RE: Scoring Low-Energy Electrons

Hey Joachim,
thank you very much, that helped (especially the DEFAULT card)!

Johannes

Quoting Joachim Vollaire <joachim.vollaire_at_cern.ch>:

> Hi Johannes
>
> A few things which may help you get started, first I did run your
> program both from FLAIR or from the command and in both cases it
> seems to work, however it takes a long time to complete one particle
> history due to the MULSOPT parameters you are using I suspect.
> Instead I have tried the following to obtain a more reasonable
> computing time (it is taken from the manual), I would try this and
> see what results you get :
>
> * Maximum accuracy requested for the electron step size used in the boundary
> * approach and in the optimisation algorithm. Single scattering
> activated for
> * electrons at boundary crossing and when the step is too short for Moliere
> * (but not when the energy is too low for Moliere). Boundaries will be
> * crossed with 2 single scatterings.
>
> *...+....1....+....2....+....3....+....4....+....5....+....6....+....7....+...
> MULSOPT 1.0 1.0 1.0 1.0 0.0
> 2. GLOBEMF
>
> You should also notice that FLUKA transports e-/+ and gamma down to
> 1 keV (not below). To set the transport value to that minimum be
> sure to used the EMFCUT card. Also I would suggest you use the
> DEFAULTS card which may allow you to have "customized" defaults for
> your problem....
>
> Let me know if it helps resolve your problem.
>
> Joachim
>
>
>
> ________________________________
>
> From: owner-fluka-discuss_at_mi.infn.it on behalf of
> J.Stiller_at_stud.uni-heidelberg.de
> Sent: Fri 7/24/2009 7:08 PM
> To: fluka-discuss_at_mi.infn.it
> Subject: Scoring Low-Energy Electrons
>
>
>
> Dear Fluka experts,
> I would like to be able to detect electrons at energies below 1keV in
> Argon, using the USRTRACk (linear binning, starting at E_min= 0.0) card.
> In the manual it is said that in order to obtain good results with low
> energy electrons one has to use the MULSOPT card, activating only
> single scattering. Now, I am using Flair and somehow it is not
> possible to set WHAT(3)=0.0 ("Stretching") of MULSOPT... If I do not
> take any of the values of the drag down Fluka crashes.
>
> What am I doing wrong?
>
> Thank you for your help and for the advice I generally received so far!
>
> Johannes
>
>
>
Received on Tue Jul 28 2009 - 20:28:47 CEST