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FLUKA benchmark study of radiation environment inside CMS cavern

FLUKA benchmark study of radiation environment inside CMS cavern. Christina Urscheler Radiation Protection Group CERN. Overview. Motivation: Radiation field: hazard to people and damage to material Work: Monte Carlo simulation study of radiation environment in CMS cavern

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FLUKA benchmark study of radiation environment inside CMS cavern

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  1. FLUKA benchmark study of radiation environment inside CMS cavern Christina Urscheler Radiation Protection Group CERN

  2. Overview Motivation: Radiation field: hazard to people and damage to material Work: Monte Carlo simulation study of radiation environment in CMS cavern Comparison of selected results to measured data from 2010 and 2011

  3. Hazard to people: Goal: ALARA: As Low As Reasonable Possible CERN limit for radiation worker: 6 mSv/year

  4. Hazard to sensitive devices and materials: • Cumulative damage • Lattice displacements • Energy deposition • Stochastic failures • Single Event Effects (SEE) (electron-hole pairs in semiconductor)

  5. FLUKA results:Dose equivalent rate during LHC operation / [uSv/pp-collision] x uSv/pp collision z

  6. 8 PMI chambers inside CMS cavern Installation of passive and active dosimeters in CMS cavern: Installation of material samples (Cu, Ag, Pb, Al and Stainless Steel) in 23 different locations http://ramses-temp.web.cern.ch/ramses-temp/LHC/point5.htm y z

  7. Data 2011 Simulation Results / Data 2010 resp. 2011

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