RE: [fluka-discuss]: SCORE Output "By One Beam Particle" on behalf of Marlon Saveri Silva

From: Alberto Fasso <Alberto.Fasso_at_cern.ch>
Date: Mon, 14 Dec 2015 10:22:41 +0000

Marlon Saveri Silva said:
> I noted SCORE card gives its Energy Density output in "GeV/cm**3/one beam
> particle.

> Is there any significant difference between "one beam particle" and
> "particle weight"? Does both mean the deposited energy in a region by
> primary weight?

In FLUKA, each particle, primary or not, is counted by its weight, so the output of SCORE should be more
correctly indicated as "GeV/cm**3/unit beam particle weight".
There is only an exception for the generalized particles UNB-ENER (particle 229) and UNB-EMEN (particle 230):
 UNB-ENER 229 Unbiased deposited energy (GeV)
 UNB-EMEN 230 Unbiased electromagnetic energy (of electrons, positrons or photons) (GeV)
From the manual: "Unbiased energy" means that the energy deposited
     is scored with weight 1, independent of the actual weight of the particle.
     Of course, the result will have no physical meaning, but in some
     circumstances it will provide useful information about the run itself (for
     instance in order to optimise biasing).

Vittorio said:
> from what I remenber SCORE trigger the scoring per primary independently from its weight.

NOOOOOOO!!!!!!
FLUKA always scores per UNIT WEIGHT, except for the cases indicated above.

Alberto

________________________________________
From: owner-fluka-discuss_at_mi.infn.it [owner-fluka-discuss_at_mi.infn.it] on behalf of Vittorio Boccone [dr.vittorio.boccone_at_ieee.org]
Sent: 13 December 2015 23:24
Cc: fluka-discuss_at_fluka.org
Subject: Re: [fluka-discuss]: SCORE Output "By One Beam Particle" on behalf of Marlon Saveri Silva

Dear Marlon,
from what I remenber SCORE trigger the scoring per primary independently from its weight.
I would suggest you to modify your source routing in order to statistically sample over you distribution (if you can) and keep the weight of the primary to one.
Eventually you could move from the SCORE card to the more flexible USRBIN (although in case of region scoring you might have to do the normalization to the volume manually)

Best,
Vittorio

On Thu, Dec 10, 2015 at 9:17 AM, Paola Sala <paola.sala_at_mi.infn.it<mailto:paola.sala_at_mi.infn.it>> wrote:
SCORE Output "By One Beam Particle"

Dear users,

I noted SCORE card gives its Energy Density output in "GeV/cm**3/one beam
particle.

Is there any significant difference between "one beam particle" and
"particle weight"? Does both mean the deposited energy in a region by
primary weight?

If I use a monochromatic beam as input, I believe there's no difference,
however, I modified source.f in order to use a spectrum of Photons from a
table, such that the sum of all weights is 1. So, when I get an USRBDX
output data in Photons/cmq/GeV/primary weight, I understand I just need
multiply it by the area of the detector, the gap of energies and by a
number (relative to the total quantity of photons in a second) to get
Photons/s/eV (the unity I need).

But, when I read "/ one beam particle", I'm not sure if I adopt the same
procedure.


Att.

Marlon


Paola Sala
INFN Milano
tel. Milano +39-0250317374<tel:%2B39-0250317374>
tel. CERN +41-227679148<tel:%2B41-227679148>

Paola Sala
INFN Milano
tel. Milano +39-0250317374<tel:%2B39-0250317374>
tel. CERN +41-227679148<tel:%2B41-227679148>

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Received on Mon Dec 14 2015 - 11:22:41 CET

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