Dear FLUKA experts,
Is there a way in FLUKA to show the stopping power of each area that the particles pass through during the calculation?
Thanks.
Hello Jin,
First of all, I want to clarify that stopping power is not a property of an area in the simulation, but rather of a charged particle as it traverses a material. Hence, I am not completely sure if I understand your question; I give you two options, one of which will hopefully fulfill your requirement.
Scoring linear energy transfer when particles enter a region
If what you are interested in is to know what stopping power the particles in your simulations are subject to when they enter/leave a region of interest, I suggest you look into linear energy transfer (LET) scoring in FLUKA. For this purpose, please refer to slide 16 of the latest FLUKA training and an associated exercise.
Printing stopping power tables for charged particles in your simulation materials
If, on the other hand, you want to see the stopping power used by FLUKA for all materials in the simulation, I suggest you use the DELTARAY and EMFFIX cards in the input (see these links for documentation EMFFIX and DELTARAY). Using the PRINT option on these cards, you will turn on the printing of the stopping power used in the code. For DELTARAY you can turn it on for all materials at once by selecting the appropriate boundaries in the “mat” and “to mat” options. This card will print in the output file (with extension .out) the stopping power for the materials you have selected for charged hadrons, muons, and ions. For EMFFIX you will need to use a different card for each material, specifying the material you want the stopping power for in Mat 1, and specifying the PRINT option. This card allows the printing of the stopping power and other information for electrons and positrons. If you use Flair to visualize the output, you will see that the above information is neatly organized in the dp/dx section of the output file.
I hope this is of help,
Stefano
Hello Stefano,
Thank you for your reply. I think the second way might work for me, I want to see the stopping power of the particles as they pass through the various zones of the FLUKA simulation, so that I can compare it with the stopping power of other devices, I will try this method!