Monte Carlo-Based Field Calibration of Radiation Monitors for the Large Hadron Collider at CERN
| Autor: | C. Theis, Heinz Vincke, D. Lacarrère, Stefan Roesler, D. Forkel-Wirth |
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| Rok vydání: | 2009 |
| Předmět: |
Physics
Nuclear and High Energy Physics Large Hadron Collider Equivalent dose business.industry Nuclear engineering Monte Carlo method Ranging Condensed Matter Physics Nuclear physics Nuclear Energy and Engineering Electromagnetic shielding Calibration Radiation monitoring Radiation protection business |
| Zdroj: | Nuclear Technology. 168:713-718 |
| ISSN: | 1943-7471 0029-5450 |
| Popis: | Operating a high-energy accelerator like the Large Hadron Collider (LHC) requires a state-of-the-art monitoring system for radiation protection. In the vicinity of the accelerator as well as in the accessible areas behind thick shielding, a unique mixed radiation environment is encountered that consists of different particle types with energies ranging from fractions of electron volt up to several giga-electron-volts. Consequently, the correct assessment of ambient dose equivalent poses a challenging task and requires appropriate field-specific calibration methods, in particular as no adequate calibration sources exist. This circumstance motivated the development of a more accurate field calibration method for the LHC, based on benchmarked FLUKA Monte Carlo simulations. The method of obtaining such field calibration coefficients for IG5 high-pressure ionization chambers is exemplified in a case study for the LHCb experiment. Comparing these factors to calibration source―based values shows over- or underestimation of the actual dose by the source-based coefficient, depending on the location of the monitor. |
| Databáze: | OpenAIRE |
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