Is helix trajectory of the delta electrons took into account in USRTRACK?

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FLUKA:
Flair:

Description

Dear FLUKA experts.

As I know, if I normalize USRTRACK picture on bin value, I will get such normalization: number of particles per beam particle per cm2.
In some regions in my simulations there are delta electrons, which have helix trajectories, and can cross one volume many times. Are such electrons counted many times in this volume in this case?
I would like to have energy spectrum of electrons in some region with normalization on “real” number of particles without many counting.

Best regards

Anna

Input files

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3

Not really: you will get particle tracklength density (that is fluence), namely traveled cm’s in a volume divided by the volume itself (cm^3), hence cm/cm^3 = 1/cm^2. Only in the ideal (uninteresting) case of particles traveling unperturbed along a linear dimension of the volume, this corresponds to the number of particles per unit transverse surface. Otherwise, it represents a very meaningful physical quantity that is proportional to the particle interaction rate (see a basic explanation). On the contrary, counting particles in a volume, irrespective of their path length, has no real sense. It’s rather on a surface that either particle counting (current) or tracklength density (fluence) can be separately evaluated.

Sure, based on the above, since what is counted is their path length.