Research Output 1979 2019

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Conference article
2019

Active magnetic bearing for a liquid nitrogen pump

Kamioka, Y., Kajikawa, K., Hirai, H., Ozaki, S., Nakamura, T., Imagawa, S. & Ishiyama, A., Jun 3 2019, In : IOP Conference Series: Materials Science and Engineering. 502, 1, 012153.

Research output: Contribution to journalConference article

Open Access
Bearings (structural)
Magnetic bearings
Liquid nitrogen
Pumps
Submersible pumps

Development of monitor system for parallel-type superconducting level sensor for liquid hydrogen

Tanaka, N., Kajikawa, K., Oguro, H., Sugino, M., Nakanishi, T. & Aoki, I., Oct 15 2019, In : Journal of Physics: Conference Series. 1293, 1, 012041.

Research output: Contribution to journalConference article

Open Access
liquid hydrogen
monitors
isolators
wire
digital to analog converters

Numerical analysis on the influence of armature winding configuration on AC loss of 10 MW fully superconducting generators of electric aircrafts

Komiya, M., Aikawa, T., Yoshida, K., Miura, S., Iwakuma, M., Yoshida, T., Sasayama, T., Tomioka, A., Konno, M. & Izumi, T., Oct 15 2019, In : Journal of Physics: Conference Series. 1293, 1, 012074.

Research output: Contribution to journalConference article

Open Access
fly by wire control
armatures
numerical analysis
alternating current
generators

Optimum design of cryogenic pump for circulation cooling of high temperature superconducting cables

Tadakuma, K., Kajikawa, K., Kamioka, Y., Ishiyama, A., Imagawa, S., Nakamura, T., Hirai, H. & Ozaki, S., Oct 15 2019, In : Journal of Physics: Conference Series. 1293, 1, 012070.

Research output: Contribution to journalConference article

Open Access
cables
cryogenics
pressure drop
liquid nitrogen
pumps
2018
1 Citation (Scopus)

Magnetometer based on transfer and modulation of magnetic flux using high-critical-temperature superconductor coils

Enpuku, K., Matsuo, M., Yoshida, Y., Yamashita, S., Sasayama, T. & Yoshida, T., Jul 26 2018, In : Journal of Physics: Conference Series. 1054, 1, 012058.

Research output: Contribution to journalConference article

magnetometers
magnetic flux
critical temperature
coils
modulation
2017
1 Citation (Scopus)

Numerical reproduction of screening-current-induced fields in HTS tape windings using finite element method

Okabe, Y., Honda, T. & Kajikawa, K., Jul 26 2017, In : Journal of Physics: Conference Series. 871, 1, 012047.

Research output: Contribution to journalConference article

tapes
finite element method
screening
conductors
vector currents
2012
2 Citations (Scopus)

Performance of pickup coil made of Litz wire and coupled to HTS SQUID

Enpuku, K., Momotomi, R., Mihaya, T., Matsuo, M., Yoshida, T., Kandori, A., Tanabe, K., Adachi, S. & Tsukamoto, A., Jan 1 2012, In : Physics Procedia. 36, p. 400-404 5 p.

Research output: Contribution to journalConference article

coils
wire
sensors
thermal noise
ramps
4 Citations (Scopus)

Proposal of a new type of superconducting level sensor for liquid hydrogen with MgB2 wires

Kajikawa, K., Inoue, T., Watanabe, K., Kanazawa, M., Yamada, Y., Kobayashi, H., Taguchi, H. & Aoki, I., Jan 1 2012, In : Physics Procedia. 36, p. 1396-1401 6 p.

Research output: Contribution to journalConference article

liquid hydrogen
proposals
wire
sensors
heat balance
2005
4 Citations (Scopus)

Magnetization loss properties of thin superconducting tapes with field-dependent critical current

Kajikawa, K., Hayashi, T., Nakamura, D. & Funaki, K., Oct 7 2005, In : Physica C: Superconductivity and its applications. 426-431, II, p. 1295-1301 7 p.

Research output: Contribution to journalConference article

Superconducting tapes
Critical currents
Tapes
tapes
Magnetization
1 Citation (Scopus)

Magnetometer utilizing SQUID pico-voltmeter and cooled normal pickup coil

Yang, T. Q., Yao, K., Yamasaki, D. & Enpuku, K., Oct 7 2005, In : Physica C: Superconductivity and its applications. 426-431, II, p. 1596-1600 5 p.

Research output: Contribution to journalConference article

Voltmeters
voltmeters
Pickups
SQUIDs
Magnetometers
4 Citations (Scopus)

Numerical calculations of AC losses in parallel tape conductors with fixed share of transport current in external magnetic field

Hayashi, T., Kajikawa, K., Iwakuma, M. & Funaki, K., Oct 7 2005, In : Physica C: Superconductivity and its applications. 426-431, II, p. 1328-1332 5 p.

Research output: Contribution to journalConference article

strands
Tapes
tapes
alternating current
conductors
2003
10 Citations (Scopus)

Ac loss properties of a 4 kJ conduction-cooled pulse coil wound with a Bi2223 6-strand parallel conductor for SMES

Iwakuma, M., Miyazaki, H., Fukuda, Y., Kajikawa, K., Funaki, K., Tsutsumi, K., Hayashi, H., Kimura, H., Tomioka, A., Bohno, T. & Yagi, Y., Jun 1 2003, In : IEEE Transactions on Applied Superconductivity. 13, 2 II, p. 1882-1885 4 p.

Research output: Contribution to journalConference article

Helium
strands
coils
conductors
Gases
37 Citations (Scopus)

High Tc SQUID system and magnetic marker for biological immunoassays

Enpuku, K., Kuroda, D., Yang, T. Q. & Yoshinaga, K., Jun 1 2003, In : IEEE Transactions on Applied Superconductivity. 13, 2 I, p. 371-376 6 p.

Research output: Contribution to journalConference article

immunoassay
SQUIDs
markers
Nanoparticles
nanoparticles
4 Citations (Scopus)

Influence of vacuum region on AC losses in superconducting wires with 2D FEM formulated by self-magnetic field

Kajikawa, K., Hayashi, T., Yoshida, R., Iwakuma, M. & Funaki, K., Oct 1 2003, In : Physica C: Superconductivity and its applications. 392-396, PART 2, p. 1113-1117 5 p.

Research output: Contribution to journalConference article

Superconducting wire
alternating current
wire
Vacuum
Magnetic fields
5 Citations (Scopus)

Magnetic field angular dependence of AC losses in Bi-2223 superconducting wires

Iwakuma, M., Fukuda, Y., Fukui, M., Kajikawa, K. & Funaki, K., Oct 1 2003, In : Physica C: Superconductivity and its Applications. 392-396, PART 2, p. 1096-1101 6 p.

Research output: Contribution to journalConference article

Superconducting wire
tapes
Superconducting tapes
alternating current
wire
45 Citations (Scopus)

Numerical evaluation of AC losses in HTS wires with 2D FEM formulated by self magnetic field

Kajikawa, K., Hayashi, T., Yoshida, R., Iwakuma, M. & Funaki, K., Jun 1 2003, In : IEEE Transactions on Applied Superconductivity. 13, 2 III, p. 3630-3633 4 p.

Research output: Contribution to journalConference article

Superconducting wire
alternating current
critical temperature
finite element method
wire
13 Citations (Scopus)

SQUID magnetometer utilizing normal pickup coil and resonant-type coupling circuit

Yang, T. Q. & Enpuku, K., Oct 1 2003, In : Physica C: Superconductivity and its applications. 392-396, PART 2, p. 1396-1400 5 p.

Research output: Contribution to journalConference article

coupling circuits
Coupled circuits
Pickups
SQUIDs
Magnetometers
2002
3 Citations (Scopus)

Feasibility study of oxide superconducting transformers for Shinkansen rolling stock

Iwakuma, M., Matsumura, K., Miyazaki, H., Kajikawa, K., Funaki, K., Hata, H., Fujimoto, H. & Kamijo, H., Mar 1 2002, In : IEEE Transactions on Applied Superconductivity. 12, 1, p. 828-832 5 p.

Research output: Contribution to journalConference article

Superconducting wire
transformers
Oxides
oxides
Critical currents
2001
64 Citations (Scopus)

Ac loss properties of a 1MVA single-phase HTS power transformer

Iwakuma, M., Funaki, K., Kajikawa, K., Tanaka, H., Bohno, T., Tomioka, A., Yamada, H., Nose, S., Konno, M., Yagi, Y., Maruyama, H., Ogata, T., Yoshida, S., Ohashi, K., Tsutsumi, K. & Honda, K., Mar 1 2001, In : IEEE Transactions on Applied Superconductivity. 11, 1 II, p. 1482-1485 4 p.

Research output: Contribution to journalConference article

Power transformers
transformers
Liquid nitrogen
liquid nitrogen
Thermal load
58 Citations (Scopus)

Application of high Tc SQUID magnetometer to biological immunoassays

Enpuku, K., Minotani, T., Hotta, M. & Nakahodo, A., Mar 1 2001, In : IEEE Transactions on Applied Superconductivity. 11, 1 I, p. 661-664 4 p.

Research output: Contribution to journalConference article

immunoassay
SQUIDs
Magnetometers
markers
magnetometers
73 Citations (Scopus)

Development of a 22kV/6.9kV single-phase model for a 3MVA HTS power transformer

Funaki, K., Iwakuma, M., Kajikawa, K., Hara, M., Suehiro, J., Ito, T., Takata, Y., Bohno, T., Nose, S. I., Konno, M., Yagi, Y., Maruyama, H., Ogata, T., Yoshida, S., Ohashi, K., Kimura, H. & Tsutsumi, K., Mar 1 2001, In : IEEE Transactions on Applied Superconductivity. 11, 1 II, p. 1578-1581 4 p.

Research output: Contribution to journalConference article

Power transformers
transformers
Liquid nitrogen
Tapes
field tests
15 Citations (Scopus)

Numerical simulation for AC losses of HTS tapes in combined alternating transport current and external AC magnetic field with phase shift

Kajikawa, K., Takenaka, A., Kawasaki, K., Iwakuma, M. & Funaki, K., Mar 1 2001, In : IEEE Transactions on Applied Superconductivity. 11, 1 II, p. 2240-2243 4 p.

Research output: Contribution to journalConference article

Phase shift
Tapes
tapes
alternating current
phase shift
2000
17 Citations (Scopus)

Current distribution in superconducting parallel conductors wound into pancake coils

Iwakuma, M., Nishimura, K., Kajikawa, K., Funaki, K., Hayashi, H., Tsutsumi, K., Tomioka, A., Konoo, M. & Nose, S., Jan 1 2000, In : IEEE Transactions on Applied Superconductivity. 10, 1, p. 861-864 4 p.

Research output: Contribution to journalConference article

current distribution
strands
coils
conductors
Fabrication