研究者業績
基本情報
- 所属
- 千葉大学 大学院理学研究院 特任助教
- 学位
- Ph.D.(2020年1月 University of Geneva)修士(2016年3月 東京工業大学大学院)学士(2014年3月 東京工業大学)
- ORCID ID
https://orcid.org/0000-0003-4253-4484- J-GLOBAL ID
- 202101018485375627
- researchmap会員ID
- R000029194
経歴
3-
2021年10月 - 現在
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2020年2月 - 2021年9月
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2016年6月 - 2020年1月
学歴
3-
2016年6月 - 2020年1月
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2014年4月 - 2016年3月
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2010年4月 - 2014年3月
論文
18-
Physical Review D 2024年7月12日 査読有り<jats:p>The Forward Search Experiment (FASER) at CERN’s Large Hadron Collider (LHC) has recently directly detected the first collider neutrinos. Neutrinos play an important role in all FASER analyses, either as signal or background, and it is therefore essential to understand the neutrino event rates. In this study, we update previous simulations and present prescriptions for theoretical predictions of neutrino fluxes and cross sections, together with their associated uncertainties. With these results, we discuss the potential for possible measurements that could be carried out in the coming years with the FASER neutrino data to be collected in LHC Run 3 and Run 4.</jats:p> <jats:sec> <jats:title/> <jats:supplementary-material> <jats:permissions> <jats:copyright-statement>Published by the American Physical Society</jats:copyright-statement> <jats:copyright-year>2024</jats:copyright-year> </jats:permissions> </jats:supplementary-material> </jats:sec>
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Physical Review Letters 133(2) 2024年7月11日 査読有りThe first results of the study of high-energy electron neutrino (νe) and muon neutrino (νμ) charged-current interactions in the FASERν emulsion-tungsten detector of the FASER experiment at the LHC are presented. A 128.8 kg subset of the FASERν volume was analyzed after exposure to 9.5 fb−1 of s=13.6 TeV pp data. Four (eight) νe (νμ) interaction candidate events are observed with a statistical significance of 5.2σ (5.7σ). This is the first direct observation of νe interactions at a particle collider and includes the highest-energy νe and νμ ever detected from an artificial source. The interaction cross section per nucleon σ/Eν is measured over an energy range of 560–1740 GeV (520–1760 GeV) for νe (νμ) to be (1.2−0.7+0.8)×10−38 cm2 GeV−1 [(0.5±0.2)×10−38 cm2 GeV−1], consistent with standard model predictions. These are the first measurements of neutrino interaction cross sections in those energy ranges. Published by the American Physical Society 2024
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Journal of Instrumentation 19(05) P05066-P05066 2024年5月1日 査読有りAbstract FASER, the ForwArd Search ExpeRiment, is an experiment dedicated to searching for light, extremely weakly-interacting particles at CERN's Large Hadron Collider (LHC). Such particles may be produced in the very forward direction of the LHC's high-energy collisions and then decay to visible particles inside the FASER detector, which is placed 480 m downstream of the ATLAS interaction point, aligned with the beam collisions axis. FASER also includes a sub-detector, FASERν, designed to detect neutrinos produced in the LHC collisions and to study their properties. In this paper, each component of the FASER detector is described in detail, as well as the installation of the experiment system and its commissioning using cosmic-rays collected in September 2021 and during the LHC pilot beam test carried out in October 2021. FASER has successfully started taking LHC collision data in 2022, and will run throughout LHC Run 3.
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Physics Letters B 138378-138378 2023年12月 査読有り
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Journal of Instrumentation 18(10) P10008-P10008 2023年10月1日 査読有りAbstract Tau neutrino is the least studied lepton of the Standard Model (SM). The NA65/DsTau experiment targets to investigate Ds, the parent particle of the ντ, using the nuclear emulsion-based detector and to decrease the systematic uncertainty of ντ flux prediction from over 50 % to 10 % for future beam dump experiments. In the experiment, the emulsion detectors are exposed to the CERN SPS 400 GeV proton beam. To provide optimal conditions for the reconstruction of interactions, the protons are required to be uniformly distributed over the detector's surface with an average density of 105 cm-2 and the fluctuation of less than 10%. To address this issue, we developed a new proton irradiation system called the target mover. The new target mover provided irradiation with a proton density of 1.01 × 105 cm-2 and the density fluctuation of 1.9 ± 0.3% in the DsTau 2021 run.
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Physical Review Letters 131(3) 2023年7月19日 査読有り
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Acta Astronautica 2023年5月 査読有り
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Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 958 162433-162433 2020年 査読有り筆頭著者責任著者
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Journal of Instrumentation 14(11) P11008-P11008 2019年11月6日 査読有り
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Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 924 339-342 2019年4月 査読有り筆頭著者責任著者
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Journal of Instrumentation 14(02) 2019年 査読有りThe TT-PET collaboration is developing a small animal TOF-PET scanner based on monolithic silicon pixel sensors in SiGe BiCMOS technology. The demonstrator chip, a small-scale version of the final detector ASIC, consists of a 3 x 10 pixel matrix integrated with the front-end, a 50 ps binning TDC and read out logic. The chip, thinned down to 100 {\mu}m and backside metallized, was operated at a voltage of 180 V. The tests on a beam line of minimum ionizing particles show a detection efficiency greater than 99.9 % and a time resolution down to 110 ps.
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Journal of Instrumentation 14(07) 2019年 査読有りTime-of-flight measurement is an important advancement in PET scanners to improve image reconstruction with a lower delivered radiation dose. This article describes the monolithic ASIC for the TT-PET project, a novel idea for a high-precision PET scanner for small animals. The chip uses a SiGe Bi-CMOS process for timing measurements, integrating a fully-depleted pixel matrix with a low-power BJT-based front-end per channel, integrated on the same 100 $\mu{} m$ thick die. The target timing resolution is 30 ps RMS for electrons from the conversion of 511 keV photons. A novel synchronization scheme using a patent-pending TDC is used to allow the synchronization of 1.6 million channels across almost 2000 different chips at picosecond-level. A full-featured demonstrator chip with a 3x10 matrix of 500x500 $\mu{} m^{2}$ pixels was produced to validate each block. Its design and experimental results are presented here.
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2018年11月29日The TT-PET collaboration is developing an MRI-compatible small animal PET scanner in which the sensitive element is a monolithic silicon pixel ASIC targeting 30 ps RMS time resolution. The photon-detection technique is based on a stack of alternating layers of high-Z photon converter and 100 $\mathrm{\mu m}$ silicon sensors, to produce a scanner with 0.5 $\mathrm{\times}$ 0.5 $\mathrm{\times}$ 0.2 $\mathrm{mm^{3 } }$ granularity for precise depth-of-interaction measurement. In this paper we present the results of simulation studies for the expected data rate, time-of-flight and spatial resolution, as well as the performance of image reconstruction with and without the use of timing information.
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arXiv preprint arXiv:1811.12381 2018年11月29日The TT-PET collaboration is developing a small animal TOF-PET scanner based on silicon detectors featuring 30 ps RMS time resolution and intended to be inserted in an existing MRI scanner. The TT-PET scanner makes use of a stack of layers of high-Z photon-converter and 100 $\mathrm{\mu m}$ thick silicon sensors, to achieve a scanner with 0.5 $\mathrm{\times}$ 0.5 $\mathrm{\times}$ 0.2 $\mathrm{mm^{3 } }$ granularity, with precise depth-of-interaction measurement. In this paper we present the results of the Monte Carlo studies for the expected data rate, time resolution on the TOF measurements, spatial resolution and image reconstruction with and without the use of the timing information. Most of the studies have been performed according to the international standards used to assess the performance of small-animal PET system.
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Journal of Instrumentation 13(04) 2018年 査読有り
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Journal of Instrumentation 13(01) 2018年 査読有り