Design and performance of the muon monitor for the T2K neutrino oscillation experiment

Matsuoka, K.; Ichikawa, A. K.; Kubo, H.; Maeda, Keisuke; Maruyama, T.; Matsumura, C.; Murakami, Akira; Nakaya, T.; Nishikawa, K.; Ozaki, T.; Sakashita, K.; Suzuki, K.; Suzuki, Shoji; Tashiro, Koichiro; Yamamoto, K.; Yokoyama, M.

doi:10.1016/j.nima.2010.09.074

Cited by 37 publications

(27 citation statements)

References 14 publications

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“…The precision on the center of the muon profile is 2.95 cm, which corresponds to 0.25 mrad precision on the beam direction. The details of this monitor are described in [17].…”

Section: Secondary Beam Monitoringmentioning

confidence: 99%

Publisher’s Note: T2K neutrino flux prediction [Phys. Rev. D87, 012001 (2013)]

Abe¹,

Abgrall²,

Aihara³

et al. 2013

Phys. Rev. D

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117

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The Tokai-to-Kamioka (T2K) experiment studies neutrino oscillations using an off-axis muon neutrino beam with a peak energy of about 0.6 GeV that originates at the J-PARC accelerator facility. Interactions of the neutrinos are observed at near detectors placed at 280 m from the production target and at the far detector -Super-Kamiokande (SK) -located 295 km away. The flux prediction is an essential part of the successful prediction of neutrino interaction rates at the T2K detectors and is an important input to T2K neutrino oscillation and cross section measurements. A FLUKA and GEANT3 based simulation models the physical processes involved in the neutrino 3 production, from the interaction of primary beam protons in the T2K target, to the decay of hadrons and muons that produce neutrinos. The simulation uses proton beam monitor measurements as inputs. The modeling of hadronic interactions is re-weighted using thin target hadron production data, including recent charged pion and kaon measurements from the NA61/SHINE experiment. For the first T2K analyses the uncertainties on the flux prediction are evaluated to be below 15% near the flux peak. The uncertainty on the ratio of the flux predictions at the far and near detectors is less than 2% near the flux peak.

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“…The precision on the center of the muon profile is 2.95 cm, which corresponds to 0.25 mrad precision on the beam direction. The details of this monitor are described in [17].…”

Section: Secondary Beam Monitoringmentioning

confidence: 99%

Publisher’s Note: T2K neutrino flux prediction [Phys. Rev. D87, 012001 (2013)]

Abe¹,

Abgrall²,

Aihara³

et al. 2013

Phys. Rev. D

Self Cite

117

View full text Add to dashboard Cite

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“…A muon neutrino beam is produced from the decay of charged pions and kaons generated by 30 GeV proton collisions on a graphite target and focused by three magnetic horns. Downstream of the horns is the decay volume, 96 meters in length, followed by the beam dump and muon monitors (MUMON [12]). The neutrino beam illuminates an on-axis near detector (INGRID [13]), an off-axis near detector (ND280) and an off-axis far detector (Super-Kamiokande [14]).…”

mentioning

confidence: 99%

Measurement of the Inclusive Electron Neutrino Charged Current Cross Section on Carbon with the T2K Near Detector

Abe¹,

Adam²,

Aihara³

et al. 2014

Phys. Rev. Lett.

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The T2K off-axis near detector, ND280, is used to make the first differential cross-section measurements of electron neutrino charged current interactions at energies ∼1 GeV as a function of electron momentum, electron scattering angle and four-momentum transfer of the interaction. The total flux-averaged νe charged current cross-section on carbon is measured to be σ φ = 1.11 ± 0.09 (stat) ± 0.18 (syst) × 10 −38 cm 2 /nucleon. The differential and total crosssection measurements agree with the predictions of two leading neutrino interaction generators, 3 NEUT and GENIE. The NEUT prediction is 1.23 × 10 −38 cm 2 /nucleon and the GENIE prediction is 1.08 × 10 −38 cm 2 /nucleon. The total νe charged current cross-section result is also in agreement with data from the Gargamelle experiment.PACS numbers: 14.60. Pq, 14.60.Lm, 25.30.Pt, 29.40.Ka Introduction-T2K is a long baseline neutrino oscillation experiment measuring ν e appearance and ν µ disappearance from a ν µ beam. Neutrino oscillations are described by a mixing matrix parametrized by three mixing angles and a CP violating phase, δ CP [1,2]. The three mixing angles have been measured to better than 10% precision [3], and measuring δ CP is currently a major goal in neutrino physics [4].Future ν e appearance measurements can be used to search for CP violation in neutrino interactions, and these rely on precise understanding of both ν µ and ν e charged-current (CC) interaction cross-sections at energies ∼1 GeV. Many ν µ cross-section measurements have been made at the GeV scale, both of the total CC inclusive cross-section and of individual interaction modes (see Ref.[5] for a review of cross-section data, and Refs. [6][7][8] for recent results). Only the Gargamelle experiment has measured the ν e CC inclusive cross-section at the GeV scale [9], and there are currently no ν e differential crosssection results as a function of the electron kinematics. Theoretical differences are expected between ν e and ν µ cross-sections [10], and measuring these with data is critical to understand the systematic uncertainties related to the search for CP violation in the lepton sector. The uncertainty in ν e cross-sections will become increasingly important in future oscillation experiments as statistical and other systematic uncertainties are reduced.In this Letter we present the first ν e CC inclusive differential cross-section measurements for neutrinos with energy ∼1 GeV as a function of the electron momentum (p e ), electron scattering angle (cos(θ e )) and the fourmomentum transfer of the interaction (Q 2 ). The total flux-averaged CC inclusive cross-section is also presented.T2K Experiment-T2K [11] operates from the J-PARC facility in Tokai, Japan. A muon neutrino beam is produced from the decay of charged pions and kaons generated by 30 GeV proton collisions on a graphite target and focused by three magnetic horns. Downstream of the horns is the decay volume, 96 meters in length, followed by the beam dump and muon monitors (MUMON [12]). The neutrino beam illuminates ...

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“…This was cut into two films, each 125 mm × 100 mm, and both were vacuum-packed with laminated shading films. The chamber was set at the muon pit for the T2K neutrino oscillation experiment in J-PARC [11]. A test beam was shot toward the neutrino beam line.…”

Section: Muon Beam Testmentioning

confidence: 99%

Latest emulsion detector for cosmic ray observation: high sensitive emulsion film and high speed readout system

Rokujo¹

2016

Proceedings of the 34th International Cosmic Ray Conference — PoS(ICRC2015)

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A nuclear emulsion is used in a high-resolution 3D tracking device. AgBr crystals of 0.2 µm size that are penetrated by a charged particle grow, via a chemical development process, into 0.8 µm silver grains that can be observed as a track by using a microscope. Recent fully automated readout systems have enabled not only high-resolution measurements but also large-scale experiments (accelerator and balloon-borne experiments, cosmic ray muon radiography, etc.). Since 2010, properties of the emulsion detector have drastically changed. We have introduced a system of nuclear emulsion gel production to the laboratory in Nagoya University, Japan, and have started self-development and supply of the new gel, instead of relying on photographic film companies. We have also developed a next-generation readout system, the Hyper Track Selector (HTS). The scanning speed is designed to be 0.9 m 2 /h (100 times faster than the current system). GammaRay Astro-Imager with Nuclear Emulsion (GRAINE) is a cosmic gamma-ray observation project that uses a balloon-borne emulsion detector. The angular resolution of the emulsion gamma-ray telescope (0.08 • @ 1-2 GeV) is one order of magnitude higher than that of the Fermi-LAT. In addition, it has polarization sensitivity using the pair creation mode. A search for exotic particles and measurements of short-lived particle production rates in cosmic rays at balloon altitudes will be also conducted. In the second GRAINE balloon-borne experiment in 2015 May, 50 m 2 of the new highly sensitive emulsion films were used for the medium-scale gamma-ray telescope (aperture area 3600 cm 2 ), with which we demonstrate the imaging performance. We present the status of the latest emulsion detector and readout system based on results of performance tests conducted for the GRAINE balloon-borne experiment in 2015.

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Design and performance of the muon monitor for the T2K neutrino oscillation experiment

Cited by 37 publications

References 14 publications

Publisher’s Note: T2K neutrino flux prediction [Phys. Rev. D87, 012001 (2013)]

Publisher’s Note: T2K neutrino flux prediction [Phys. Rev. D87, 012001 (2013)]

Measurement of the Inclusive Electron Neutrino Charged Current Cross Section on Carbon with the T2K Near Detector

Latest emulsion detector for cosmic ray observation: high sensitive emulsion film and high speed readout system

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