Scoring H3 and He4 in optical fiber

[adonadon (Andre Donadon Servelle)]

Dear Xiong,

Thanks for clarifying the problem.

For the first point:

One way to compare the number of He-4 + H4-3 with different thickness could be using the card USRTRACK.
With this card you will be able to obtain the energy spectrum of a desired particles. I suggest you to read this thread:

Accessing particles data in FLUKA

Dear experts, I am new to Fluka and Flair, before i only worked with c++ packages like Geant4, Pythia8. I want to compare Geant4 and Fluka for one experiment. In Geant4 i can access all secondaries data on each step. This way i can get spectrums of particles when they leave target(i simply call function to give me particle energy on the last step before it deletes). Using flair i understood how to use USRBIN. But how can i simulate perfect detector that returns value of energy, or transverse mo…

Another option, If I understand properly and what you want is to count the number of He-4 and He-3 generated in a particular region you can use MDSTCK. It is a subroutine part of MGDRAW, that is is called every time a secondary particles is generates. With that you can calculate the number of particles generated. To use MGDRAW you can look this thread where it is explained:

Use of MGDRAW with my input file

Dear fluka Expert I am still a beginner and I want to use MGDRAW with my input file on flair. I have modified the MGDRAW file to suit my input file and expectation result but I don’t know how to connect both MGDRAW and input file together and run. Is there any specific area in the manual that explains this? I am new on how to user routine.

For the second point:
I would suggest you to use the scoring card USRBDX.
You can look the manual here (USRBDX)
So, as not be repetitive I propose you to read these other threads where you can find very well
explained how to use this card:

Accessing particles data in FLUKA - #4 by yurchenko.sv (Again, but ony last answer)
Best way to score the number of beam particles in a region - #4 by duarte.guerreiro

If I understood correctly, in your case you will need to define one USRBDX card, from region ‘COAT’, to 'JACK2, for the particle ‘OPTIPHOT’ (I suppose that It was your strategy when you defined your second USRBIN card)

Just a last comment, sometimes the plots obtained from the PLOT tab in a projection may be not so intuitive, that’s why I propose you to do the next in order to see your scoring in the GEOMETRY tab on Flair:

1. Go Geometry
2. Window on your left, subtab ‘Layers’
3. Select one of the layers that you are using ( e.g. Media)
4. Press and Usrbin
5. The usrbin window will appear and there you have to choose the .bnn file of interest ( choose also the detector)

Then, you will be able to plot your results.

Let me know if you need more help,

Best,
André