[fluka-discuss]: Proton shielding

From: Valerio Santoro <valerio.santoro_at_studio.unibo.it>
Date: Fri, 23 Mar 2018 11:36:56 +0000

Dear Fluka experts,

I am trying to simulate a concrete shielding for a proton beam of 200 MeV impinging on an iron target. I am using the point-source line of-sight model, building a concrete sphere around my target. This simulation aims to score the fluence before the shielding and outside the shielding, in order to compare the results with the analytical Moyer's model. Outside my shielding I create a sphere filled with vacuum, in order to create a scoring region outside the shielding. What I am doing is to estimate the neutron fluence, function of the angle in sr in the USRBDX scoring option, in order to get the fluence in each bin from the tab_lis output file to convert in ambient dose if it is possible. I am suppose to do a "simple" simulation, just to find a kind of agreement with the literature, but from my results I get the following:

  1. When I try to score in USRBDX the fluence of All-part, I get an error, I can only see neutron fluence plots;
  2. The values provided in the tab_lis file are the same before the shielding, and after the shielding.

Probably different things in the set-up are wrong, in the definition of the geometry, or I have to activate other cards for biasing or for neutron transport, but could anyone help me to fix the errors, in order to solve the problem in a simple way? I attach the input and flair files, thank you very much in advance,


Valerio Santoro




__________________________________________________________________________
You can manage unsubscription from this mailing list at https://www.fluka.org/fluka.php?id=acc_info

Received on Fri Mar 23 2018 - 14:01:45 CET

This archive was generated by hypermail 2.3.0 : Fri Mar 23 2018 - 14:01:47 CET