Analyzing the Efficiency of the Forward Radiation Shielding for the CMS Detector at the LHC

The forward radiation shielding of the CMS detector is developed for the LHC by the Institute for High-Energy Physics. The efficiency of this shielding is analyzed on the basis of the results of numerical simulation. The computed particle-flux densities are compared to those of the ideal model of the shielding. The secondary-radiation field near the detector is investigated with different configurations of the shielding. Measures for reinforcing the shielding of the detector's experimental zone are proposed. The possibilities of improving the shielding structure and the composition of its materials are discussed.