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CERN Document Server Sök i 29 journaler efter:  1 - 10nästaslut  gå till journal: Sökningen tog 0.56 sekunder. 
1.
Production rates of long-lived radionuclides Be10 and Al26 under direct muon-induced spallation in granite quartz and its implications for past high-energy cosmic ray fluxes / Sakurai, H (Yamagata U.) ; Kurebayashi, Y (Yamagata U.) ; Suzuki, S (Yamagata U.) ; Horiuchi, K (Hirosaki U.) ; Takahashi, Y (Yamagata U.) ; Doshita, N (Yamagata U.) ; Kikuchi, S (Yamagata U.) ; Tokanai, F (Yamagata U.) ; Iwata, N (Yamagata U.) ; Tajima, Y (Yamagata U.) et al.
This study measured the Be10 and Al26 production cross sections of muon-induced long-lived radionuclides to investigate the long-term variations in high-energy cosmic ray muon yields and high-energy galactic cosmic rays over a few million years. We exposed targets consisting of synthetic silica plates and quartz samples in a 1-m-long granite core to a beam containing 8.79×1012 positive muons over ∼120  days with an energy of 160 GeV extracted at the COMPASS experiment line at CERN-SPS. [...]
2024 - 18 p. - Published in : Phys. Rev. D 109 (2024) 102005
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2.
First joint oscillation analysis of Super-Kamiokande atmospheric and T2K accelerator neutrino data / T2K Collaboration
The Super-Kamiokande and T2K collaborations present a joint measurement of neutrino oscillation parameters from their atmospheric and beam neutrino data. It uses a common interaction model for events overlapping in neutrino energy and correlated detector systematic uncertainties between the two datasets, which are found to be compatible. [...]
arXiv:2405.12488.- 2025-01-02 - 12 p. - Published in : Phys. Rev. Lett. 134 (2025) 011801 Fulltext: 2405.12488 - PDF; Publication - PDF;
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3.
T2K measurements of muon neutrino and antineutrino disappearance using $3.13\times 10^{21}$ protons on target / T2K Collaboration
We report measurements by the T2K experiment of the parameters $\theta_{23}$ and $\Delta m^2_{32}$ which govern the disappearance of muon neutrinos and antineutrinos in the three-flavor PMNS neutrino oscillation model at T2K's neutrino energy and propagation distance. Utilizing the ability of the experiment to run with either a mainly neutrino or a mainly antineutrino beam, muon-like events from each beam mode are used to measure these parameters separately for neutrino and antineutrino oscillations. [...]
arXiv:2008.07921.- 2021-01-27 - 9 p. - Published in : Phys. Rev. D 103 (2021) L011101 Article from SCOAP3: PDF; Fulltext: PDF;
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4.
Integrated modeling of the beam formation and extraction in the Linac4 hydrogen negative ion source / Nishioka, S (Keio U.) ; Abe, S (Keio U.) ; Mattei, S (CERN) ; Lallement, J B (CERN) ; Kalvas, T (Jyvaskyla U.) ; Hatayama, A (Keio U.) ; Lettry, J (CERN)
In order to make the predictive simulation tools for the extracted beam current and emittance in the Linac4 H− ion source, we have launched the development of the integrated model for the H− ion beam formation and extraction process. More specifically, our 3D KEIO-Beam Formation and eXtraction (3D KEIO-BFX) is coupled with the NINJA, IBSIMU and TRAVEL. [...]
2018 - 3 p. - Published in : AIP Conf. Proc. 2011 (2018) 080017
In : International Conference on Ion Sources, CERN Geneva, Geneva, Switzerland, 15 - 20 Oct 2017, pp.080017
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5.
Analysis of H− extraction in the Linac4 negative ion source by 2.5D particle simulation / Abe, S (Keio U.) ; Nishioka, S (Keio U.) ; Mattei, S (CERN) ; Miyamoto, K (Naruto U. of Education) ; Hatayama, A (Keio U.) ; Lettry, J (CERN)
The purpose of this study is to investigate the extraction mechanisms of the H− ions in the Linac4 negative ion source by using an improved two-dimensional in real space and three-dimensional in velocity space Particle in Cell (2D3V-PIC) model. In this model, the following collision processes of the surface produced H− (Hsp−) ions have been introduced and the effects of the collisions on H− extraction have been analyzed: elastic (Hsp− - H2) and charge exchange (Hsp− - H). [...]
2018 - 3 p. - Published in : AIP Conf. Proc. 2011 (2018) 080020
In : International Conference on Ion Sources, CERN Geneva, Geneva, Switzerland, 15 - 20 Oct 2017, pp.080020
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6.
Effects of the extraction voltage applied by the puller-electrode on the H$^−$ extraction in the Linac4 negative ion source / Abe, S (Keio U.) ; Nishioka, S (Keio U.) ; Mattei, S (CERN) ; Hatayama, A (Keio U.) ; Lettry, J (CERN)
In order to understand the H$^−$ extraction mechanism and investigate the effect of the extraction voltage applied by the puller-electrode on the H$^−$ extraction in the Linac4 negative ion source, we are developing a 2D3V-PIC (two dimensions in the real space and three dimensions in the velocity space, Particle in Cell) model with volume produced H$^−$ ions. It is shown that how to take the magnetic filter field direction is important for the 2D modeling to take into account the important 3D effect of electron $E \times B$ drift. [...]
2017 - 8 p. - Published in : AIP Conf. Proc. 1869 (2017) 030051
In : 5th International Symposium on Negative Ions, Beams and Sources, Oxford, United Kingdom, 12 - 16 Sep 2016, pp.030051
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7.
Effect of Coulomb collision on the negative ion extraction mechanism in negative ion sources / Goto, I (Keio U.) ; Miyamoto, K (Naruto U. of Education) ; Nishioka, S (Keio U.) ; Mattei, S (CERN) ; Lettry, J (CERN) ; Abe, S (Keio U.) ; Hatayama, A (Keio U.)
To improve the H− ion beam optics, it is necessary to understand the energy relaxation process of surface produced H− ions in the extraction region of Cs seeded H− ion sources. Coulomb collisions of charged particles have been introduced to the 2D3V-PIC (two dimension in real space and three dimension in velocity space particle-in-cell) model for the H− extraction by using the binary collision model. [...]
2016 - Published in : Rev. Sci. Instrum. 87 (2016) 02B918
In : 16th International Conference on Ion Sources, New York, NY, USA, 23 - 28 Aug 2015, pp.02B918
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8.
Development of a Magnetic Refrigerator for Hydrogen Liquefaction / Kamiya, Koji ; Numazawa, Takenori ; Matsumoto, Koichi ; Abe, Satoshi ; Nozawa, Hoshiteru ; Yanagitani, Takakimi
2006 - Published in : AIP Conf. Proc.: 850 (2006) , pp. 1583-1584 External link: Published version from AIP
In : 24th International Conference on Low Temperature Physics, Orlando, FL, USA, 10 - 17 Aug 2005, pp.1583-1584
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9.
Magnetocaloric Effect of RCo<sub>2</sub> (R : Er, Ho, Dy) Compounds for Regenerative Magnetic Refrigeration / Matsumoto, Koichi ; Kouen, Takaaki ; Nishida, Ryouhei ; Abe, Satoshi ; Kamiya, Koji ; Numazawa, Takenori
2006 - Published in : AIP Conf. Proc.: 850 (2006) , pp. 1581-1582 External link: Published version from AIP
In : 24th International Conference on Low Temperature Physics, Orlando, FL, USA, 10 - 17 Aug 2005, pp.1581-1582
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10.
Hyperfine Nuclear Magnetism of PrPb<sub>3</sub> in the Antiferro-Quadrupolar Ordered State / Abe, S ; Takahashi, D ; Yoshida, J ; Matsumoto, K ; Suzuki, H ; Kitai, T
2006 - Published in : AIP Conf. Proc.: 850 (2006) , pp. 1293-1294 External link: Published version from AIP
In : 24th International Conference on Low Temperature Physics, Orlando, FL, USA, 10 - 17 Aug 2005, pp.1293-1294
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CERN Document Server : Sök i 29 journaler efter:   1 - 10nästaslut  gå till journal:
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