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Haruyama, Yasuyuki; Takizawa, Haruki; Hosono, Masakazu; Mizuhashi, Kiyoshi*; Nakamura, Yoshiteru*; Kaneya, Satoshi*; Asai, Takahiro*; Kawabata, Michiko*; Imai, Koji*
JAEA-Review 2013-059, JAEA Takasaki Annual Report 2012, P. 177, 2014/03
Cyclotron use in FY 2012, was 2243.5 hours beam time. Among them, the use time of Bio technology and Medical application relationship most, I occupy the time spent for the Quarter of the total. Use offer to the outside utilization was 17%. Use the number of days in Electrostatic Accelerators was 490 days. Among them, Basic technology is accounted for using the percentage of 46%, but the use of irradiation Reactor materials and irradiation of Material for space even more, I accounted for 18 percent utilization rate, respectively, of 15%. Use offer to the outside utilization was 8%.
Ishizaka, Tomohisa; Imai, Koji*; Yuri, Yosuke; Yuyama, Takahiro; Ishibori, Ikuo; Okumura, Susumu
Proceedings of 9th Annual Meeting of Particle Accelerator Society of Japan (Internet), p.594 - 596, 2013/08
no abstracts in English
Ishizaka, Tomohisa; Imai, Koji*; Yuri, Yosuke; Yuyama, Takahiro; Ishibori, Ikuo; Okumura, Susumu
JAEA-Review 2012-046, JAEA Takasaki Annual Report 2011, P. 157, 2013/01
nucleus 
CrOnishi, Takeo*; Gelberg, A.*; Sakurai, Hiroyoshi*; Yoneda, Kenichiro*; Aoi, Nori*; Imai, Nobuaki*; Baba, Hidetada*; Von Brentano, P.*; Fukuda, Naoki*; Ichikawa, Yuichi*; et al.
Physical Review C, 72(2), p.024308_1 - 024308_7, 2005/08
Times Cited Count：21 Percentile：76.44(Physics, Nuclear)no abstracts in English
,n) reactions on light neutron-rich nuclei using low-energy radioactive nuclear beamsHashimoto, Takashi; Mitsuoka, Shinichi; Ichikawa, Shinichi; Ikezoe, Hiroshi; Miyatake, Hiroari; Ishiyama, Hironobu*; Watanabe, Yutaka*; Hirayama, Yoshikazu*; Imai, Nobuaki*; Tanaka, Masahiko*; et al.
no journal, ,
no abstracts in English
Kajimoto, Ryoichi; Yokoo, Tetsuya*; Nakajima, Kenji; Nakamura, Mitsutaka; Inamura, Yasuhiro; Soyama, Kazuhiko; Ino, Takashi*; Oyama, Kenji*; Sakai, Makiko; Aizawa, Kazuya; et al.
no journal, ,
4SEASONS is one of the day-one chopper spectrometers for the spallation neutron facility in Japan Proton Accelerator Research Complex (J-PARC). The spectrometer targets high-
superconductors and related strongly correlated materials utilizing incident energies of 5-300 meV. 4SEASONS supplies high flux at a sample by moderating the resolution (
-6% at 
) and incorporating efficient neutron optic devices. A new Fermi chopper is designed to multiply the measurement efficiency by repetition rate multiplication (RRM). Recently, we have decided to enlarge the detector coverage by 
in horizontal direction (with the maximum scattering angle being 
) to let the spectrometer have more flexibility. The designing of the vacuum scattering chamber has been almost completed. Examination of the 2.5m-
He PSD on neutron beam and manufacturing of a prototype of a slit package of the new chopper are going on.
Kajimoto, Ryoichi; Yokoo, Tetsuya*; Nakajima, Kenji; Nakamura, Mitsutaka; Inamura, Yasuhiro; Maruyama, Ryuji; Soyama, Kazuhiko; Suzuya, Kentaro; Ino, Takashi*; Oyama, Kenji*; et al.
no journal, ,
4SEASONS is a chopper-type inelastic neutron spectrometer, and one of the day-one instruments at the spallation neutron source facility in Japan Proton Accelerator Research Complex (J-PARC). The targeted energy range is 5-300meV, and the spectrometer is optimized in intensity in this energy range by moderating the resolutions (
% at 
), by incorporating an efficient beam transport system, and by realizing multi incident energy (
) measurement. The high intensity and efficiency available at 4SEASONS make this spectrometer suitable for study of novel quantum phenomena in high- superconductors and related systems. In the present paper, we will report the current status of the development and the construction of 4SEASONS, such as construction of the vacuum tank and the shielding, development of the new Fermi chopper for the multi- measurement, 2.5m-long He PSDs, and the beam transport system.
Ishizaka, Tomohisa; Imai, Koji; Yuri, Yosuke; Yuyama, Takahiro; Ishibori, Ikuo; Okumura, Susumu; Yoshida, Kenichi; Kurashima, Satoshi; Miyawaki, Nobumasa; Kashiwagi, Hirotsugu; et al.
no journal, ,
no abstracts in English
Haruyama, Yasuyuki; Takizawa, Haruki; Hosono, Masakazu; Mizuhashi, Kiyoshi*; Nakamura, Yoshiteru*; Kaneya, Satoshi*; Asai, Takahiro*; Kawabata, Michiko*; Imai, Koji*
no journal, ,
Usage situation of TIARA facility is reported. At 2012 fiscal year, TIARA facility was operated as planned without large external factors(Large earthquake, Power reduction requests, etc.). At trends in research field between 1991-2012, challenges of medical and biotechnology is increased and the using ratio of cyclotron is highest in the research field. At the electrostatic accelerators, the using ratio of fundamental technology development has increasing significantly in these 20 years. In addition, external user number is stable 800 or so people in these four years.
