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1.
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Measurement and simulations of high-energy neutrons through a various thickness of concrete and steel shields using activation detectors at CHARM and CSBF
/ Nakao, Noriaki (Tokyo Inst. Tech.) ; Sanami, Toshiya (KEK, Tsukuba) ; Kajimoto, Tsuyoshi (Hiroshima U.) ; Yashima, Hiroshi (Kyoto Sangyo U.) ; Froeschl, Robert (CERN) ; Bozzato, Davide (CERN) ; Iliopoulou, Elpida (CERN) ; Infantino, Angelo (CERN) ; Lee, Eunji (Kyushu U.) ; Oyama, Takahiro (KEK, Tsukuba) et al.
A shielding experiment using activation detectors was performed at the CERN High-energy AcceleRator Mixed-field (CHARM) facility and the CERN Shielding Benchmark Facility (CSBF). The protons (24 GeV/c) were bombarded into a 50-cm-thick copper target, and the released neutrons were transmitted through various shields located vertically upward from the target. [...]
2023 - 19 p.
- Published in : J. Nucl. Sci. Tech. 61 (2023) 429-447
Fulltext: PDF;
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2.
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Measurement of neutron spectra for various thicknesses of concrete and steel shielding at 24-GeV/c proton beam facility using Bonner sphere spectrometer
/ Matsumoto, Tetsuro (AIST, Tsukuba) ; Masuda, Akihiko (AIST, Tsukuba) ; Lee, Eunji (KEK, Tsukuba ; Kyushu U.) ; Sanami, Toshiya (KEK, Tsukuba) ; Oyama, Takahiro (KEK, Tsukuba) ; Kajimoto, Tsuyoshi (Hiroshima U.) ; Nakao, Noriaki (Shimizu, Tokyo) ; Yashima, Hiroshi (Kyoto U.) ; Nagaguro, Seiji (KEK, Tsukuba) ; Uwamino, Yoshitomo (Shimizu, Tokyo) et al.
Neutron energy spectra down to thermal energy were measured using a Bonner sphere spectrometer (BSS) for various thicknesses of concrete and steel shielding at the CERN/CHARM facility, where high-energy neutrons were produced by 24-GeV/c protons incident on a thick copper target. The thicknesses of the concrete and steel shielding blocks ranged from 40 cm to 200 cm and from 20 cm to 80 cm, respectively. [...]
2024 - 13 p.
- Published in : J. Nucl. Sci. Tech. 61 (2024) 98-110
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3.
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Benchmark Experiments for Bulk and Maze Shielding Using Activation Detectors with 24-GeV/c Protons at CERN/CHARM
/ Nakao, Noriaki (Tokyo U. Marine Sci. Tech.) ; Sanami, Toshiya (KEK, Tsukuba) ; Kajimoto, Tsuyoshi (Hiroshima U.) ; Froeschl, Robert (CERN) ; Bozzato, Davide (CERN ; KIT, Karlsruhe) ; Iliopoulou, Elpida (CERN) ; Infantino, Angelo (CERN) ; Yashima, Hiroshi (Kyoto Sangyo U.) ; Lee, Eunji (KEK, Tsukuba ; Kyushu U., Fukuoka (main)) ; Oyama, Takahiro (KEK, Tsukuba) et al.
Measurements of high-energy neutrons through shield penetration and maze streaming were performed at the Conseil Européen pour la Recherche Nucléaire (CERN) High-energy Accelerator Mixed-Field (CHARM) facility. The protons of 24 GeV/c were injected onto a 50-cm-thick copper target and the released neutrons were transmitted through shields and a maze in the facility. [...]
2024 - 12 p.
- Published in : Nucl. Sci. Eng. 198 (2024) 336-347
Fulltext: PDF;
In : 14th International Conference on Radiation Shielding & 21st Topical Meeting of the Radiation Protection and Shielding Division, Seattle, WA, USA, 25 - 29 Sep 2022, pp.336-347
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4.
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Measurements and Monte Carlo simulations of high-energy neutron streaming through the access maze using activation detectors at 24 GeV/c proton beam facility of CERN/CHARM
/ Nakao, Noriaki (Shimizu, Tokyo) ; Kajimoto, Tsuyoshi (Hiroshima U. (main)) ; Sanami, Toshiya (KEK, Tsukuba) ; Froeschl, Robert (CERN) ; Iliopoulou, Elpida (CERN) ; Infantino, Angelo (CERN) ; Yashima, Hiroshi (Kyoto U. (main)) ; Oyama, Takahiro (KEK, Tsukuba) ; Nagaguro, Seiji (KEK, Tsukuba) ; Lee, Eunji (Kyushu U., Fukuoka (main) ; NCSU, Raleigh) et al.
A measurement of high-energy neutron streaming was performed through a maze at the CERN (Conseil Européen pour la Recherche Nucléaire) High-energy AcceleRator Mixed-field (CHARM) facility. The protons of 24 GeV/c were injected onto a 50-cm-thick copper target and the released neutrons were streamed through a maze with several corridor-legs horizontally designed with the shield walls in the facility. [...]
2021 - 9 p.
- Published in : J. Nucl. Sci. Tech. 58 (2021) 899-907
Fulltext: PDF;
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5.
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IRDFF-II: A New Neutron Metrology Library
/ Trkov, A. (IAEA, Vienna) ; Griffin, P.J. (Sandia) ; Simakov, S.P. (KIT, Karlsruhe, IKP) ; Greenwood, L.R. (PNL, Richland) ; Zolotarev, K.I. (Obninsk, Inst. Phys. Power Eng.) ; Capote, R. (IAEA, Vienna) ; Aldama, D.L. (Havana, ISCTN) ; Chechev, V. (Khlopin Radium Inst.) ; Destouches, C. (CEA Cadarache) ; Kahler, A.C. (CERN) et al.
High quality nuclear data is the most fundamental underpinning for all neutron metrology applications. This paper describes the release of version II of the International Reactor Dosimetry and Fusion File (IRDFF-II) that contains a consistent set of nuclear data for fission and fusion neutron metrology applications up to 60~MeV neutron energy. [...]
arXiv:1909.03336.-
2020-01 - 108 p.
Fulltext: PDF;
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6.
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Measurements of secondary-particle emissions from copper target bombarded with 24-GeV/c protons
/ Oyama, Takahiro (KEK, Tsukuba) ; Sanami, Toshiya (KEK, Tsukuba) ; Yashima, Hiroshi (Kyoto U., KURRI) ; Hagiwara, Masayuki (KEK, Tsukuba) ; Nakao, Noriaki (Shimizu, Tokyo) ; Infantino, Angelo (CERN) ; Iliopoulou, Elpida (CERN) ; Froeschl, Robert (CERN) ; Roesler, Stefan (CERN) ; Kajimoto, Tsuyoshi (Hiroshima U.) et al.
To devise an activation technique for characterizing mixed radiation fields, secondary particles from a copper target irradiated by 24 GeV/c protons were measured at the CERN High-energy AcceleRator Mixed field facility (CHARM). Activation detector sets consisting of aluminum, niobium, indium, and bismuth, were placed at 30 cm from the target at angles of 15° to 160° with respect to the beam axis. [...]
2021 - 10 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 990 (2021) 164977
Fulltext: PDF;
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7.
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Neutron energy spectrum measurement using an NE213 scintillator at CHARM
/ Kajimoto, Tsuyoshi (Hiroshima U. (main)) ; Sanami, Toshiya (KEK, Tsukuba) ; Nakao, Noriaki (Shimizu, Tokyo) ; Froeschl, Robert (CERN) ; Roesler, Stefan (CERN) ; Iliopoulou, Elpida (CERN ; Aristotle U., Thessaloniki) ; Infantino, Angelo (CERN) ; Brugger, Markus (CERN) ; Lee, Eunji (Kyushu U., Fukuoka (main)) ; Shigyo, Nobuhiro (Kyushu U., Fukuoka (main)) et al.
To establish a methodology for neutron spectrum measurement at the CERN High energy AcceleRator Mixed field facility (CHARM), neutron spectra were measured using an NE213 scintillator on top of the CHARM roof shielding where is the CERN Shielding Benchmark Facility (CSBF). The spectra were derived as fluences into the scintillator by the unfolding method using an iterative Bayesian algorithm. [...]
2018 - 7 p.
- Published in : Nucl. Instrum. Methods Phys. Res., B 429 (2018) 27-33
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8.
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Measurement and calculation of thermal neutrons induced by the 24 GeV$/c$ proton bombardment of a thick copper target
/ Oyama, T (KEK, Tsukuba) ; Hagiwara, M (KEK, Tsukuba) ; Sanami, T (KEK, Tsukuba) ; Yashima, H (Kyoto U. (main)) ; Nakao, N (Shimizu, Tokyo) ; Lee, E J (Kyushu U.) ; Iliopoulou, E (CERN ; Aristotle U., Thessaloniki) ; Froeschl, R (CERN) ; Infantino, A (CERN) ; Roesler, S (CERN)
The CERN High-Energy AcceleRator Mixed field (CHARM) facility provides a secondary particle field, produced by irradiating a thick target with 24 GeV$/c$ protons supplied by the proton synchrotron. In order to investigate the thermalization process of secondary neutrons in the CHARM facility, we measured the thermal neutrons using the gold foil activation method. [...]
2018 - 8 p.
- Published in : Nucl. Instrum. Methods Phys. Res., B 434 (2018) 29-36
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9.
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Measurements and FLUKA Simulations of Bismuth, Aluminium and Indium Activation at the upgraded CERN Shielding Benchmark Facility (CSBF)
/ Iliopoulou, E (CERN) ; Bamidis, P ; Brugger, M (CERN) ; Froeschl, R ; Infantino, A ; Kajimoto, T ; Nakao, N ; Roesler, S ; Sanami, T ; Siountas, A et al.
The CERN High energy AcceleRator Mixed field (CHARM) facility is situated in the CERN Proton Synchrotron (PS) East Experimental Area. The facility receives a pulsed proton beam from the CERN PS with a beam momentum of 24 GeV/c with $5 \cdot 10^{11}$ protons per pulse with a pulse length of 350 ms and with a maximum average beam intensity of $6.7 \cdot 10^{10}$ protons per second. [...]
2018 - 14 p.
- Published in : J. Phys.: Conf. Ser. 1046 (2018) 012004
Fulltext: 10.1088_1742-6596_1046_1_012004 - PDF; pdf - PDF;
In : 4th International Workshop on Accelerator Radiation Induced Activation, Lund, Sweden, 22 - 24 May 2017, pp.012004
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10.
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Characterization of the PTW 34031 ionization chamber (PMI) at RCNP with high energy neutrons ranging from 100 – 392 MeV
/ Theis, C (CERN) ; Carbonez, P (CERN) ; Feldbaumer, E (CERN) ; Forkel-Wirth, D (CERN) ; Jaegerhofer, L (CERN) ; Pangallo, M (CERN) ; Perrin, D (CERN) ; Urscheler, C (CERN) ; Roesler, S (CERN) ; H Vincke (CERN) et al.
Radiation monitoring at high energy proton accelerators poses a considerable challenge due to the complexity of the encountered stray radiation fields. These environments comprise a wide variety of different particle types and span from fractions of electron-volts up to several terra electron-volts. [...]
2017 - 5 p.
- Published in : EPJ Web Conf. 153 (2017) 08018
Fulltext: PDF;
In : 13th International Conference on Radiation Shielding & 19th Topical Meeting of the Radiation Protection & Shielding Division of the American Nuclear Society 2016, Paris, France, 3 - 6 Oct 2016, pp.08018
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