Communication Architecture of a system to find persons inside ATLAS
Carlos Cardeira, O. Beltramello, H. Burckhart, S. Franz, G. P. Benincasa, A. Maio · 2006
ATLAS is a high energy particle detector of unprecedented size and complexity that is under construction at CERN, in the Geneva area. The detector is housed in a cavern of about 50000 m3 at 100 m under ground. During the maintenance periods it is expected that up to 150 people could be present in the cavern at the same time, most of them working inside the intricacies of the detector and completely hidden and invisible from outside. In case of emergency, especially if smoke or fog (leaks of cryogenic fluids) are present, it could be extremely difficult and dangerously long for a rescue team to locate every person who could be in danger. Under these circumstances, a granular system for finding persons is then mandatory. FPIAA (Finding Persons Inside ATLAS Areas) is based on a large number (at the present about 400) of Passive InfraRed sensors, each one detecting the presence of a person in a relatively small volume and distributed to cover the most critical locations in the cavern. The information is collected by a computer system and is sent to the Control Room where the operator can follow on a synoptic screen the movements of the persons in the cavern and inside ATLAS. This paper presents the communication architecture that was used for this project. 1.