Dear Nima,
only for the first module you have to define bodies and regions, while the remaining modules are a replica of the first one,
i.e. they are define as “empty” region in their respective position, linked to the first module by a appropriate transformation (one or more ROT-DEFI).
In the advanced course there are slides about the LATTICE concept
https://indico.cern.ch/event/489973/contributions/2000434/attachments/1270257/1881963/05_AdvancedGeometry2016.pdf
and an example of a geometry built with LATTICE
https://indico.cern.ch/event/489973/contributions/2000442/
Concerning the scoring, I’m not sure that DETECT is the best way as you will not be able to distinguish the contribution from different LATTICE.
I would go for EVENTBIN/USRBIN and filter the different module with the comscw user routine.
Hope this could help.
Best, luigi
On 15 Apr 2018, at 10:45, Nima Ghal-Eh <Nima.Ghal-Eh_at_fuw.edu.pl<mailto:Nima.Ghal-Eh_at_fuw.edu.pl>> wrote:
Dear FLUKA experts,
I am trying to model a GE Advance GEMS PET system which contains 56 modules each with 216 crystals (12096 crystals total).
The primary/basic module (i.e., a volume with 216 different scintillator crystals) is defined with conventional surfaces/bodies. Whilst, the other 55 modules, located at different angles around the ring, are defined by a set of LATTICE and ROT-DEFI cards. The responses of the primary crystals when exposed to gamma rays can be simply obtained by DETECT cards.
But, as we know, in order to locate the annihilation source, one has to use, at least, two module sets at opposite positions for studying possible coincidences. Could you please let me know what the simplest way to define the replica of primary module is? Do I have to again define a set of new bodies (i.e., crystals) at opposite position or is it better to use a user-routine?
Thank you very much in advance and looking forward to hearing from you soon.
Best regards,
Nima Ghal-Eh.
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Received on Mon Apr 16 2018 - 12:09:35 CEST