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Kawamura, Seiko; Takahashi, Ryuta*; Ishikado, Motoyuki*; Yamauchi, Yasuhiro*; Nakamura, Masatoshi*; Ouchi, Keiichi*; Kira, Hiroshi*; Kambara, Wataru*; Aoyama, Kazuhiro*; Sakaguchi, Yoshifumi*; et al.
Journal of Neutron Research, 21(1-2), p.17 - 22, 2019/05
The Cryogenics and Magnets group in the Sample Environment team is responsible for operation of cryostats and magnets for user's experiments at the MLF in J-PARC. We have introduced a top-loading He cryostat, a bottom-loading He cryostat, a dilution refrigerator insert and a superconducting magnet. The frequency of use of them dramatically becomes higher in these two years, as the beam power and the number of proposal increase. To respond such situation, we have made efforts to enhance performance of these equipment as follows. The He cryostat originally involves an operation software for automatic initial cooling down to the base temperature and automatic re-charge of He. Recently we made an additional program for automatic temperature control with only the sorb heater. Last year, a new outer vacuum chamber of the magnet with an oscillating radial collimator (ORC) was fabricated. The data quality was drastically improved by introducing this ORC so that the magnet can be used even for the inelastic neutron scattering experiments.
Suganuma, Kazuaki; Shimoyama, Nobuyoshi*; Yonekyu, Naoyuki*; Taki, Yukina*; Kinsho, Michikazu
Proceedings of 12th Annual Meeting of Particle Accelerator Society of Japan (Internet), p.686 - 688, 2015/09
no abstracts in English
Nakamoto, Tatsushi*; Idesaki, Akira; Morishita, Norio; Ito, Hisayoshi; Kamiya, Tomihiro; Kimura, Nobuhiro*; Makida, Yasuhiro*; Ogitsu, Toru*; Ohata, Hirokatsu*; Yamamoto, Akira*
AIP Conference Proceedings 824, p.225 - 232, 2006/03
Radiation resistance with respect to mechanical properties of organic materials used in the superconducting magnets for the 50 GeV - 750 kW proton beam line for the J-PARC neutrino experiment was studied. Specimens cooled at liquid nitrogen temperature of 77 K were irradiated by gamma rays beyond 10 MGy. The flexural strength of glass-fiber reinforced plastics (GFRPs), the tear strength of polyimide films and the tensile lap-shear strength of adhesive films were evaluated. It was verified that the organic materials used in the superconducting magnet have a sufficient radiation resistance, and the degradation of their mechanical properties after 10 years operation was estimated to be negligible.
Wachi, Y.*; Hanai, S.*; *; *; *; Hamajima, Takataro*; *; Nakajima, Hideo; Tsuji, Hiroshi; Shinoda, K.*; et al.
Teion Kogaku, 33(7), p.479 - 484, 1998/00
no abstracts in English
Sugimoto, Makoto; *; Isono, Takaaki; Koizumi, Norikiyo; Nakajima, Hideo; Kato, Takashi; Nishi, Masataka; Takahashi, Yoshikazu; Ando, Toshinari; Tsuji, Hiroshi; et al.
IEEE Transactions on Magnetics, 32(4), p.2328 - 2331, 1996/07
Times Cited Count:6 Percentile:50.82(Engineering, Electrical & Electronic)no abstracts in English
Seki, Yasushi
Fusion Engineering and Design, 25, p.49 - 66, 1994/00
Times Cited Count:2 Percentile:28.05(Nuclear Science & Technology)no abstracts in English
*; *; Seki, Yasushi
Purazuma, Kaku Yugo Gakkai-Shi, 68(5), p.511 - 515, 1992/11
no abstracts in English
Sugimoto, Makoto
JAERI-M 90-038, 49 Pages, 1990/03
no abstracts in English
;
Teion Kogaku, 18(4), p.193 - 199, 1983/00
no abstracts in English
; ; *; *; *
JAERI-M 9358, 20 Pages, 1981/02
no abstracts in English
;
Teion Kogaku, 15(3), p.173 - 178, 1980/00
no abstracts in English
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Proc.of Nonmetallic Materials and Composites at Low Temperature, p.155 - 163, 1979/00
no abstracts in English
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Teion Kogaku, 14(4), p.178 - 183, 1979/00
no abstracts in English
; *
Journal of Nuclear Materials, 72(1-2), p.244 - 248, 1978/02
Times Cited Count:1no abstracts in English
;
Teion Kogaku, 13(5), p.243 - 249, 1978/00
no abstracts in English
JAERI-M 6816, 53 Pages, 1976/12
no abstracts in English