Underground Water Cherenkov Muon Detector Array with the Tibet Air Shower Array for Gamma-Ray Astronomy in the 100 TeV Region

The Tibet AS Gamma Collaboration, M. Amenomori

We propose to build a large water-Cherenkov-type muon-detector array (Tibet MD array) around the 37,000 m${}^2$ Tibet air shower array (Tibet AS array) already constructed at 4,300…