Time projection chambers for the T2K near detectors

Abgrall, N.; Andrieu, Bernard; Baron, P.; Béné, P.; Berardi, V.; Beucher, J.; Birney, P.; Blaszczyk, F. d. M.; Blondel, A.; Bojechko, C.; Boyer, M.; Cadoux, F.; Calvet, D.; Catanesi, M. G.; Cervera, A.; Colas, P.; Broïse, Xavier de la; Delagnes, É.; Delbart, A.; Marco, M. Di; Druillole, F.; Dumarchez, J.; Emery, S.; Escudero, L.; Faszer, W.; Ferrère, D.; Ferrero, A.; Fransham, K; Gaudin, A.; Giganti, C.; Giomataris, I.; Giraud, J.; Goyette, M.; Hamano, K.; Hearty, C.; Henderson, R.; Herlant, S.; Ieva, M.; Jamieson, B.; Mañas, G. Jover; Karlen, D.; Kato, I.; Konaka, A.; Laihem, K.; Langstaff, R.; Laveder, M.; Coguie, A. Le; Dortz, O. Le; Ross, M. Le; Lenckowski, M.; Lux, T.; Macaire, M.; Mahn, Kendall; Masciocchi, F.; Mazzucato, E.; Mezzetto, M.; Miller, Arthur I.; Mols, J. P.; Monfregola, L.; Monmarthe, E.; Myslik, J.; Nizery, F.; Openshaw, R.; Perrin, E.; Pierre, F.; Pierrepont, D.; Poffenberger, P.; Popov, Б.; Radicioni, E.; Ravonel, M.; Reymond, J. M.; Ritou, J. L.; Roney, J. M.; Roth, Stefan; Sánchez, F.; Sarrat, A.; Schroeter, R.; Stahl, A.; Stamoulis, P.; Steinmann, J.; Terhorst, D.; Terront, D.; Tvaskis, V.; Usseglio, M.; Vallereau, A.; Vasseur, G.; Wendland, J.; Wikström, G.; Zito, M.

doi:10.1016/j.nima.2011.02.036

Cited by 215 publications

(117 citation statements)

References 17 publications

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“…For the Ds-ECal (barrel-ECal), the muons selected are 'through-going' muons that have one track component in each of the three TPC modules and the Ds-ECal (barrel-ECal). Additionally, the track must appear 'muon-like' to the TPC [12]. The electron sample is produced by looking at photon pair production in the FGD [13], requiring tracks with opposite charge, at least one TPC component in the track, and that the TPC component appears 'electron-like'.…”

Section: Particle Identificationmentioning

confidence: 99%

“…The tracker comprises three time projection chambers (TPCs) [12] interspersed with two fine-grained detectors (FGDs) [13] to provide target mass, surrounded by an electromagnetic calorimeter (ECal). The P / 0D, TPCs, FGDs and downstream ECal (Ds-ECal) are mounted in a supporting structure or 'basket' which sits inside the UA1 magnet, while the surrounding barrel-and P / 0D-ECal are affixed to the magnet yoke, which splits vertically as shown in figure 1 to provide access for installation and maintenance.…”

Section: Introductionmentioning

confidence: 99%

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The electromagnetic calorimeter for the T2K near detector ND280

et al. 2013

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The T2K experiment studies oscillations of an off-axis muon neutrino beam between the J-PARC accelerator complex and the Super-Kamiokande detector. Special emphasis is placed on measuring the mixing angle θ 13 by observing ν e appearance via the sub-dominant ν µ → ν e oscillation and searching for CP violation in the lepton sector. The experiment includes a sophisticated, off-axis, near detector, the ND280, situated 280 m downstream of the neutrino production target in order to measure the properties of the neutrino beam and to understand better neutrino interactions at the energy scale below a few GeV. The data collected with the ND280 are used to study charged-and neutral-current neutrino interaction rates and kinematics prior to oscillation, in order to reduce uncertainties in the oscillation measurements by the far detector. A key element of the near detector is the ND280 electromagnetic calorimeter (ECal), consisting of active scintillator bars sandwiched between lead sheets and read out with multi-pixel photon counters (MPPCs). The ECal is vital to the reconstruction of neutral particles, and the identification of charged particle species. The ECal surrounds the Pi-0 detector (P / 0D) and the tracking region of the ND280, and is enclosed in the former UA1/NOMAD dipole magnet. This paper describes the design, construction and assembly of the ECal, as well as the materials from which it is composed. The electronic and data acquisition (DAQ) systems are discussed, and performance of the ECal modules, as deduced from measurements with particle beams, cosmic rays, the calibration system, and T2K data, is described.

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Section: Particle Identificationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The electromagnetic calorimeter for the T2K near detector ND280

et al. 2013

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“…The detector rests within the refurbished UA1=NOMAD magnet, which provides a magnetic field of 0.2 T, and is split into two regions: the upstream π 0 detector [25] and the tracker. The tracker region contains two plastic scintillator detectors [26] [fine grained detectors (FGDs)], used as targets for neutrino interactions, sandwiched between three argon-gas time projection chambers (TPCs) [27]. The first, most upstream, FGD (FGD1) only has layers of plastic (CH) scintillator bars while the second FGD (FGD2) also contains water layers.…”

mentioning

confidence: 99%

Measurement of Coherent π+ Production in Low Energy Neutrino-Carbon Scattering

Abe¹,

Andreopoulos²,

Antonova³

et al. 2016

Phys. Rev. Lett.

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“…It is composed of a number of subdetectors installed inside the refurbished UA1/NOMAD magnet, which provides a magnetic field of 0.2 T. The central subdetectors form a tracking detector, composed of two fine-grained scintillator detectors (FGDs [15]) and three time projection chambers (TPCs [16]). The FGDs are used as the target for the neutrino interactions, and while the upstream FGD (FGD1) is composed solely of scintillator bars, the downstream FGD (FGD2) also contains water layers.…”

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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Time projection chambers for the T2K near detectors

Cited by 215 publications

References 17 publications

The electromagnetic calorimeter for the T2K near detector ND280

The electromagnetic calorimeter for the T2K near detector ND280

Measurement of Coherent π+ Production in Low Energy Neutrino-Carbon Scattering

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

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