to cut the body , which might involve to many parenthesis in the geometry setting.
Thanks again for your time!
And here is the OK version of my inputfiles and output files.
Cheers!
CSHY.flair (4.9 KB)
CSHY.inp (5.0 KB)
CSHY001.out (160.2 KB)
source.f (10.2 KB)
Dear Sean,
if you use a source routine, you must recompile the executable every time you update FLUKA. Otherwise, you will still be using the old version, which the executable was compiled originally with.
The touching bodies should not slow down the simulation, but in some cases could lead to geometry errors. It is a good practice to avoid them and to use planes, as you planned.
You can avoid the use of parentheses, by splitting the regions into multiple zones.
Cheers,
David
Dear David,
Thanks again for your reply, really helps a lot.
Cheers,
Sean