Abstract
A new experiment, named WAGASCI can precisely measure the ratio of muon neutrino cross sections between water and hydrocarbon for charged-current interactions with a large angular acceptance at J-PARC. A new detector mainly consists of two water target modules and two hydrocarbon target modules. Each module is composed of scintillators aligned in a 3D grid-like structure having almost 4π solid angle acceptance. Each scintillator has a groove for a WLS fiber to be put on, and they are glued with the optical cement by using a semi-automated gluing system. WLS fibers are connected to Multi-Pixel Photon Counters (MPPCs), which are crosstalk suppression type. The detector is now under construction, and we will start taking the data in 2017.
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