Dear Gianluca,
To answer your questions:
1) In principle, you can bias the inelastic nuclear scattering length using the LAM-BIAS card. However, in your case the situation is a bit more subtle. For 40A GeV Pb beam on a Pb target the EMD cross section is a few times larger than the nuclear cross section (btw, EMD is not switched on by default - you have to use PHYSICS card for this). So if you would heavily bias the inelastic nuclear scattering then you risk to get a statistical imbalance between the two processes. Unfortunately, I don't think there is a way to bias the EMD mean free path. However, if you switch on EMD, you will see that you will already get more interactions than with your present input file (where EMD is off).
2) No, unfortunately this is not possible.
Please note that you might want to activate also other physics options if relevant for you (e.g. evaporation is not on by default and also needs to be activated with the PHYSICS card - see the manual for details). In addition, you need to link DPMJET for the nuclear interactions.
Cheers, Anton
________________________________
From: owner-fluka-discuss_at_mi.infn.it [owner-fluka-discuss_at_mi.infn.it] on behalf of Gianluca Usai [gianluca.usai_at_ca.infn.it]
Sent: 20 February 2019 14:22
To: fluka-discuss_at_fluka.org
Subject: [fluka-discuss]: fluka simulation with a Pb beam to estimate particle fluence in silicon tracking stations
Dear Fluka experts,
I am running simulations with a 40 AGeV Pb beam hitting a Pb target to study the particle fluence on silicon detectors placed downstream of the targets.
I attach the input file.
I have the following questions:
1. the Pb target thickness corresponds to \sim15% interaction probability. Most of the ions are passing through the targets and the central hole of silicon detectors. Is there a way to force all simulated ions to interact in the target in order to estimate the fluence corresponding to the interacting ions?
2. Is it possible to select interactions in a given centrality class? For instance 0-5% most central collisions?
Thanks in advance,
best regards,
Gianluca Usai
______________________________
Gianluca Usai
Professor of physics
Department of Physics and INFN
Cagliari - Italy
Phone:
+39 070 675 4906
+41 22 767 5740 (CERN)
Address:
Strada prov.le per Sestu, km 1.00
09042 Monserrato (CA)
Italy
web:
http://gruppo3.ca.infn.it/usai
http://people.unica.it/gianlucausai
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Received on Wed Feb 20 2019 - 18:06:52 CET