Abstract
The WILLI calorimeter, installed in NIPNE Bucharest, is operated since several years for measuring charge ratio of atmospheric muons at low energies (E<1 GeV), particularly exploring its directional dependence. Measurements of the muon flux are compared with Monte‐Carlo simulation with CORSIKA code. Recently WILLI detector is proposed to get extended with a by mini‐array of 12 scintillators (WILLI‐EAS) in order to measure muon charge ratio of the muon density of EAS lateral distributions. Experimental studies of this kind could provide detailed information on the shower development under the influence of the geomagnetic field and also on features of the hadronic interaction.
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