Dear FLUKA Experts,
Recently, while utilizing the FARM module of Flair, I encountered a peculiar issue.
I conducted an simulation where a 15 MeV electron beam bombarded a tungsten target, resulting in the production of gamma rays. These gamma rays subsequently underwent photonuclear reactions with the tungsten, releasing neutrons.
To analyze the distributions of both neutrons and photons, I employed the USRBIN card. Within the FARM module, I utilized body27 to excise a portion of the geometric model, aiming to observe the distributions of neutrons and photons.
However, I was able to observe the photon distribution within FARM but failed to detect the neutron distribution. Conversely, when plotting the two-dimensional USRBIN graph in the plot module, the neutron distribution was visible.
I am uncertain about the underlying cause of this phenomenon and hope that the experts can provide some insights to resolve my confusion.
Thank you very much.
Fig 1 Photon distribution in FARM
Fig 2 Neutron distribution in FARM
Fig 2 Neutron distribution in plot
Flair flie:
White source.flair (11.5 KB)