Hi Ivan,
just to clarify the fluka normalization "/primary" vs "/s". For normal runs (excluding the decay runs)
fluka particles time (age) information is the time since the moment of creation of the primary,
where in the default source routine is zero 0. Assuming all simulated primary particles are generated
at zero-time and have no time-structure at all, that why you get per primary "/pr", typically fluence which is
the time-integral of the flux.
If you have a continuous process with a certain time structure, fluka will not take it into account,
you have to manually do it in your normalization at the end. So if your source is given as primaries/sec
you can multiply the fluka results by this value and convert them
from "/primary" to "/sec"
Vasilis
________________________________
From: owner-fluka-discuss_at_mi.infn.it [owner-fluka-discuss_at_mi.infn.it] on behalf of Iván Martínez Soler [ivan.martinezsoler_at_northwestern.edu]
Sent: Thursday, October 25, 2018 17:20
To: fluka-discuss_at_fluka.org
Cc: Yuber Ferney Perez Gonzalez
Subject: [fluka-discuss]: Atmospheric neutrino flux
Dear Fluka experts:
we are trying to simulate the atmospheric neutrino flux at the Earth´s surface. We are following the Cosmic Ray example in the notes. To score the neutrinos arriving to the Earth, if we use the card USRBDX we get a flux units of #particles/GeV/cmq/sr/pr, however, we need a flux unit of #particles/GeV/cmq/sr/s. We have also tried to use the card USRYIELD, but we are able only to get the double differential yield per energy and time. Can you help us to find the way to get the correct units for the flux? Thank you very much in advance.
Best regards,
Ivan and Yuber
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Received on Fri Oct 26 2018 - 11:21:59 CEST