Hi Valentine,
let me begin by trying to clarify possible misconceptions.
1. The number of primaries to be run by FLUKA corresponds to the number of different histories FLUKA will sample in order to end up with an "average" effect (e.g. energy deposition) per primary. In other words, the more primaries (and 5 or more different cycles for the error evaluation) the better your statistical convergence of both the value and the error will be.
2. IRRPROFI is needed only if you are interested in activation studies. If this is the case I would advise you to take a look at the respective FLUKA course lecture:
http://www.fluka.org/content/course/NEA/lectures/Activation.pdf
3. In case you are not interested in activation then you do not need IRRPROFI card and you will just get the values you are interested (e.g. Energy deposition GeV/cm^3/primary) "averaged" per primary proton. If you know your intensity of your beam you can simply multiply your results with it (and i.e. get power deposition).
4. To address your question, IRRPROFI has nothing to do with the number of primary histories. Your specific example is a bit tricky since the numbers are quite low, but by scaling it up, you can have: a 60s irradiation with intensity of 1e8 p/s and you can (probably) simulate that with 10 cycles of 1e5 primary protons. The latter depends on the statistical convergence of your specific problem
Kind regards
Lefteris
-----------------------
Eleftherios Skordis
Dep. EN/STI, CERN
CH-1211 GENEVA 23
SWITZERLAND
OFFICE: +41-22-7679541<tel:%2B41-22-7675461>
________________________________
From: owner-fluka-discuss_at_mi.infn.it [owner-fluka-discuss_at_mi.infn.it] on behalf of Valentin Bonvin [valentin.bonvin_at_cern.ch]
Sent: 04 May 2017 09:19
To: fluka-discuss_at_fluka.org
Subject: [fluka-discuss]: How to use IRRPROFI
Hello, firstly sorry for my English I'm not so good.
I'm a beginner in FLUKA, and I have one question, if I want to simulate an irradiation I saw that it's was necessary to use IRRPROFI card with the two following parameters, Time of irradiation (in s) and the intensity (in p/s). But I don't understand if the intensity and number of primary histories are correlated, for example if I choose 2s of irradiation with intensity of 1000 p/s, should I put 2000 primary histories or not ?
Thanks a lot,
Valentin BONVIN
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Received on Thu May 04 2017 - 12:15:29 CEST