Re: [fluka-discuss]: following particle in every step (NTRACK vs NTRUCK)

From: Vittorio Boccone <>
Date: Wed, 18 Jun 2014 23:11:08 +0200

Hi George,
 mgdraw is a very powerful tool, but I see you already know what are the
different ingredients.
If you miss the successive steps I guess you activate it using the wrong
WHAT(3) in the USERDUMP card, or your threshold are too high and the
particles are "absorbed" in loco.

I would suggest you to play around with the default mgdraw.f and maybe to
post your code. It's a bit complicate to tell you what is wrong if I can't
see what you do.

I would leave NTRUCK aside for the time being.

On Wed, Jun 18, 2014 at 3:12 PM, <> wrote:

> Dear FLUKAers,
> I'm trying to develop a short user routine (in mgdraw) for custom scoring
> and I got the following questions:
> - Shooting 100MeV protons in a water target and printing the JTRACK,
> expected to see when following my particle step by step along its
> trajectory. Nevertheless, the NTRACK (and the MTRACK as well), seems to be
> always 0. If the meaning of of the track segment is what I thought,
> shouldn't it be incrementing along the trajectory?
> - Then I see that there is also the variable NTRUCK, which represents the
> number of step points. When I print this in mgdraw, it's also always 0 for
> my primary protons. So same question as above. In addition, I am not sure
> that I understand the difference between the track segment (~NTRACK) and
> the step (~NTRACK)
> - What I ultimately had in mind was to follow the particle in every step
> and -for example- store the newly generated secondary particle position
> (the starting point of the first track segment or step)
> Obviously I am missing something important here, so I would be grateful if
> you can help me on this or point me to some reference that clarifies it.
> Thanks in advance,
> George
Received on Thu Jun 19 2014 - 01:49:47 CEST

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