HRRL radiation footprint simulations

Design a simulation to determine radiation footprint in HRRL cell.

1.) The ceiling is 4 feet thick

2.) there is PB shiedling between the HRRL accelerator room and the accelerator operator station

3.) the dirt is about 10 feet thick on the wall side where the accelerator is going to be mounted

4.) determine shielding wall thickness for HRRL cavity to reduce dose out the door

5.) Determine shielding for Tungsten converter

Drawing

Get a drawing from facilities documenting the shielding in that cell with dimensions

Denton Dance: x4710, may be able to provide drawings. B119 Beam Lab

Material Definitions

Concrete

Concrete has 6 elements and a density of 2.7 g/cm^3

! Concrete M_CON = 20 MIXT M_CON 'Concrete' 6 2.7

       1.0079 15.9994  26.981539 40.078 28.0855 55.8474
       1. 8. 13. 20. 14. 28.
         0.004 0.509 0.034 0.070 0.345 0.038

! Materials consisting of a single element are defined using the MATE command ! (see GEANT CONS100 writeup of the GSMATE subroutine for more details). ! The parameters of the command are: ! IMATE (integer) A unique user material number ! CHNAMA (character) A material name (up to 20 characters) ! A (real) atomic weight ! Z (real) atomic number ! DENS (real) density in g/cm**3 ! RADL (real) radiation length in cm ! ABSL (real) absorbtion length in cm (actually this is ignored by GEANT) ! NWBUF (integer) number of additional user parameters (can be 0) ! UBUF(i) (real) NWBUF values for the user parameters

Relative Rates

The first step in the simulation will be to compare relative radiation rates at the exit of the accelerator room. The radiation exiting the accelerator room before and after moving the accelerator will be simulated. Although all particles can be tracked we will mostly be interested in gamma and neutron fluxes through the door. The ratio of before/after moving fluxes for gamma and neutron should be plotted as a function of energy.