Date: Fri, 3 Nov 2023 17:19:34 +0100
Dear FLUKA Experts,
I am writing to you for an issue I've encountered while running a FLUKA simulation.
I have created an input file for a simulation involving a rectangular electron beam (8x8 cm) that is directed towards a water box. Before interacting with the water box, the beam is expected to pass through a collimator. This collimator has been defined as an RPP with numerous small rectangular holes, and it is was at first positioned at the origin (0,0,0).
To orient the collimator perpendicular to the beam, I have applied two rotations and a translation.
Upon inspecting the geometry of the simulation, the input file appears to be correctly defined, with the collimator positioned approximately 40 cm (arbitrary) from the point where the pencil beam is aimed, which is [-1.876, -0.766, -3.3].
However, when I run the simulation and visually inspect the particle tracks, it seems that the beam is not interacting with the collimator….


Could you please review the input file and my geometry definitions to help me identify any potential issues?
Thank you for your time.
Sincerely,
Gaia Franciosini

-- **Fai crescere le giovani ricercatrici e i giovani ricercatori* **con il 5 per mille alla Sapienza *Scrivi il codice fiscale dell'Università *80209930587 Cinque per mille <https://www.uniroma1.it/it/node/23149>*
Could you please review the input file and my geometry definitions to help me identify any potential issues?
Thank you for your time.
Sincerely,
Gaia Franciosini
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- application/octet-stream attachment: Collimator.inp