%0 Journal Article
%T Development and operation of a muon detection system under extremely high humidity environment for monitoring underground water table
%A H. K. M. Tanaka
%A A. Sannomiya
%J Geoscientific Instrumentation, Methods and Data Systems Discussions
%D 2012
%I Copernicus Publications
%R 10.5194/gid-2-719-2012
%X In order to investigate the complex nature of the landslides triggered by rainfall, dynamic muon radiography of the motion of the underground water table is performed in a the drainage tunnel drilled underneath an the estimated fault plane. However, the humidity inside the tunnel is almost 100%. In order to suppress the moisture effect, a scintillation counter with Cockcroft-Wwalton photomultipler tubes (CW-MPT) was developed and tested at the observation site. The counter was stably operated for 38 days without gain degrading. Based on the result, we constructed a muon detection system with CW-PMTs at the same site and started operation runs. In this work, the data from borehole-based measurement of the underground water levels were analyzed and discussed. It was confirmed that the comparison between muon and borehole data would be useful.
%U http://www.geosci-instrum-method-data-syst-discuss.net/2/719/2012/gid-2-719-2012.pdf