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Teshigawara, Makoto; Nakamura, Mitsutaka; Kinsho, Michikazu; Soyama, Kazuhiko
JAEA-Technology 2021-022, 208 Pages, 2022/02
JAEA-Technology-2021-022.pdf:14.28MB
The Materials and Life science experimental Facility (MLF) is an accelerator driven pulsed spallation neutron and muon source with a 1 MW proton beam. The construction began in 2004, and we started beam operation in 2008. Although problems such as exudation of cooling water from the target container have occurred, as of April 2021, the proton beam power has reached up to 700 kW gradually, and stable operation is being performed. In recent years, the operation experience of the rated 1 MW has been steadily accumulated. Several issues such as the durability of the target container have been revealed according to the increase in the operation time. Aiming at making a further improvement of MLF, we summarized the current status of achievements for the design values, such as accelerator technology (LINAC and RCS), neutron and muon source technology, beam transportation of these particles, detection technology, and neutron and muon instruments. Based on the analysis of the current status, we tried to extract improvement points for upgrade of MLF. Through these works, we will raise new proposals that promote the upgrade of MLF, attracting young people. We would like to lead to the further success of researchers and engineers who will lead the next generation.
Aso, Tomokazu; Teshigawara, Makoto; Hasegawa, Shoichi; Muto, Hideki; Aoyagi, Katsuhiro; Nomura, Kazutaka; Takada, Hiroshi
Journal of Physics; Conference Series, 1021(1), p.012085_1 - 012085_4, 2018/06
Times Cited Count：0 Percentile：0.00(Nuclear Science & Technology)Katagiri, Masaki; Birumachi, Atsushi; Sakasai, Kaoru; Takahashi, Koji*
IEEE Transactions on Nuclear Science, 50(4), p.1043 - 1047, 2003/08
Times Cited Count：3 Percentile：24.91(Engineering, Electrical & Electronic)no abstracts in English
Igarashi, Koichi*; Seki, Masami; Shimono, Mitsugu; Terakado, Masayuki; Ishii, Kazuhiro*; Takahashi, Masami*
JAERI-Tech 2003-030, 40 Pages, 2003/03
JAERI-Tech-2003-030.pdf:5.83MB
The JT-60U electron cyclotron heating (ECH) system can heat plasmas locally and drive a plasma current with four 1 MW-5 sec gyrotrons. The super conducting magnets (SCM) are required for oscillation of the gyrotron at a working frequency of 110 GHz. The SCM provides a high magnetic field of 4.5T at the cavity inside the gyrotron. This SCM system is characterized by (1) operation without liquid Helium owing to a 4 K-refrigerator applied to the magnetic coils, (2) easy maintenance. Operational experiences about the SCM system through a long term experiment for a high power gyrotron are very valuable. According to those operational experiences, it is clarified the 4 K-refrigerator should be renewed in oder to keep low temperature of the SCM. It is also found that 200 hours or less are required for the super conducting condition (
5K) after long stopping time of the refrigerator up to 150 hours. This is useful information for making a plan about ECH experiments.
Kato, Takashi; Nakajima, Hideo; Isono, Takaaki; Hamada, Kazuya; Kawano, Katsumi; Sugimoto, Makoto; Nunoya, Yoshihiko; Koizumi, Norikiyo; Matsui, Kunihiro; Oshikiri, Masayuki*; et al.
Teion Kogaku, 36(6), p.315 - 323, 2001/06
no abstracts in English
Minehara, Eisuke; Sugimoto, Masayoshi; Sawamura, Masaru; Nagai, Ryoji; Kikuzawa, Nobuhiro; Nishimori, Nobuyuki
Proc. of 11th Symp. on Accelerator Sci. and Technol., P. 236, 1997/00
no abstracts in English
Kikuzawa, Nobuhiro; Nagai, Ryoji; Sawamura, Masaru; Nishimori, Nobuyuki; Minehara, Eisuke;
Proc. of 8th Workshop on RF Superconductivity, 3, p.769 - 773, 1997/00
no abstracts in English
; ; Fujii, Terushige*; ; ; ; Matsubayashi, Masahito; Tsuruno, Akira
Fifth World Conf. on Neutron Radiography, 0, p.623 - 629, 1996/00
no abstracts in English
; ; Fujii, Terushige*; ; ; ; Matsubayashi, Masahito; Tsuruno, Akira
Nuclear Instruments and Methods in Physics Research A, 377, p.170 - 173, 1996/00
Times Cited Count：0 Percentile：0.00(Instruments & Instrumentation)no abstracts in English
; ; Kato, Takashi; Kawano, Katsumi; Hiyama, Tadao; ; ; Otsu, K.*; ; Tsuji, Hiroshi
Cryogenics, 34(Suppl.), p.65 - 68, 1994/00
no abstracts in English
; Minehara, Eisuke; Sawamura, Masaru; Nagai, Ryoji; Takao, Masaru*; Sugimoto, Masayoshi; Okubo, Makio; ; Suzuki, Yasuo; Kawarasaki, Yuki*
Nuclear Instruments and Methods in Physics Research A, 331, p.276 - 281, 1993/00
Times Cited Count：15 Percentile：78.94(Instruments & Instrumentation)no abstracts in English
; Kato, Takashi; Tada, Eisuke; Hiyama, Tadao; Kawano, Katsumi; ; Shimamoto, Susumi
JAERI-M 89-040, 37 Pages, 1989/03
no abstracts in English
; Hiyama, Tadao; Kato, Takashi; ;
Teion Kogaku, 19(2), p.139 - 152, 1984/00
no abstracts in English
Aso, Tomokazu; Teshigawara, Makoto; Ariyoshi, Gen; Haga, Katsuhiro
no journal, ,
Aso, Tomokazu; Teshigawara, Makoto; Hasegawa, Shoichi; Muto, Hideki*; Aoyagi, Katsuhiro*; Takada, Hiroshi
no journal, ,
