Induced radioactivity in ATLAS cavern measured by MPX detector network

An application of the use of MPX detectors for the measurement of induced radioactivity in the Large Hadron Collider (LHC) experiment environment is presented. The sixteen ATLAS-MPX detectors measured the associated photon ambient dose equivalent rate (H*(10) rate) in ATLAS due to the LHC operation. It is presented that in 2010 the average H*(10) rate determined with all MPX detectors varies around 0.015 mu Sv/h in the ATLAS cavern. In 2013, roughly after 50 days from the end of high luminosity physics runs, the highest H*(10) rate measured with the MPX detectors has reached 14.9 mu Sv/h (in inner detector region). All the other dedicated MPX detectors measured H*(10) rate which reached the value up to 1.3 mu Sv/h, depending on the MPX detector.