The MonRAt telescope for atmospheric radiation

摘要

The atmospheric radiation monitor MonRAt is a compact telescope being built in Brazil and designed todetect photons generated in the atmosphere by ultra-high energy cosmic ray showers. It is composed by a parabolicmirror focusing light onto a 64-pixel multianodic photomultiplier tube and ultraviolet-passing filters positioned in frontof the photocathode. The data acquisition system consists of a set of pre-amplifiers and FPGA-based boards able torecord trigger times and waveforms from each channel and send the data to a computer by USB ports. MonRAt is beingdesigned to detect air fluorescence radiation under different atmospheric and geographic conditions and contribute to thestudy of the fluorescence radiation yield. Also planned are Cherenkov radiation measurements and monitoring of theatmosphere in the lidar mode.