Dear @horvathd , Continuing the discussion from Questions about source_newgen.f : I found some doubts regarding your spectra. For example, in that spectra shared in the above discussion, at the initial point, for x = 1E-11 GeV (0.01 eV), the y value is nearly 1E+10 neutrons per cm2 per GeV; where…

Dear Riya, The difference in the previous topic is coming from the normalization of result. As you know, the FLUKA results are normalized to the primary particle (weight), while the real measurement takes into account the real intensity of the beam. Furthermore, during the the reading of the spe…

Thank you @horvathd for the useful discussion. Regarding this comment, should I increase the target volume or decrease it while using USRBDX?? [image] Dávid Horváth: To increase the difference you also included the volume of the region, thus numerically decreasing the result from the USRTRACK …

Dear Riya, You always should use the appropriate normalization for your scorings, I just mentioned this to explain the difference in the numerical values of your results. Cheers, David

Dear @horvathd , Sorry to open this thread again. Can you please explain the codes you wrote for spectrum sampling in your spare time ? What does this LUNOUT refer to ? if ( first_run ) then write ( LUNOUT, * ) '# ------------------------------------------------' write ( LUNOU…

Dear Riya, What does this LUNOUT refer to ? LUNOUT is the variable storing the logical unit number associated with the _.log_file. What is the scale factor here ? What does this energy_unit refer to? the scale_factor variable stores the conversion factor between energy units. The energy_unit is …

Thank you @horvathd for the detailed explanation. Regarding the following comment, my concern is if the spectrum.txt file is having MeV unit(instead of eV unit present in this case), where to give commands to convert it in GeV since FLUKA uses GeV units? When it is reading the string in energy_un…

Dear Riya, When you call the sample_spectrum() you specify the unit "eV", then the script will translate it into the appropriate scaling factor. No change necessary, because where the script calculates the area below the spectrum between two energies (omitting the division by two, because the …

Thank you @horvathd for the detailed explanation. Regards, Riya

FLUKA User Forum

Spectrum sampling in source_newgen.f

Advanced Features and User Routines

show post in topic

Home
Categories
Guidelines
Terms of Service
Privacy Policy

Powered by Discourse, best viewed with JavaScript enabled