%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 (GI) & Discussions (GID)
%D 2013
%I Copernicus Publications
%R 10.5194/gi-2-29-2013
%X In order to investigate the complex nature of landslides triggered by rainfall, dynamic muon radiography of the motion of the underground water table is planned in a drainage tunnel drilled underneath an estimated fault plane. However, the humidity inside the tunnel is almost 100%. In order to suppress moisture effects, a scintillation counter with Cockcroft¨CWalton photomultipler tubes (CW-MPT) was developed and tested at the observation site located in Shizuoka Prefecture, Japan. 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 water gauge measurements 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.net/2/29/2013/gi-2-29-2013.html