Experimental Studies of Shielding and Irradiation Effects at High-Energy Accelerator Facilities

Nakashima, Hiroshi; Sakamoto, Yukio; Iwamoto, Yosuke; Matsuda, Norihiro; Kasugai, Yoshimi; Nakane, Yoshibumi; Masukawa, Fumihiro; Mokhov, N.; Leveling, A.; Boehnlein, D.; Vaziri, K.; Sanami, Toshiya; Matsumura, Hiroshi; Hagiwara, Masayuki; Iwase, Hiroshi; Kinoshita, Norikazu; Hirayama, Hideo; Oishi, Koji; Nakamura, Takashi; Arakawa, Hiroyuki; Shigyo, Nobuhiro; Ishibashi, Kenji; Yashima, Hiroshi; Nakao, Noriaki; Niita, Koji

doi:10.13182/nt09-a9229

Cited by 14 publications

(7 citation statements)

References 9 publications

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“…Benchmark experiment for PHITS calculation code has been performed under the Japanese and American Study of Muon Interaction and Neutron detection (JASMIN) collaboration with the high energy particle beams at the Fermi National Accelerator Laboratory (FNAL) [5].…”

Section: Introductionmentioning

confidence: 99%

Measurement and analysis of neutron and photon dose rate in concrete shield of 120-GeV proton accelerator facility

Oishi¹,

Kosako²,

Kasugai³

2014

Progress in Nuclear Science and Technology

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The dose rate measurements of neutrons and photons by using dosimeter (Quixel badge) have been performed in the concrete shield at the 120 GeV anti-proton production facility (AP0) in Fermi National Accelerator Laboratory. The concrete shield was established backward of 183 cm thick iron shield. The thickness of the concrete shield was 122 cm. The dosimeters were set in the concrete shield at 0, 15, 30, 45, 60, 90 and 120 cm from the front surface. The proton beam intensities varied from 2.40x10 12 to 5.18x10 17 (protons/sec) according to the sensitiveness of the dosimeters. The calculations of dose rate in the concrete shield have also been performed by using PHITS-2.24 calculation code with its related cross section library JENDL3.3. From the comparisons between measured and calculated results, good agreements within factor 2 were obtained in the case of photons. However, some disagreements were observed in the case of neutrons, especially near the front surface up to 15 cm. These discrepancies might be caused by the estimation of neutron dose rate and/or detector resolution around 100 keV.

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Section: Introductionmentioning

confidence: 99%

Measurement and analysis of neutron and photon dose rate in concrete shield of 120-GeV proton accelerator facility

Oishi¹,

Kosako²,

Kasugai³

2014

Progress in Nuclear Science and Technology

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“…We organized the Japanese and American Study of Muon Interaction and Neutron detection (JASMIN) with the objective of acquiring this experimental data. JASMIN began investigating the transport of high-energy neutrons within shields at an antiproton production (Pbar) target station of the Fermi National Accelerator Laboratory (FNAL), USA [2]. In the Pbar target station, the secondary particles produced by bombarding a thick target with 120-GeV protons are shielded by a thick iron and a thick concrete shield, as shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Shielding Experiments under JASMIN Collaboration at Fermilab (III): Measurement of High Energy Neutrons Penetrating a Thick Iron Shield from the Antiproton Production Target by Au Activation Method

Matsumura¹,

Kinoshita²,

Iwase³

et al. 2011

J. Korean Phy. Soc.

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In an antiproton production (Pbar) target station of the Fermi National Accelerator Laboratory (FNAL), the secondary particles produced by bombarding a target with 120-GeV protons are shielded by a thick iron shield. In order to obtain experimental data on high-energy neutron transport at more than 100-GeV-proton accelerator facilities, we indirectly measured more than 100-MeV neutrons at the outside of the iron shield at an angle of 50° in the Pbar target station. The measurement was performed by using the Au activation method coupled with a low-background γ-ray counting system. As an indicator for the neutron flux, we determined the production rates of 8 spallation nuclides ( 196 Au, 188 Pt, 189 Ir, 185 Os, 175 Hf, 173 Lu, 171 Lu, and 169 Yb) in the Au activation detector. The measured production rates were compared with the theoretical production rates calculated using PHITS. We proved that the Au activation method can serve as a powerful tool for indirect measurements of more than100-MeV neutrons that play a vital role in neutron transport. These results will be important for clarifying the problems in theoretical calculations of high-energy neutron transport. *

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“…The Japanese and American Study of Muon Interaction and Neutron Detection (JASMIN) collaboration [1] has been organized to study radiation safety issues on ultra high-energy accelerators. The experiments have been carried out at Fermi National Accelerator Laboratory (Fermilab).…”

Section: Introductionmentioning

confidence: 99%

Shielding Experiments under JASMIN Collaboration at Fermilab (IV) Measurement and Analyses of High-Energy Neutron Spectra in the Anti-Proton Target Station

Matsuda¹,

Kasugai²,

Sakamoto³

et al. 2011

J. Korean Phy. Soc.

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Neutron spectra in high-energy region between 1 and 100 MeV in the shield configuration of the anti-proton target station and a 120-GeV proton beam at Fermi National Accelerator Laboratory (Fermilab) were determined using the reaction rate data obtained with the multi-foil activation method. Two kinds of methods were employed for the determination of neutron spectra: one is the fitting method which is newly developed in this work, another is the unfolding method with SAND-II code. The calculations were performed using the PHITS. From the comparison between the calculated and experimental neutron spectra, it concluded that the PHITS can be used for shielding design of highenergy proton accelerators. *

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Experimental Studies of Shielding and Irradiation Effects at High-Energy Accelerator Facilities

Cited by 14 publications

References 9 publications

Measurement and analysis of neutron and photon dose rate in concrete shield of 120-GeV proton accelerator facility

Measurement and analysis of neutron and photon dose rate in concrete shield of 120-GeV proton accelerator facility

Shielding Experiments under JASMIN Collaboration at Fermilab (III): Measurement of High Energy Neutrons Penetrating a Thick Iron Shield from the Antiproton Production Target by Au Activation Method

Shielding Experiments under JASMIN Collaboration at Fermilab (IV) Measurement and Analyses of High-Energy Neutron Spectra in the Anti-Proton Target Station

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