Hi Jean Emmanuel,
the best is the output from DELTARAY. You can always increase the tabulation by altering the WHAT(2) and/or WHAT(3)
If you want to calculate with simulation (which is no-brainer in this case) but just for the fun of it
- create a very thin geometry (e.g. thickness 10um) of WATER (use the default water material from FLUKA)
- turn off the EMF (with EMF-OFF)
- increase the dp/dx tabulation with the DELTARAY
- set your proton beam at 30MeV
- increase the inelastic/elastic interaction thresholds to something higher than your beam with THRESHOLD
- score with USRBIN by region the total energy deposited
divide your region-energy by your target thickness
I've got 18.76 MeV/cm with 1e7 protons
Vasilis
________________________________________
From: owner-fluka-discuss_at_mi.infn.it [owner-fluka-discuss_at_mi.infn.it] on behalf of Jean-Emmanuel Groetz [jegroetz_at_univ-fcomte.fr]
Sent: 29 January 2015 14:48
To: FLUKA discussion ý[fluka-discuss_at_fluka.org]ý
Subject: [fluka-discuss]: Stopping power of protons in water (next part)
Dear all,
Further to my message yesterday, I can clarify my needs.
For example, the PTRAC database from NIST gives 18,75 MeV/cm for 30 MeV
protons in water. How can I find this value after a fluka run with 1e6
protons?
A USRBIN card with only one bin in x and y gives me the dE/dx
distribution along the z axis, but not the corresponding value from
PSTAR or from the DELTARAY card.
Thanks for your help.
Jean-Emmanuel
--
_______________________________________________
Jean-Emmanuel Groetz
Laboratoire Chrono-Environnement UMR CNRS 6249
Chimie-Physique & Rayonnements
Université de Franche-Comté
16 route de Gray
25030 Besançon Cedex
France
mailto : jegroetz_at_univ-fcomte.fr
tel : +33 (0) 3 81 66 65 07
fax : +33 (0) 3 81 66 65 22
http://chrono-environnement.univ-fcomte.fr/
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Received on Thu Jan 29 2015 - 18:19:38 CET