**From:** Paola Sala (*paola.sala@cern.ch*)

**Date:** Wed Sep 12 2007 - 14:02:02 CEST

**Previous message:**Paola Sala: "Re: energy conservation"**Messages sorted by:**[ date ] [ thread ] [ subject ] [ author ] [ attachment ]

-------- Forwarded Message --------

From: Paola Sala <paola.sala@cern.ch>

Reply-To: paola.sala@cern.ch

To: Ercan Pilicer <ercanpilicer@gmail.com>

Subject: Re: shielding_distributions

Date: Wed, 12 Sep 2007 13:53:34 +0200

Hi

FLUKA always normalizes result per primary particle. If you need

to calculate the total energy deposition by a particle beam, you will

have to multiply the results by the number of particles delivered by the

beam.

This has nothing to do with the number of particles in your fluka run,

of course.

All energies are in GeV, deposited energy by USRBIN is in

GeV/cm3/primary

Al dimensions are in cm, Fluences are in particles/cm2/primary

If you need dose, first of all you have to divide by the density of the

material to get results in GeV/g/primary, than apply conversion factors

to obtain Gray/primary, than multiply by your beam integrated intensity

to obtain total dose. This can be done offline ( multiply all the

results by the appropriate factor) or online using the COMSCW routine

If you need dose rate you'll have to multiply your results by the beam

intensity in particles/hour . Again, this is the intensity of the REAL

beam, it has nothing to do with the CPU time used by FLUKA to transport

particles ( which , by the way, depends on the computer one is using..)

Paola

On Wed, 2007-09-12 at 12:55 +0300, Ercan Pilicer wrote:

*> hello,
*

*>
*

*> for the deposited energy;
*

*> USRBIN 10.0 ENERGY 70.0 300.0 150.0 550.0Energy
*

*> USRBIN -300.0 -150.0 -250.0 120.0 30.0 80.0&
*

*> but in what unit?
*

*>
*

*> for neutron flux;
*

*> USRBIN 10.0 8.0 80.0 300.0 150.0 550.0Neutron
*

*> USRBIN -300.0 -150.0 -250.0 120.0 30.0 80.0&
*

*> the unit of what i get from fort.80 since it gives per primary?
*

*>
*

*> for gamma dose;
*

*> dr.Klaus Ott gave me some instruction about converting to units of
*

*> Sv/h. briefly;
*

*> - check *.out standart output file to see avarage cpu time used and
*

*> then convert to number of primaries;
*

*> *START 1.E4 99999999. 60.0 99999999.
*

*> * Average CPU time used to follow a primary particle: 2.720E-04 seconds of
*

*> * 1 hour run = 1 x 3600 / 2.720E-04 = 13235294 = 1.32e7
*

*> START 1.32E7 99999999. 60.0 99999999.
*

*> - and plot a plane by paw
*

*>
*

*> it sounded complicated to me so i am looking for another way. any comment?
*

*>
*

*> and while searching for, found a work about this.
*

*> www-zeuthen.desy.de/students/2006/doc/marquardt.pdf
*

*>
*

*>
*

*> cheers
*

*> e.
*

*>
*

*>
*

*>
*

*> On 9/11/07, Ercan Pilicer <ercanpilicer@gmail.com> wrote:
*

*> > dear users,
*

*> >
*

*> > i would like to simulate distributions of;
*

*> > - gamma dose (Gy/h)
*

*> > - neutron flux (n/cm2)
*

*> > - deposited energy (MeV)
*

*> > in TAC experimental hall.
*

*> >
*

*> > could you please give some comments (how-to-do) for any of this?
*

*> >
*

*> > cheers,
*

*> > e.
*

*> >
*

*> > ps. i attached the input file
*

*> >
*

*> >
*

*> >
*

*> > +++++++++++++++++++++++++++++++++
*

*> > Ercan Pilicer
*

*> > High Energy Physics Department
*

*> > Uludag University, Turkey
*

*> > +++++++++++++++++++++++++++++++++
*

*> >
*

*> >
*

*>
*

*>
*

**Previous message:**Paola Sala: "Re: energy conservation"**Messages sorted by:**[ date ] [ thread ] [ subject ] [ author ] [ attachment ]

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