From: Stefan Roesler (email@example.com)
Date: Wed Oct 31 2007 - 20:24:46 CET
Without seeing the input I cannot give advice nor try myself different
settings (both for physics and scoring)
Could you please post all replies to the fluka-discuss list. Otherwise, it
is difficult and inefficient to keep track of replies. In addition,
answers might also be of interest to other users.
On Wed, 31 Oct 2007, Joel DeWitt wrote:
> Since LET is proportional to the square of the particle charge, I would like
> to score pretty much everything with some measure of charge
> (fragments+primaries). Attached is an experimental sample to illustrate what
> I mean.
> At the time being I'm only seeing the primary peak for 1 GeV/n 56Fe, but no
> low- or high-charge fragments. The sample does not represent my FLUKA system;
> it's just an example.
> I have been through the manual and played with some of the physics and
> transport cards to see if something wasn't "on". But I think the simplest
> solution (i.e. how I'm scoring) is probably at fault.
> Any input you can provide will be vastly appreciated.
> Many thanks,
> Joel DeWitt
> Eril Research, Inc.
> ----- Original Message ----- From: "Stefan Roesler" <firstname.lastname@example.org>
> To: "Joel DeWitt" <email@example.com>
> Cc: <firstname.lastname@example.org>
> Sent: Tuesday, October 30, 2007 6:35 PM
> Subject: Re: Particle LET, Part II
> > Dear Joel,
> > Could you please explain what exactly you would like to score? I am not
> > sure that I understand what you mean by "charged fragmentation" (LET
> > spectra for different charges?)
> > If you post the input file I could have a look and test options.
> > Greetings
> > Stefan
> > On Mon, 29 Oct 2007, Joel DeWitt wrote:
> > > BlankThank you, Paola, for your timely and on-target reply.
> > >
> > > I've successfully scored LET and formed (sort of) a spectrum from this,
> > > but without any fragmentation. Using the card:
> > >
> > > * score the LET spectrum (in water) of charged particles
> > > USRYIELD 2323.0 ALL-CHAR -41.0 PE CR39 1.0Yield
> > > USRYIELD 200.0 0.0 200.0 200.0 0.0 2803.0&
> > >
> > > I recover the expected primary ionization peak at the correct location
> > > for a 1 GeV/n 56Fe beam. I've tried setting the second variable in the
> > > double differential to "particle charge" and played with the upper and
> > > lower limits without success. I must confess that I don't completely
> > > understand this method of obtaining an LET spectrum since our method is
> > > literally a histogram of binned LET. Curiously, when I do attempt
> > > "particle charge" as the second variable, I get empty bins. The reason
> > > for this is not immediately obvious to me. What would be the proper way
> > > to score charged fragmentation?
> > >
> > > Best regards,
> > > Joel DeWitt
> > > Eril Research, Inc.
> > >
> > >
> > >
> > --
> > ___________________________________
> > Stefan Roesler
> > CERN, SC/RP
> > CH-1211 Geneva 23
> > Switzerland
> > Phone: +41-22-7679891
> > Fax: +41-22-7669639
> > E-mail: Stefan.Roesler@cern.ch
-- ___________________________________ Stefan Roesler CERN, SC/RP CH-1211 Geneva 23 Switzerland Phone: +41-22-7679891 Fax: +41-22-7669639 E-mail: Stefan.Roesler@cern.ch
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