Radiation shielding study against gas bremsstrahlung for the BMIT POE3 at the Canadian light source

A tungsten beam stop, two safety shutters, and a lead movable wall are placed in the POE3 for the safe operation of the BMIT beamline. However, for one particular mode of operation, gas bremsstrahlung and monochromatic X-ray beams propagate closely together until the former is stopped by the tungsten beam stop while the safety shutters remain open to allow the passage of the latter to the experimental area SOE1. It is thus imperative to know the anticipated dose rate around the POE3, especially behind the back wall and on the roof. The dose rate estimates are presented based on a realistic model of the POE3 with its safety features.