Baby MIND: A magnetised spectrometer for the WAGASCI experiment

The WAGASCI experiment being built at the J-PARC neutrino beam line will measure the difference in cross sections from neutrinos interacting with a water and scintillator targets, in order to constrain neutrino cross sections, essential for the T2K neutrino oscillation measurements. A prototype Magnetised Iron Neutrino Detector (MIND), called Baby MIND, is being constructed at CERN to act as a magnetic spectrometer behind the main WAGASCI target to be able to measure the charge and momentum of the outgoing muon from neutrino charged current interactions.Comment: Poster presented at NuPhys2016 (London, 12-14 December 2016). Title + 4 pages, LaTeX, 6 figure

Baby MIND Experiment Construction Status

Baby MIND is a magnetized iron neutrino detector, with novel design features, and is planned to serve as a downstream magnetized muon spectrometer for the WAGASCI experiment on the T2K neutrino beam line in Japan. One of the main goals of this experiment is to reduce systematic uncertainties relevant to CP-violation searches, by measuring the neutrino contamination in the anti-neutrino beam mode of T2K. Baby MIND is currently being constructed at CERN, and is planned to be operational in Japan in October 2017.Comment: Poster presented at NuPhys2016 (London, 12-14 December 2016). 4 pages, LaTeX, 7 figure

Synchronization of the Distributed Readout Frontend Electronics of the Baby MIND Detector

Baby MIND is a new downstream muon range detector for the WGASCI experiment. This article discusses the distributed readout system and its timing requirements. The paper presents the design of the synchronization subsystem and the results of its test

Baby MIND: A magnetized segmented neutrino detector for the WAGASCI experiment

T2K (Tokai-to-Kamioka) is a long-baseline neutrino experiment in Japan designed to study various parameters of neutrino oscillations. A near detector complex (ND280) is located 280~m downstream of the production target and measures neutrino beam parameters before any oscillations occur. ND280's measurements are used to predict the number and spectra of neutrinos in the Super-Kamiokande detector at the distance of 295~km. The difference in the target material between the far (water) and near (scintillator, hydrocarbon) detectors leads to the main non-cancelling systematic uncertainty for the oscillation analysis. In order to reduce this uncertainty a new WAter-Grid-And-SCintillator detector (WAGASCI) has been developed. A magnetized iron neutrino detector (Baby MIND) will be used to measure momentum and charge identification of the outgoing muons from charged current interactions. The Baby MIND modules are composed of magnetized iron plates and long plastic scintillator bars read out at the both ends with wavelength shifting fibers and silicon photomultipliers. The front-end electronics board has been developed to perform the readout and digitization of the signals from the scintillator bars. Detector elements were tested with cosmic rays and in the PS beam at CERN. The obtained results are presented in this paper.Comment: In new version: modified both plots of Fig.1 and added one sentence in the introduction part explaining Baby MIND role in WAGASCI experiment, added information for the affiliation

Observation of an Excited Bc+ State

Using pp collision data corresponding to an integrated luminosity of 8.5 fb-1 recorded by the LHCb experiment at center-of-mass energies of s=7, 8, and 13 TeV, the observation of an excited Bc+ state in the Bc+π+π- invariant-mass spectrum is reported. The observed peak has a mass of 6841.2±0.6(stat)±0.1(syst)±0.8(Bc+) MeV/c2, where the last uncertainty is due to the limited knowledge of the Bc+ mass. It is consistent with expectations of the Bc∗(2S31)+ state reconstructed without the low-energy photon from the Bc∗(1S31)+→Bc+γ decay following Bc∗(2S31)+→Bc∗(1S31)+π+π-. A second state is seen with a global (local) statistical significance of 2.2σ (3.2σ) and a mass of 6872.1±1.3(stat)±0.1(syst)±0.8(Bc+) MeV/c2, and is consistent with the Bc(2S10)+ state. These mass measurements are the most precise to date

ВЛИЯНИЕ ТЕМПЕРАТУРЫ НА СОДЕРЖАНИЕ В ПОЧВЕ КАДМИЯ, СВИНЦА И УРАНА В ПОДВИЖНЫХ ФОРМАХ

The reserves of Cd, Pb and U in mobile forms (Memob) in the soils after keeping the soil samples at the fixed temperature in the range from –18 to +30 °C have been determined. It was established that in the air-dry conditions the reserves of Cdmob and Pbmob in the light loamy sod-podzol soil increased with increase of temperature up to +30 °C, and in peaty soil it was up to +15 °C with further insignificant decrease during subsequent temperature increase to +30 °C. At the same time, the reserve of Umob did not change in the sod-podzol soil and increased in the peaty soil up to +15 °С and decreased in both soils during further increase of temperature up to +30 °С. Установлен запас в почвах Сd, Pb и U в подвижных формах (Меподв) после выдерживания почвенных образцов при определенной температуре в интервале от –18 до +30 °С. Показано, что в воздушно-сухих условиях запас Сdподв и Pbподв в дерново-подзолистой легкосуглинистой почве увеличивался с ростом температуры до +30 °C, а в торфянистой почве – до +15 °C и незначительно сокращался при повышении температуры до +30 °C. При этом до +15 °С запас Uподв в дерново-подзолистой почве не менялся, а в торфянистой возрастал, сокращаясь в обеих почвах при дальнейшем подъеме температуры до +30 °С.

Характеристики дерново-подзолистых почв после внесения биоугля

The effect of biochar implementation into sandy and loamy-sand sod podzol soils on the soil acidity, total water capacity and concentration of exchangeable and mobile potassium and calcium has been investigated. It has been found that the biochar application caused the decrease in the soil acidity and also increases of the water capacity and concentrations of exchangeable and mobile potassium in sandy and sandy loam soils. The favorable conditions for growing agricultural plants in sandy-loam soil could be created with application of 3 w. % of biochar, but in sandy soils it can be reached with 5 w. % of biochar.Показано, что добавки биоугля в образцы песчаной и супесчаной разновидностей почв дерново-подзолистого типа в дозах 1-5 мас.% снижают кислотность почвенной среды, увеличивают влагоемкость и содержание обменного и подвижного калия. Влияние биоугля на кислотность среды и концентрацию обменного и подвижного калия более заметно проявилось в кислой песчаной почве, а на влагоемкость - в менее кислой супесчаной. Результаты выполненных исследований свидетельствуют о возможности использования биоугля в качестве мелиорирующей добавки к почве. Показано, что в супесчаной почве (по кислотности близкой к нейтральной) более благоприятные условия для выращивания сельскохозяйственных растений формируются после внесения биоугля 3 мас.%, тогда как для кислой песчаной почвы более предпочтительна доза 5 мас.%

Изменение форм нахождения и подвижности кадмия, свинца и урана в дерново-подзолистых почвах в результате внесения биоугля

By the chemical fractionation method, the effect of 1-5 w. % of biochar addition to sandy and sandy-loam sod podzol soils on the Сd, Pb and U reserves in exchangeable (sorbed reversibly) and mobile (conditionally bioavailable) forms has been investigated. It has been found that, under conditions favorable for growing of agricultural plants, an essential decrease of Cd, Pb and U reserves in forms determining their mobility and availability in sandy soils could be caused by 3-5 w. % of biochar, but in sandy-loam soils it can be obtained with 3 w. % of biochar.Методом химического фракционирования изучено изменение запаса Сё, Pb и U в обменной (обратимо сорбированной) и подвижной (условно биологически доступной) формах в песчаной и супесчаной разновидностях почв дерново-подзолистого типа после добавления 1-5 мас.% биоугля. Установлено, что к заметному снижению запаса Сё, Pb и U в формах, определяющих их подвижность и биологическую доступность растениям, при сохранении благоприятных условий для выращивания сельскохозяйственных культур может приводить внесение в супесчаные почвы биоугля в дозе 3 мас.%, а в песчаные - 3-5 мас.%

The Baby MIND spectrometer for the J-PARC T59(WAGASCI) experiment

The Baby MIND spectrometer is designed to measure the momentum and charge of muons from neutrino interactions in water and hydrocarbon targets at the J-PARC T59 (WAGASCI) experiment. The WAGASCI experiment will measure the ratio of neutrino charged current interaction cross-sections on water and hydrocarbon aiming at reducing systematic errors in neutrino oscillation analyses at T2K. Construction of the Baby MIND detector within the CERN Neutrino Platform framework was completed in June 2017, where it underwent full commissioning and characterization on a charged particle beam line at the Proton Synchrotron experimental hall