A first measurement of the interaction cross section of the tau neutrino

The DONuT experiment collected data in 1997 and published first results in 2000 based on four observed $\nu_\tau$ charged-current (CC) interactions. The final analysis of the data collected in the experiment is presented in this paper, based on $3.6 \times 10^{17}$ protons on target using the 800 GeV Tevatron beam at Fermilab. The number of observed $\nu_\tau$ CC interactions is 9, from a total of 578 observed neutrino interactions. We calculated the energy-independent part of the tau-neutrino CC cross section ($\nu + \bar \nu$), relative to the well-known $\nu_e$ and $\nu_\mu$ cross sections. The ratio $\sigma(\nu_\tau)$/$\sigma(\nu_{e,\mu})$ was found to be $1.37\pm0.35\pm0.77$. The $\nu_\tau$ CC cross section was found to be $0.72 \pm 0.24\pm0.36 \times 10^{-38}$ cm$^{2}\rm{GeV}^{-1}$. Both results are in agreement the Standard Model.Comment: 37 pages, 15 figure

玉砂利を使用したオープンケーソンに作用する周面摩擦に関する研究(IV)

The SS caisson (SPACE SYSTEM CAISSON) method fills the space (gap) between caisson circumference surface and country rock with the space gravel, and it is the open caisson method which gently installs the caisson only by the dead weight at the good accuracy by reducing skin friction resistance which depends on caisson circumference surface, while the stability of country rock is attempted. The following have been carried out : Until now field measurement and indoor model experiment of conventional normal caisson model and the SS caisson model without exhaust slot. As the result, it was proven that the skin friction decreased from open caisson very much This time, it experimented based on this result in order to consider the effect as in addition, there is an exhaust slot.textapplication/pdfdepartmental bulletin pape

Detection of Partial Discharge using Acoustic Emission and Electromagnetic Wave Sensors

To diagnose electric power apparatus under operation, to detect partial discharge (PD) which refers predictive phenomenon on insulation deterioration of electric power apparatus is useful. An acoustic emission (AE) and an electromagnetic wave sensor techniques are widely accepted for the detection of PDs. However, the relationship between the intensity of signal and electrical charge due to PDs is not well investigated. We here focused on diagnosing vacuum circuit breakers (VCBs), and examined to detect PDs in a cubicle. The PDs were detected by AE and electromagnetic wave sensors, and their sensitivities were evaluated. Based on the results, we discussed an optimal detection method for detecting PDs in a cubicle.departmental bulletin pape

宇宙用高精度大型構造物の研究開発: スマート形状可変鏡

application/pdf日本航空宇宙学会誌. 2018, 66 (5), P.50-55journal articl

Study of Time-Dependent CP Violation in B0→J/ψπ0 Decays

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三重大学附属図書館のブランド化戦略 : 広報誌のリニューアルを中心に(<特集>わが図書館をブランドにするために!)

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