Comparison of measurement and simulation of ATLAS cavern radiation background

Abstract Sixteen Medipix2 pixel detector based (MPX) devices were operated at various positions within the ATLAS and cavern continuously from early 2008 up to 2013. In addition photons, each MPX is capable detect charged particles, neutrons as it covered with a mask of converter materials dividing its area into regions sensitive thermal or fast neutrons. The network was effectively used for real-time measurements spectral characteristics composition complex radiation fields in ATLAS. This article reports comparison results performed detectors during LHC operation period 2010 2011 Monte Carlo simulations FLUGG GCALOR codes. For purpose this comparison, tracking mode low threshold (8–10 keV) allowing one distinguish among particle categories on recognition track patterns left by particles layer. shows that agreement between measured simulated data satisfactory most cases factor two.