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Sasao, Hajime; Arakawa, Hiroyuki*; Kubo, Hirotaka; Kawano, Yasunori; Itami, Kiyoshi
Review of Scientific Instruments, 85(8), p.086106_1 - 086106_3, 2014/08
Times Cited Count：2 Percentile：11.24(Instruments & Instrumentation)Arakawa, Hiroyuki; Kawano, Yasunori; Itami, Kiyoshi
Review of Scientific Instruments, 83(10), p.10E345_1 - 10E345_3, 2012/10
Times Cited Count：1 Percentile：7.11(Instruments & Instrumentation)Arakawa, Hiroyuki; Kawano, Yasunori; Itami, Kiyoshi
Review of Scientific Instruments, 83(6), p.063507_1 - 063507_7, 2012/06
Times Cited Count：3 Percentile：17.19(Instruments & Instrumentation)A new method for determining the plasma electron density using the fractional fringes on three-color interferometer is proposed. Integrated phase shift on each interferometer is derived without using the temporal history of the fractional fringes. The dependence on the fringe resolution and the electrical noise are simulated on the wavelengths of CO
laser. Short-time integrations of the fractional fringes enhance the reliability of this method.
Hagiwara, Masayuki*; Sanami, Toshiya*; Iwamoto, Yosuke; Arakawa, Hiroyuki*; Shigyo, Nobuhiro*; Mokhov, N.*; Leveling, A.*; Boehnlein, D.*; Vaziri, K.*; Nakamura, Takashi*; et al.
Progress in Nuclear Science and Technology (Internet), 1, p.52 - 56, 2011/02
In pbar target station, the pulsed proton beam with the power of around 75 kW and the time structure of 1.6 
s pulse width and 2.2 s cycle time bombards the pbar production target and produces high instantaneous intensity neutron (burst neutron) fields. The duration of the burst neutrons, which is less than s, is very severe condition to measure neutron spectra with a conventional Bonner sphere technique with pulse readout electronics because of signal pile-up problem. In this study, we have developed a current readout Bonner sphere technique to measure neutron spectra in a burst neutron field. We have measured the neutron spectra on the pbar target and graphite dump. The neutron spectra obtained with the present technique show generally good agreements with the calculation results using MARS code except difference of the thermal neutron flux due to the geometrical problem.
Nakashima, Hiroshi; Sakamoto, Yukio; Iwamoto, Yosuke; Matsuda, Norihiro; Kasugai, Yoshimi; Nakane, Yoshihiro; Masukawa, Fumihiro; Mokhov, N.*; Leveling, A.*; Boehnlein, D.*; et al.
Nuclear Technology, 168(2), p.482 - 486, 2009/11
Times Cited Count：7 Percentile：45.28(Nuclear Science & Technology)Experimental studies of shielding and radiation effects have been started using 120-GeV proton synchrotron at Fermi National Accelerator Laboratory (FNAL) under collaboration between FNAL and Japan. The first campaign of the experiment was carried out at the Pbar target station and Numi experimental station at FNAL, using antiproton and neutrino production targets irradiated by 120-GeV protons. The generated secondary particles passing through steel, concrete and rock were measured by activation methods as well as by other detectors such as scintillator with a veto counter, phoswich detector and a Bonner ball counter on trial. Preliminary experimental results are presented.
Watanabe, Takehito*; Arakawa, Hiroyuki*; Kajimoto, Tsuyoshi*; Iwamoto, Yosuke; Satoh, Daiki; Kunieda, Satoshi; Noda, Shusaku*; Shigyo, Nobuhiro*; Ishibashi, Kenji*; Nakamura, Takashi*; et al.
Nuclear Instruments and Methods in Physics Research A, 587(1), p.20 - 28, 2008/03
Times Cited Count：1 Percentile：13.75(Instruments & Instrumentation)We have developed a phoswich detector for neutron spectrometry, which adopts a reversed configuration of slow- and fast-decay-time scintillators in its inner and surrounding outer regions, respectively, in the detection of recoil protons from a hydrogenous radiator. The phoswich detector consists of an inner slow, NaI(Tl) scintillator, and an outer fast, plastic scintillator. The response functions of the phoswich detector were measured for neutron energies ranging from 100 to 350 MeV. The experiment used the recoil-proton method and pulse-shape discrimination with the two-gate integration technique using a spallation neutron source at the WNR facility of the LANSCE. To evaluate the effectiveness of the phoswich configuration, full energy deposition fraction was calculated. The calculation confirmed that the phoswich detector with a reversed configuration is useful for neutron measurements.
Arakawa, Kazuo; Oikawa, Masakazu*; Shimada, Hirofumi*; Kamiya, Tomihiro; Nakano, Takashi*; Yusa, Ken*; Kato, Hiroyuki*; Sato, Takahiro; Agematsu, Takashi; Kashiwagi, Hirotsugu; et al.
Proceedings of 4th Annual Meeting of Particle Accelerator Society of Japan and 32nd Linear Accelerator Meeting in Japan (CD-ROM), p.279 - 281, 2007/00
no abstracts in English
Fukuda, Mitsuhiro; Arakawa, Kazuo; Sato, Takahiro; Okumura, Susumu; Saito, Yuichi; Kashiwagi, Hirotsugu; Miyawaki, Nobumasa; Yuri, Yosuke; Ishii, Yasuyuki; Kobayashi, Yasuhiko; et al.
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Arakawa, Kazuo; Fukuda, Mitsuhiro*; Shimada, Hirofumi*; Sakai, Takuro; Sato, Takahiro; Oikawa, Masakazu*; Agematsu, Takashi; Kashiwagi, Hirotsugu; Okumura, Susumu; Kurashima, Satoshi; et al.
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Shimada, Hirofumi*; Oikawa, Masakazu*; Sato, Takahiro; Taguchi, Mitsumasa; Okumura, Susumu; Kato, Hiroyuki*; Yusa, Ken*; Sakai, Takuro; Fukuda, Mitsuhiro*; Sato, Taku*; et al.
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Matsumura, Hiroshi*; Kasugai, Yoshimi; Yashima, Hiroshi*; Iwase, Hiroshi*; Matsuda, Norihiro; Kinoshita, Norikazu*; Sanami, Toshiya*; Hagiwara, Masayuki*; Shigyo, Nobuhiro*; Arakawa, Hiroyuki*; et al.
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A gold activation detector was studied as a high energy neutron detector at high radiation field in a series of shielding experiment at Fermi National Accelerator Laboratory. We could measure spallation residual nuclei with wide threshold energy by using a combination method with radiological chemical separation and X-X-
coincidence detection methods. It was shown the detector was effective for high energy neutron detector.
Suzuki, Yoshiyuki*; Yoshida, Yukari*; Shimada, Hirofumi*; Kato, Hiroyuki*; Sakurai, Hideyuki*; Kawachi, Naoki; Takeda, Shinichiro*; Ishikawa, Shinnosuke*; Aono, Hiroyuki*; Watanabe, Shin*; et al.
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Nakashima, Hiroshi; Mokhov, N.*; Iwamoto, Yosuke; Matsuda, Norihiro; Kasugai, Yoshimi; Sakamoto, Yukio; Leveling, A.*; Boehnlein, D.*; Vaziri, K.*; Sanami, Toshiya*; et al.
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Several multi-purpose high-energy radiation transport codes are used in many research fields such as high-energy physics as well as accelerator facility shielding designs. The codes are benchmarked against experimental data on a regular basis. To promote this to a higher level and to a hardly explored field of neutron radiation induced by energetic muons, a JASMIN collaboration (Japanese-American Study of Muon Interaction and Neutron detection), has been created with several Laboratories and Universities of Japan and U.S.A. The collaboration has performed a series of experiments at the Pbar target station and NuMI facility at Fermi National Accelerator Laboratory, using irradiation of targets with 120 GeV protons for antiproton and neutrino production. This paper reviews recent activities and results.
Itami, Kiyoshi; Shinohara, Koji; Hatae, Takaki; Kamiya, Kensaku; Fukumoto, Masakatsu; Nakano, Tomohide; Yoshida, Maiko; Tojo, Hiroshi; Arakawa, Hiroyuki; Kokusen, Shigeharu; et al.
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Arakawa, Hiroyuki; Kawano, Yasunori; Itami, Kiyoshi
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Arakawa, Hiroyuki; Kawano, Yasunori; Tojo, Hiroshi; Sasao, Hajime; Itami, Kiyoshi
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Arakawa, Hiroyuki; Sasao, Hajime; Kawano, Yasunori; Itami, Kiyoshi
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Arakawa, Hiroyuki; Sasao, Hajime; Tojo, Hiroshi; Kawano, Yasunori; Itami, Kiyoshi
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Arakawa, Hiroyuki; Sasao, Hajime; Kawano, Yasunori; Itami, Kiyoshi
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