Title :
Monte Carlo based formula for radiation shielding assessment in the forward direction
Author :
Wilkinson, C. ; Fitzgerald, D. ; Frankle, S. ; Hutson, R. ; Macek, R.
Author_Institution :
Medium Energy Phys. Div., Los Alamos Nat. Lab., NM, USA
Abstract :
Monte Carlo simulations of 800-MeV proton beam spills in common shielding materials show that neutron dose equivalent rates in the forward direction can be characterized by a Moyer Model-like formula. Particle transport codes were used to determine the neutron flux at depths up to 6 meters and for production angles from 0° to 30° for primary proton-beam spills on cylindrical beam stops. The flux was then converted to dose equivalent rate as a function of depth and angle. The results for three common shielding materials were combined and the resulting fitted formula provides a quick method for estimating the dose equivalent rates and shielding effectiveness outside thick shielding at forward angles
Keywords :
Monte Carlo methods; neutron flux; proton accelerators; radiation monitoring; shielding; 800 MeV; LAMPF; Monte Carlo simulations; Moyer Model-like formula; cylindrical beam stops; forward direction; neutron dose equivalent rates; neutron flux; particle transport codes; primary proton-beam spills; radiation shielding; Concrete; Geometry; History; Magnetic materials; Monte Carlo methods; Neutrons; Particle beams; Particle production; Physics; Protons;
Conference_Titel :
Particle Accelerator Conference, 1993., Proceedings of the 1993
Conference_Location :
Washington, DC
Print_ISBN :
0-7803-1203-1
DOI :
10.1109/PAC.1993.309274
