[fluka-discuss]: question about DTRACK

From: Shirley Li <shirleyli.phys_at_gmail.com>
Date: Thu, 12 Jul 2018 17:31:37 -0700

Dear FLUKA users,

I am studying particle propagation in liquid argon. When I look at proton
energy loss, DTRACK in mgdraw, I thought it should be ~= CTRACK * dE/dx
rate. While this seems true (with fluctuations) for almost all proton
tracks, occasionally I get very large DTRACK, compared to CTRACK * dE/dx.
 For example, for the input attached below, I get the following examples:
   ncase jtrack etrack ptrack z0 z1 ctrack
     dtrack
    25.0 1.0 1.009945 0.373675 0.0 0.768607 0.785268 0.229055
    37.0 1.0 0.961867 0.211738 0.0 0.037436 0.127902 0.118133
    43.0 1.0 0.968080 0.238378 0.0 0.052170 0.193938 0.137920

     KE dEdx ctrack*dE/dx
  0.071672 0.009352 0.007344
  0.023595 0.022066 0.002822
  0.029808 0.018381 0.003565

Here the dEdx rate is interpolated from FLUKA output .out file for
protons. These protons are not near boundary or anything. And the dtrack
is not only longer than ctrack*dE/dx, but they are also larger than the
proton kinetic energy. So I'm not sure if I misunderstand what DTRACK
means. Does anyone understand this?

My inputs attached below. The source file is user-defined because I'm
injecting secondary particles coming out of another generator. I cannot
reproduce this behavior when I just inject primary protons in FLUKA.

Thank you very much!!

Shirley



__________________________________________________________________________
You can manage unsubscription from this mailing list at https://www.fluka.org/fluka.php?id=acc_info

Received on Fri Jul 13 2018 - 03:36:12 CEST