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Journal Articles

A New model to simulate critical current degradation of a large CICC by taking into account strand bending

Koizumi, Norikiyo; Nunoya, Yoshihiko; Okuno, Kiyoshi

IEEE Transactions on Applied Superconductivity, 16(2), p.831 - 834, 2006/06

 Times Cited Count:24 Percentile:26.36(Engineering, Electrical & Electronic)

no abstracts in English

Journal Articles

Experimental results of ITER Nb$$_{3}$$Al insert; Characteristics of acoustic emission

Ninomiya, 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

The charge test of Central Solenoid Model Coil(CSMC) and Toroidal Field Insert Coil(TFIC) were carried out fo about one month from September 2001 with international collaboration under ITER EDA. In the experiment, Acoustic Emission(AE) signals were measured which were induced from CSMC and TFIC. It was the first trial to measure the AE signals from the insert coil directly. Relations among AE signals from TFIC, intensity, number and voltages are discussed in this paper.

Journal Articles

Monte Carlo simulation of strand position in CIC Conductor

Aoki, Kosuke*; Izumi, Yoshinobu*; Nishijima, Shigehiro*; Okuno, Kiyoshi; Koizumi, Norikiyo

IEEE Transactions on Applied Superconductivity, 13(2), p.1744 - 1747, 2003/06

 Times Cited Count:1 Percentile:87(Engineering, Electrical & Electronic)

The strand position in CIC conductor consisting of 1,152(3$$times$$4$$times$$4$$times$$4$$times$$6) strands was analytically evaluated using Monte Carlo method. During the conductor fabrication, the conduit was compressed with the cable to fix the size and shape from one end. This makes the strands to be stretched along the axis. In the calculation, such manufacturing process was simulated. In addition, the contact energy between strands and the strain energy in the strands are considered. The calculation results show that the strands are moved by compressing the conduit. By this calculation, not only strand positions but also the distribution of contact stress between strands could be evaluated.

Journal Articles

Development of ITER toroidal field insert; International collaboration with Russia

Sugimoto, Makoto; Nakajima, Hideo; Kato, Takashi; Okuno, Kiyoshi; Tsuji, Hiroshi; Rodin, I.*; Egorov, S. A.*

Teion Kogaku, 37(10), p.513 - 522, 2002/10

The Central Solenoid (CS) model coil programme has been carrying out since 1992 as a back born project in International Thermonuclear Experimental Reactor (ITER) Engineering Design Activity (EDA). The CS model coil programme has a plan to develop the toroidal fieled (TF) insert to demonstrate the conductor performance of ITER real TF coils under 13 T of magnetic flux density. The fabrication of TF insert was completed on May 2001 by D.V.Efremov Scientific Research Institute for Electrophysical Apparatus(Efremov institute) at St. Petersburg, Russia. Experiments including the cooldown and warmup were completed November 2001 at JAERI Naka. TF insert was achieved to charge up to 13T with 46kA without training under the back up magnetic field by the CS model coil.

Journal Articles

Completion of CS insert fabrication

Sugimoto, Makoto; Isono, Takaaki; Nunoya, Yoshihiko; Koizumi, Norikiyo; Nakajima, Hideo; Kato, Takashi; Matsukawa, Makoto; Hamada, Kazuya; Matsui, Kunihiro; Nishijima, Gen; et al.

IEEE Transactions on Applied Superconductivity, 10(1), p.564 - 567, 2000/03

 Times Cited Count:22 Percentile:27.12(Engineering, Electrical & Electronic)

no abstracts in English

Journal Articles

Induced circulatin current in a conductor consisting of strands coated with high resistive layer

Koizumi, Norikiyo; Takahashi, Yoshikazu; Kato, Takashi; Tsuji, Hiroshi; Shimamoto, Susumu*

Teion Kogaku, 35(3), p.132 - 142, 2000/03

no abstracts in English

Journal Articles

Development of a 13-T and 40-kA Nb$$_{3}$$Al conductor for toroidal coils of fusion reactors

Koizumi, Norikiyo; Ando, Toshinari; Sugimoto, Makoto; Takahashi, Yoshikazu; Tsuji, Hiroshi; Shimamoto, Susumi; Yamada, Yuichi*; *; *

Fusion Engineering and Design, 41, p.277 - 281, 1998/00

 Times Cited Count:6 Percentile:48.02

no abstracts in English

JAEA Reports

Effect of current imbalance on stability of a cable-in-conduit conductor consisting of chrome-plated strands

Koizumi, Norikiyo; Takahashi, Yoshikazu; Nishi, Masataka; Isono, Takaaki; Tsuji, Hiroshi; *; *; Fujioka, T.*

JAERI-Research 97-002, 15 Pages, 1997/02

JAERI-Research-97-002.pdf:0.82MB

no abstracts in English

Journal Articles

Effect of perturbation length on the stability of a cable-in-conduit conductor

Koizumi, Norikiyo; *; Nishi, Masataka; K.Macfall*; Takahashi, Yoshikazu; Tsuji, Hiroshi; N.Mitchell*

Proc. of 15th Int. Conf. on Magnet Technology (MT-15), p.449 - 452, 1997/00

no abstracts in English

Journal Articles

Quench analysis of 46kA-13T Nb$$_{3}$$Al insert coil

Takeuchi, Kazuhiro*; *; *; Asano, Katsuhiko*; Koizumi, Norikiyo; Ando, Toshinari; *; Tsuji, Hiroshi; Okuno, Kiyoshi

Proc. of 15th Int. Conf. on Magnet Technology (MT-15), p.417 - 420, 1997/00

no abstracts in English

Journal Articles

Dependence of CICC's stability on coolant flow rate

*; Koizumi, Norikiyo; K.Macfall*; Ando, Toshinari; Takahashi, Yoshikazu; Tsuji, Hiroshi

Proc. of 15th Int. Conf. on Magnet Technology (MT-15), p.1299 - 1302, 1997/00

no abstracts in English

Journal Articles

Calibration of inductive heating energy deposited on a cable-in-conduit conductor using a calorimetric method

Koizumi, Norikiyo; *; Matsui, Kunihiro; Isono, Takaaki; Hamada, Kazuya; Takahashi, Yoshikazu; Tsuji, Hiroshi

Teion Kogaku, 32(6), p.263 - 270, 1997/00

no abstracts in English

Journal Articles

Design of the CS insert coil

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:48.11(Engineering, Electrical & Electronic)

no abstracts in English

JAEA Reports

Implicit time-dependent finite different algorithm for quench simulation

Koizumi, Norikiyo; Takahashi, Yoshikazu; Tsuji, Hiroshi

JAERI-Data/Code 94-017, 19 Pages, 1994/12

JAERI-Data-Code-94-017.pdf:0.91MB

no abstracts in English

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