Development and operational experience of magnetic horn system for T2K experiment

Abstract

A magnetic horn system to be operated at a pulsed current of 320 kA and to survive high-power proton beam operation at 750 kW was developed for the T2K experiment. The first set of T2K magnetic horns was operated for over 12 million pulses during the four years of operation from 2010 to 2013, under a maximum beam power of 230 kW, and $6.63\times 10^{20}$ protons were exposed to the production target. No significant damage was observed throughout this period. This successful operation of the T2K magnetic horns led to the discovery of the ${\nu }_{\mu }\to {\nu }_e$ oscillation phenomenon in 2013 by the T2K experiment. In this paper, details of the design, construction, and operation experience of the T2K magnetic horns are described.

22 pages, 40 figures, also submitted to Nuclear Instrument and Methods in Physics Research, A

References in corpus (3)

• The T2K Experiment
• Observation of Electron Neutrino Appearance in a Muon Neutrino Beam
• The T2K Neutrino Flux Prediction

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• Measurement of neutrino and antineutrino neutral-current quasielastic-like interactions on oxygen by detecting nuclear de-excitation $\gamma$-rays
• Design and diagnostics of high-precision accelerator neutrino beams
• Three-flavour oscillations with accelerator neutrino beams
• T2K measurements of muon neutrino and antineutrino disappearance using $3.13\times 10^{21}$ protons on target
• J-PARC Neutrino Beamline Upgrade Technical Design Report
• A new electron-multiplier-tube-based beam monitor for muon monitoring at the T2K experiment