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Hamada, Kazuya; Takahashi, Yoshikazu; Matsui, Kunihiro; Kato, Takashi; Okuno, Kiyoshi
Cryogenics, 44(1), p.45 - 52, 2004/01
Times Cited Count：21 Percentile：61.28(Thermodynamics)In the ITER Central Solenoid Model Coil (CSMC) and a CS Insert Coil (CSIC) experiment, a pressure drop of the CSIC decreased by about 12% at 40 kA, 10 T and coupling losses indicated an transport current dependence. As a result of pressure drop analysis, an electromagnetic force causes a compressive deformation of cable in a jacket and a new flow passage was generated as a gap between cable and jacket. The cable deformation causes a decrease of a contact electrical resistance between strands and an increase of coupling losses. Taking account of the electromagnetic force dependency of a coupling time constant, calculated coupling losses show a good agreement with measured coupling losses at a pulsed operation of CSMC and CSIC.
Al cable-in-conduit conductor under electromagnetic force; Relation between pressure drop characteristics and cable stiffnessHamada, Kazuya; Matsui, Kunihiro; Takahashi, Yoshikazu; Nakajima, Hideo; Kato, Takashi; CS Model Coil Test Group
Teion Kogaku, 38(8), p.417 - 424, 2003/08
As one of the R&D of ITER. a hydraulic performance of NbAl insert coil was measured and compared with other NbSn conductors. It seems that a longer twist pitch will promote a triangle helium flow space among 4th twist stage cables, jacket and center channel and contribute reduction of pressure drop. Under 500 kN/m of the electromagnetic force, the pressure drop of the NbAl insert decreased by approximately 5%. NbAl conductor indicated quit rigid characteristic under the electromagnetic force and suitable for future magnet with higher magnetic field and current.
Al insert; Characteristics of acoustic emissionNinomiya, Akira*; Arai, Kazuaki*; Takano, Katsutoshi*; Tsugawa, Kazuhito*; Ishigooka, Takeshi*; Kaiho, Katsuyuki*; Nakajima, Hideo; Okuno, Kiyoshi; CS Model Coil Test Group
Teion Kogaku, 38(8), p.425 - 433, 2003/08
no abstracts in English
Matsui, Kunihiro; Takahashi, Yoshikazu; Koizumi, Norikiyo; Isono, Takaaki; Hamada, Kazuya; Nunoya, Yoshihiko; CS Model Coil Test Group
Teion Kogaku, 38(8), p.410 - 416, 2003/08
The test of the ITER Central Solenoid (CS) model coil, CS and NbAl inserts was carried. The AC loss measurement is one of the most important tests to determine coil performance. The coupling losses of CS and NbAl inserts were measured by calorimetric and magnetization methods, respectively. Both coils had coupling losses with many coupling time constant, and induced circulation currents were observed by voltage taps and hall sensors. Coupling losses decreased with exponential decay constants since the electromagnetic force broke weak sinter among the strands. The gap, created between the cable and the conduit by electromagnetic force, is dependent on the pressure drop of the coolant that flows in the conductor. Our analysis shows that the exponential decay constant of coupling losses is dependent on the gap size. If we can evaluate this exponential decay constant and apply the electromagnetic force that corresponds for the exponential decay constant to the conductor before the regular operation, we can use coils of the condition that coupling losses decrease on the operation.
Al insert experiment log book; 3rd Experiment of CS model coilSugimoto, Makoto; Koizumi, Norikiyo; Isono, Takaaki; Matsui, Kunihiro; Nunoya, Yoshihiko; Tsutsumi, Fumiaki*; Oshikiri, Masayuki*; Wakabayashi, Hiroshi*; Okuno, Kiyoshi; Tsuji, Hiroshi
JAERI-Tech 2002-080, 100 Pages, 2002/11
JAERI-Tech-2002-080.pdf:7.89MB
The cool down of CS model coil and NbAl insert was started on March 4, 2002. It took almost one month and immediately started coil charge since April 3, 2002. The charge test of NbAl insert and CS model coil was completed on May 2, 2002. All of the experiments including the warm up was also completed on May 30, 2002.In this campaign, total shot numbers were 102 and the size of the data file in the DAS (Data Acquisition System) was about 5.2 GB. This report is a database that consists of the log list and the log sheets of every shot.
Nunoya, Yoshihiko; Sugimoto, Makoto; Isono, Takaaki; Hamada, Kazuya; Matsui, Kunihiro; Okuno, Kiyoshi; CS Model Coil Test Group
Teion Kogaku, 37(10), p.523 - 530, 2002/10
Vurrent sharing temperature (Tcs) measurement of ITER toroidal field insert was performed. The coil is NbSn superconducting coil and was installed inside of the ITER CS model coil as a backup field coil. Relation between the voltage of individual strand composing TF insert conductor and the measured voltage using the taps on the jacket is investigated and the evaluation method for Tcs measurement was established. The obtained results shows that there was discrepancy between the expected value from the strand data and the measured value which is lower by about 1.2K. Some discrepancy was already observed just after cool down of the insert before energizing.
Hamada, Kazuya; Takahashi, Yoshikazu; Matsui, Kunihiro; Kato, Takashi; Okuno, Kiyoshi
Teion Kogaku, 37(6), p.257 - 264, 2002/06
no abstracts in English
Sugimoto, Makoto; Isono, Takaaki; Matsui, Kunihiro; Nunoya, Yoshihiko; Tsutsumi, Fumiaki*; Tamiya, Tadatoshi*; Oshikiri, Masayuki*; Wakabayashi, Hiroshi*; Okuno, Kiyoshi; Tsuji, Hiroshi
JAERI-Tech 2001-085, 104 Pages, 2001/12
JAERI-Tech-2001-085.pdf:4.64MB
no abstracts in English
Isono, Takaaki; Matsui, Kunihiro; Kato, Takashi; Takahashi, Yoshikazu; CS Model Coil Test Group; Hasegawa, Mitsuru*
Teion Kogaku, 36(6), p.373 - 380, 2001/06
no abstracts in English
Matsui, Kunihiro; Nunoya, Yoshihiko; Kawano, Katsumi; Takahashi, Yoshikazu; Nishii, Kenji*; CS Model Coil Test Group
Teion Kogaku, 36(6), p.361 - 367, 2001/06
no abstracts in English
Isono, Takaaki; Nishijima, Gen; Sugimoto, Makoto; Nunoya, Yoshihiko; Wakabayashi, Hiroshi*; Tsuji, Hiroshi
JAERI-Tech 2000-084, 393 Pages, 2001/02
JAERI-Tech-2000-084.pdf:16.39MB
no abstracts in English
Shimakawa, Satoshi; Tabata, Toshio; Komukai, Bunsaku
JAERI-Data/Code 99-045, p.31 - 0, 1999/11
JAERI-Data-Code-99-045.pdf:1.22MB
no abstracts in English
Sugimoto, Makoto; Isono, Takaaki; Koizumi, Norikiyo; Nakajima, Hideo; Kato, Takashi; Hamada, Kazuya; Nunoya, Yoshihiko; Matsui, Kunihiro; Sawada, Kenji*; Takahashi, Yoshikazu; et al.
IEEE Transactions on Applied Superconductivity, 9(2), p.636 - 639, 1999/06
Times Cited Count：1 Percentile：17.18(Engineering, Electrical & Electronic)no abstracts in English
Sugimoto, Makoto; *; Isono, Takaaki; Koizumi, Norikiyo; Nakajima, Hideo; Kato, Takashi; Nunoya, Yoshihiko; Matsui, Kunihiro; Takahashi, Yoshikazu; Ando, Toshinari; et al.
Proc. of 15th Int. Conf. on Magnet Technology (MT-15), p.409 - 412, 1997/00
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：50.91(Engineering, Electrical & Electronic)no abstracts in English
Kaneko, Yoshihiko*; Yamane, Tsuyoshi; Shimakawa, Satoshi; Yamashita, Kiyonobu
Nihon Genshiryoku Gakkai-Shi, 38(11), p.907 - 911, 1996/00
Times Cited Count：0 Percentile：0.01(Nuclear Science & Technology)no abstracts in English
Isono, Takaaki; Kawano, Katsumi; Ozeki, Hidemasa; Saito, Toru; Nabara, Yoshihiro; Suwa, Tomone; Shimono, Mitsugu; Ebisawa, Noboru; Sato, Minoru; Uno, Yasuhiro; et al.
no journal, ,
JAEA is procuring conductors for ITER Central Solenoid (CS) and has evaluated its superconducting performance using CS Model Coil Test facility. We measured Tcs values during cyclic charge of 16,000 cycles and warm-up and cool-down cycle of 3 times. And we measured effect of coil deformation by electro-magnetic force on Tcs values and performed quench test. In this presentation, test method will be reported.
Ozeki, Hidemasa; Suwa, Tomone; Isono, Takaaki; Takahashi, Yoshikazu; Kawano, Katsumi; Nabara, Yoshihiro; Saito, Toru; Nunoya, Yoshihiko
no journal, ,
no abstracts in English
