Re: How can i cut off transmitted beam particle

From: Anna Ferrari <>
Date: Mon, 27 Jul 2009 18:50:31 +0200 (CEST)

 Hello Mr. Patil,

  you want to cut the primary electrons, that are transmitted through a
  target. Maybe it is useful to remind that you cannot, obviously,
  cut the transport of the primaries:
  you simply want, I assume, to build distributions of physical quantities
  taking into accout only the contribution of secondary particles, that are
  produced in your target.
  If you want to do this by using cards as USRBDX, USRYIELD, and so on,
  you can build a filter by using the routine fluscw.f.
  In this routine you have to include the common (TRACKR),
  that contains the variable:

        Ltrack = flag recording the generation number

  Since Ltrack = 1 means primary particle, you can do the selection by
  writing the following line:

   IF (Ltrack.eq.1) THEN Lsczer = .TRUE.

  If the logical flag Lsczer is true, no amount will be scored.
  In this way you have a filter routine, that you will link together with
  the others when you build your FLUKA executable.

  I hope it will be useful,

  Anna F.

> Dear Fluka experts
> Is it possible to cut off only primary electrons which are
> transmitted through the target, When 15 MeV electron beam is
> incident on thin target. I have used EMFCUT card as
> EMFCUT -0.0155 1e-5 0.0 43.0
> region 43 is after the target.
> This card cut the primary as well as secondary electron also positrons.
> How can I cut the primary beam particle only (i.e. electron of ~ 15MeV).
> Thank you in advance.
> B. J. Patil
> Mr. Bhushankumar Jagnnath Patil.
> Microtron Accelerator Lab.
> Department of Physics,
> University of Pune,
> Ganeshkhind, Pune 411007
> Ph. No. Off. 020-25692678 Ext. 421
> Mob. 9823968377
> Webpage
> Alternate e-mail
Received on Tue Jul 28 2009 - 11:08:42 CEST

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