Dear Paola,
Thank you very much for your e-mail and clarification.
I understand now that not all electrons set in motion are controlled by the DELTARAY card, but in FLUKA delta-rays are electrons, right? Also, when you said, "They are produced by photons", you were referring to the electrons I'm detecting in the USRBIN and USRTRACK cards when DELTARAY set to -1 (no deltaray production), right?
The THERESHOLD card with high values switches off elastic and nonelastic nuclear interactions, electrons disappear as well as all other secondary particles. High thresholds in DELTARAY and EMFCUT cards do the job.
Many thanks,
Ana
________________________________
From: Paola Sala <paola.sala_at_mi.infn.it>
Sent: 09 March 2021 09:29
To: Ferreira De Almeida Lourenco, Ana <am.lourenco_at_ucl.ac.uk>
Cc: fluka-discuss_at_fluka.org <fluka-discuss_at_fluka.org>
Subject: Re: [fluka-discuss]: Fw: DELTARAY card
Dear Ana,
the electrons are not delta-rays. They are produced by photons, which are
produced in inelastic interactions.
One can check adding a THRESHOLD card with high values in what(3) and(4),
so that inelastic interactions are not performed: electrons disappear
Paola
> Dear FLUKA experts,
>
> I'm simulating a proton beam in water with no deltaray production.
> DELTARAY -1. WATER WATER
>
> When scoring dose and fluence differential in energy, there is a signal
> detected in the USRBIN and USRTRACK cards for electrons.
>
> I'm not sure what I may be doing wrong. I have used the DELTARAY card
> before with no issues. How can I set the simulations for no delta ray
> production?
>
> Example of input, output and result of USRTRACK card attached.
>
> (Many apologies if you are receiving this e-mail twice - I think my 1st
> attempt didn't go through.)
>
> Many thanks and best wishes,
> Ana
>
> ________________________________
> From: Ferreira De Almeida Lourenco, Ana <am.lourenco_at_ucl.ac.uk>
> Sent: 04 March 2021 12:09
> To: fluka-discuss_at_fluka.org <fluka-discuss_at_fluka.org>
> Subject: DELTARAY card
>
> Dear FLUKA experts,
>
> I'm simulating a proton beam in water with no deltaray production.
> DELTARAY -1. WATER WATER
>
> When scoring dose and fluence differential in energy, there is a signal
> detected in the USRBIN and USRTRACK cards for electrons.
>
> I'm not sure what I may be doing wrong. I have used the DELTARAY card
> before with no issues. How can I set the simulations for no delta ray
> production?
>
> Example of input, output and result of USRTRACK card attached.
>
> Many thanks and best wishes,
> Ana
>
>
Paola Sala
INFN Milano
tel. Milano +39-0250317374
tel. CERN +41-227679148
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Received on Wed Mar 17 2021 - 19:17:31 CET