Measurements and estimates of the radiation levels in the CMS Experimental Cavern using Medipix and RAMSES monitors, and the FLUKA Monte Carlo code

Highlights of the work performed for the BRIL project which include FLUKA simulations, background measurements and investigations, and benchmarking activities. Activation simulations with a simple fix for the well known silver isomer problem in FLUKA were performed for the tracker bulkhead region and compared with measurements of the residual dose rates taken in (E)YETS 17/18. Measurements from the RAMSES monitors are compared with FLUKA predictions for the mixed radiation field. Using non-standard FLUKA output, timing information for simulated particles arriving at ME4/2 have been produced with an extensive simulation run. First analysis has been performed, demonstrating how the information can be used to help determine the source of background and support future shielding studies. Changes in the year to year RAMSES readings are investigated to understand the effect of various shielding elements added. Lastly, the Medipix based neutron camera was investigated to obtain the neutron flux.