NEUTRINO2010, XXIV International Conference on Neutrino Physics and Astrophysics, Athens, GREECE

Development of the new T2K on-axis neutrino detector "INGRID proton module"

Not scheduled

Aithousa Mitropoulos

Speaker

Mr Tatsuya Kikawa (Kyoto University)

Description

The T2K (Tokai-to-Kamioka) long baseline neutrino oscillation experiment started in April 2009. T2K is aiming to measure the oscillation parameters associated with muon neutrino disappearance precisely and to search for electron neutrino appearance. A high intensity neutrino beam from J-PARC (Japan Proton Accelerator Research Complex) is measured with the 280m near detector complex (ND280) and the 295km far detector (Super-Kamiokande). We have constructed INGRID (Interactive Neutrino GRID) on-axis neutrino beam monitor in the ND280 to monitor the neutrino beam direction within 1 mrad. INGRID consists of 16 identical modules and covers the 5m region from the beam center with large target mass (116ton). Each module has the sandwich structure of iron target plates and scintillator tracking plates. Charged particles other than muon, like proton and pion from neutrino interactions can not be detected by INGRID because they are stopped in the iron plates, so we are developing a new on-axis neutrino detector, "INGRID proton module", to detect them and distinguish neutrino interaction modes. The proton module (1.9m^3, 1.4ton) which consists of 1204 plastic scintillator bars with Fiber-MPPC (Multi-Pixel Photon Counter) readout will be constructed and will make its first test run in the summer 2010. We will report the expected performance of "INGRID proton module".