Measurement of the muon beam direction and muon flux for the T2K neutrino experiment

Abstract

The Tokai-to-Kamioka (T2K) neutrino experiment measures neutrino oscillations by using an almost pure muon neutrino beam produced at the J-PARC accelerator facility. The T2K muon monitor was installed to measure the direction and stability of the muon beam which is produced together with the muon neutrino beam. The systematic error in the muon beam direction measurement was estimated, using data and MC simulation, to be 0.28 mrad. During beam operation, the proton beam has been controlled using measurements from the muon monitor and the direction of the neutrino beam has been tuned to within 0.3 mrad with respect to the designed beam-axis. In order to understand the muon beam properties,measurement of the absolute muon yield at the muon monitor was conducted with an emulsion detector. The number of muon tracks was measured to be $(4.06\pm 0.05)\times 10^4$ cm${}^{-2}$ normalized with $4\times 10^{11}$ protons on target with 250 kA horn operation. The result is in agreement with the prediction which is corrected based on hadron production data.

References in corpus (2)

• The T2K Neutrino Flux Prediction
• Design and performance of the muon monitor for the T2K neutrino oscillation experiment

Cited by in corpus (7)

• First combined analysis of neutrino and antineutrino oscillations at T2K
• Measurement of neutrino and antineutrino oscillations by the T2K experiment including a new additional sample of ${\nu }_e$ interactions at the far detector
• Measurement of double-differential muon neutrino charged-current interactions on C${}_8$H${}_8$ without pions in the final state using the T2K off-axis beam
• Measurement of neutrino and antineutrino neutral-current quasielastic-like interactions on oxygen by detecting nuclear de-excitation $\gamma$-rays
• T2K measurements of muon neutrino and antineutrino disappearance using $3.13\times 10^{21}$ protons on target
• A new electron-multiplier-tube-based beam monitor for muon monitoring at the T2K experiment
• Performance evaluation of electron multiplier tubes as a high-intensity muon beam monitor of accelerator neutrino experiments