[fluka-discuss]: RESNUCL with LAM-BIAS

From: <hayley.smith_at_stfc.ac.uk>
Date: Mon, 16 Feb 2015 16:44:29 +0000


I am trying to look at the residual nuclei produced when a 70 MeV proton beam repeatedly passes through a thin (on the order of microns) foil. I am trying to understand the different residuals, and proportions of residuals, produced by different foil materials (carbon, aluminium etc) and I have a few questions about my methods:

From reading many of the previous FLUKA discuss posts I have understood that on these short length scales it is necessary to use LAM-BIAS to reduce the nuclear interaction length. At 70 MeV the .out file showed that the inelastic interaction length was 34.31 cm in carbon so I reduced the interaction length by 1e-6 using the LAM-BIAS card. Is this a reasonable scaling factor?

I am now looking at the RESNUCL output that I get but am confused about interpreting the results, even after consulting previous discussion list posts and the notes from the most recent course. I have tried repeating the simulation with LAM-BIAS for different numbers of primary particles (1000 - 50000) and different scaling factors to get an understanding. In my simulation I assume a proton distribution of 1.25e15 protons per second. I have looked at the .out files and .lis files but I am still unsure - do I need to apply any weighting to the RESNUCL output or has this already been taken into account when the Bq/cc are processed?

And are there any other settings that I may be missing in my very simple input file (attached) that would allow me to get a useful simulation of the residuals?

Many thanks for any clarification you are able to give,


Hayley Smith
ISIS Facility
Rutherford Appleton Laboratory
Harwell Oxford
OX11 0QX

01235 445524

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

Received on Mon Feb 16 2015 - 17:44:29 CET

This archive was generated by hypermail 2.3.0 : Mon Feb 16 2015 - 19:45:36 CET