[fluka-discuss]: About BIASING option to get particle distributions

From: babintsev <babintsev_at_ihep.ru>
Date: Fri, 13 Mar 2020 09:15:13 +0300

   Dear experts,

  I want to get E-, T- distributions (and large statistics - as the 1-st
  step) at the large distance from the target.
  I have checked the BIASING option for this task. - simple detector

  Lead target in the polyethilen , P beam with E= 2 GeV.
  On the right and on the left of the target there are 2 virtual
  counters (box of air) : C2 and C22.

  C2 is disposed at the interior of 3 air-boxes with BIAS-coefficients:

  C22 - on the left has no BIAS option : direct filling for particles
          to compare results with C2.

  I saved also input particles at C2 and C22
  (initial lines are presented)

  Results are in zip-file : result.zip.

  My questions :
  1)  for C2 with BIASING I have got large multiplication of secondary
      particles - BUT they have the same parameters !
      As a result, E-distributions for C2 and C22 (no BIAS) are the same.

      So, BIASING here can improve only integral values , for example :
          particle density in the given volume
          But, distributions are the same .. - am I right ?

  2) Are there any methods (ideas ?) how to change parameters of the
     particles for C2 : E-values, angles,... to enlarge statistics
     as the 1-st step for the following 2-nd step of simulation ?
     ... or I have to to use only direct C2 filling (no BIAS)

  Thank you,

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Received on Fri Mar 13 2020 - 09:27:10 CET

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