Abstract
The graphite target of the J-PARC neutrino beam-line for the long base-line neutrino-oscillation experiment, T2K is developed. The graphite target is designed to withstand the exposure of high intensity protons beam from J-PARC accelerator. The Helium gas cooling is adopted to minimize the radiation damage of the graphite. J-PARC neutrino beam-line is operated from April 2009. The first target was used for 6.7 × 1020 protons-on-target without significant trouble, while the maximum number of protons per pulse is 1.2 × 1020 with 2.48 s cycle.
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