RE: [Fwd: Re: Insufficient space for allocation in blank common]

From: Vasilis Vlachoudis <Vasilis.Vlachoudis_at_cern.ch>
Date: Wed, 6 Feb 2013 08:55:51 +0000

2013 09:55:58 +0100 (CET)
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Hi Monica,

it is possible to plot multiple USRBINs on the same plot, but not with the standard plot in flair but inside the Geometry Editor. You have to create a layer and add the Usrbin mapping. You can add up to 10 Usrbins

Vasilis Vlachoudis
Dep EN, CERN
CH-1211 GENEVA 23
SWITZERLAND

Phone: +41-22 767 9851
GSM: +41-76 487 4378
Fax: +41-22 766 9644


________________________________________
From: Paola Sala [paola.sala_at_mi.infn.it]
Sent: 06 February 2013 09:48
To: Vasilis Vlachoudis
Subject: [Fwd: Re: Insufficient space for allocation in blank common]

Hi Vasilis
could you have a look to the last question in this e-mail? I do not think
it's possible now in flair, but how difficult would it be?
Paola

---------------------------- Original Message ----------------------------
Subject: Re: Insufficient space for allocation in blank common
From: "Monica Huerta Parajon" <mhuerta_at_essbilbao.org>
Date: Tue, February 5, 2013 11:59 am
To: "Paola Sala" <paola.sala_at_mi.infn.it>
Cc: fluka-discuss_at_fluka.org
--------------------------------------------------------------------------

Dear Paola, users,


  Thank your for your prompt response.

  If I understood correctly, you are suggesting to plot two different
figures:

    1.

    A general picture with coarse mesh

USRBIN 10. PROTON -64. 301.0 301.0 701.0Protons

USRBIN -301.0 -301.0 -301.0 200.0 200.0 200.0&



    1.

    A more specific picture (just the beam line) with fine mesh


  USRBIN 10. PROTON -64. 20.0 20.0 45.0Protonz1

USRBIN -20.0 -20.0 -3.0 300.0 300.0 300.0&


  However, according to our simulations, the general picture do not show
accurate results compared to the specific one even with a finer mesh in the
general picture (300x300x300).

  The idea was to plot the whole room with beam line and walls in order to
check the protons and neutrons along the beam line and stopped in the walls
(in order to define the wall thickness). Hence, the importance of having
good accuracy in the general picture.

  Since the proton flux offered by the general mesh do not agree with the
proton flux offered by the specific mesh, should the bins of the specific
mesh be defined in any proportional way to the general mesh to preserve the
physical meaning of the result?

  Is it possible to plot in a same figure an area with more bins than other?
Using, for example, the preprocessor?

  Thank you for helping us


  Best regards


  Monica

--
Monica Huerta Parajon
Proton Beam Applications group
Edificio Cosimet
Paseo de Landabarri, 2, 1a Planta
48940 Leioa - Spain
http://www.essbilbao.org
Tfno.: +34 946 07 66 41
mhuerta_at_essbilbao.org
On 3 February 2013 14:31, Paola Sala <paola.sala_at_mi.infn.it> wrote:
> Dear Monica,
> the available memory space for scoring is 360MB. With a 300x300x300 mesh
> the occupancy is 216MB, still below but near.
> The overall memory allocation is hard-wired in the library, you have no
> possibility to change it. However, my suggestion would be to stick to the
> approach you had at the beginning, a fine mesh where the distibutions aare
> narrow, a coarse mesh covering tethe rest. Otherwise, the problem would be
> not only memory, but also statistics, the "external" thin bins will never
> be filled!
>
> Regards
> Paola
>
> > Dear fluka users,
> >
> > We are trying to simulate a target room for radiobiological studies with
> a
> > beam line and with concrete walls and an outside room. We have tried to
> > compare two different calculations of the same problem but we are
> > obtaining
> > different results:
> >
> >     1.
> >
> >     The proton flux in the whole assembly (10x6x6 meters, 250 bins in
> > x,y,z)
> >     2.
> >
> >     The proton flux just in the vicinity of the beam window (45x40x40 cm,
> >     250 bins in x,y,z)
> >
> > While 1 offers maximum values of 10E7 protons/cm2·s, 2 offers maximum
> > values of 10E9 protons/cm·s. We have assumed that this contradiction is
> > due
> > to poor accuracy in 1 (not enough bins). However, when trying to run more
> > than 300 bins in x, y and z the following error appears:
> >
> >   ******* Stopped in usrbin: insufficient space for allocation in blank
> > common *******
> >
> >   We tracked down the problem and found that this message is generated
> > inside libflukahp.a (more precisely, usrbin.o). The question is then if  a
> > modification of the library is required or if it can be fixed changing
> > some
> > src code in the flutil package
> >
> >   We would be really grateful if someone could advise us about that.
> >
> > Thank you for your time
> >
> > Monica
> >
> >
> >
> >
> > --
> >
> > Mónica Huerta Parajón
> >
> > Proton Beam Applications group
> >
> > Edificio Cosimet
> > Paseo de Landabarri, 2, 1ª Planta
> > 48940 Leioa - Spain
> > http://www.essbilbao.org
> >
> > Tfno.: +34 946 07 66 41
> > mhuerta_at_essbilbao.org
> >
>
>
> Paola Sala
> INFN Milano
> tel. Milano +39-0250317374
> tel. CERN   +41-227679148
>
>
>
Paola Sala
INFN Milano
tel. Milano +39-0250317374
tel. CERN   +41-227679148

Received on Wed Feb 06 2013 - 18:01:23 CET