Research Output 1979 2019

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

Design study of 10 mw rebco fully superconducting synchronous generator for electric aircraft

Komiya, M., Aikawa, T., Sasa, H., Miura, S., Iwakuma, M., Yoshida, T., Sasayama, T., Tomioka, A., Konno, M. & Izumi, T., Aug 1 2019, In : IEEE Transactions on Applied Superconductivity. 29, 5, 8675517.

Research output: Contribution to journalArticle

fly by wire control
Synchronous generators
radiant flux density
generators
Aircraft

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

Eddy Current Testing Using Square-wave Inverter for Thickness Inspection of Steel Plate

Sasayama, T. & Enpuku, K., Jan 1 2019, In : Sensors and Materials. 31, 10, p. 3023-3032 10 p.

Research output: Contribution to journalArticle

Open Access
Eddy current testing
Steel
square waves
eddy currents
inspection

Effect of viscosity on the AC magnetization of magnetic nanoparticles under different AC excitation fields

Yoshida, T., Nakamura, T., Higashi, O. & Enpuku, K., Feb 1 2019, In : Journal of Magnetism and Magnetic Materials. 471, p. 334-339 6 p.

Research output: Contribution to journalArticle

Magnetization
alternating current
Viscosity
viscosity
Nanoparticles
3 Citations (Scopus)

Effects of size and anisotropy of magnetic nanoparticles associated with dynamics of easy axis for magnetic particle imaging

Ota, S., Matsugi, Y., Nakamura, T., Takeda, R., Takemura, Y., Kato, I., Nohara, S., Sasayama, T., Yoshida, T. & Enpuku, K., Mar 15 2019, In : Journal of Magnetism and Magnetic Materials. 474, p. 311-318 8 p.

Research output: Contribution to journalArticle

Anisotropy
Nanoparticles
harmonics
Imaging techniques
nanoparticles
1 Citation (Scopus)

Low-frequency eddy current testing using HTS coil driven by PWM inverter

Sasayama, T. & Enpuku, K., Jan 1 2019, In : International Journal of Applied Electromagnetics and Mechanics. 59, 4, p. 1275-1282 8 p.

Research output: Contribution to journalArticle

Eddy current testing
pulse duration modulation
eddy currents
Pulse width modulation
coils
7 Citations (Scopus)

Magnetic parameters evaluation of magnetic nanoparticles for use in biomedical applications

Elrefai, A. L., Yoshida, T. & Enpuku, K., Mar 15 2019, In : Journal of Magnetism and Magnetic Materials. 474, p. 522-527 6 p.

Research output: Contribution to journalArticle

Nanoparticles
nanoparticles
evaluation
Saturation magnetization
Magnetization
Pickups
Magnetometers
inductance
Inductance
magnetometers

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
1 Citation (Scopus)

Optimal Frequency of Low-Frequency Eddy-Current Testing for Detecting Defects on the Backside of Thick Steel Plates

Yoshimura, W., Sasayama, T. & Enpuku, K., Jul 1 2019, In : IEEE Transactions on Magnetics. 55, 7, 8645817.

Research output: Contribution to journalArticle

Eddy current testing
Steel
Defects
Skin effect
Inspection

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

Three-dimensional detection of magnetic nanoparticles using a field-free line with weak field gradient and multiple pickup coils

Hamanaga, S., Yoshida, T., Sasayama, T., Elrefai, A. L. & Enpuku, K., Jan 1 2019, In : Japanese Journal of Applied Physics. 58, 6, 061001.

Research output: Contribution to journalArticle

Open Access
Pickups
coils
Nanoparticles
gradients
nanoparticles

Wash-free detection of biomaterial utilizing magnetic markers and MR sensor

Irie, K., Akiyoshi, K., Yoshida, T. & Enpuku, K., Jan 25 2019, In : Research Reports on Information Science and Electrical Engineering of Kyushu University. 24, 1, p. 17-22 6 p.

Research output: Contribution to journalArticle

Biomaterials
Sensors
Proteins
Washing
Experiments
2018
4 Citations (Scopus)

Detection of Slit Defects on Backside of Steel Plate Using Low-Frequency Eddy-Current Testing

Yoshimura, W., Tanaka, R., Sasayama, T. & Enpuku, K., Nov 2018, In : IEEE Transactions on Magnetics. 54, 11, 8405746.

Research output: Contribution to journalArticle

Eddy current testing
Steel
Defects
Eddy currents
Fluxes

Detection of slit defects on backside of steel plate using low-frequency eddy-current-testing

Yoshimura, W., Tanaka, R., Sasayama, T. & Enpuku, K., Oct 24 2018, 2018 IEEE International Magnetic Conference, INTERMAG 2018. Institute of Electrical and Electronics Engineers Inc., 8508192. (2018 IEEE International Magnetic Conference, INTERMAG 2018).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Eddy current testing
Steel
eddy currents
slits
steels
5 Citations (Scopus)

Empirical expression for DC magnetization curve of immobilized magnetic nanoparticles for use in biomedical applications

Elrefai, A. L., Sasayama, T., Yoshida, T. & Enpuku, K., May 1 2018, In : AIP Advances. 8, 5, 056803.

Research output: Contribution to journalArticle

direct current
nanoparticles
magnetization
curves
simulation

Improving tip position estimation accuracy of gastric tube by compensating geomagnetic field with offset coils

Sasayama, T., Gotoh, Y. & Enpuku, K., Oct 24 2018, 2018 IEEE International Magnetic Conference, INTERMAG 2018. Institute of Electrical and Electronics Engineers Inc., 8508131. (2018 IEEE International Magnetic Conference, INTERMAG 2018).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Magnetic sensors
geomagnetism
Permanent magnets
coils
tubes

Improving tip position-estimation performance of gastric tube by compensating geomagnetic field with offset coils

Sasayama, T., Gotoh, Y. & Enpuku, K., Nov 1 2018, In : IEEE Transactions on Magnetics. 54, 11, 8418311.

Research output: Contribution to journalArticle

Magnetic sensors
Magnetoresistance
Permanent magnets
Sensors
Error analysis

Liquid-phase detection of biomaterial using magnetic markers

Takafuji, Y., Irie, K., Yoshida, T. & Enpuku, K., Jan 2018, In : Research Reports on Information Science and Electrical Engineering of Kyushu University. 23, 1, p. 1-7 7 p.

Research output: Contribution to journalArticle

Biomaterials
Proteins
SQUIDs
Liquids
Washing
1 Citation (Scopus)

Low-noise magnetometer based on inductance modulation in high-critical-temperature superconductor coil

Enpuku, K., Matsuo, M., Yoshida, Y., Yamashita, S., Sasayama, T. & Yoshida, T., Jun 2018, In : Japanese Journal of Applied Physics. 57, 6, 060314.

Research output: Contribution to journalArticle

Magnetometers
inductance
Inductance
low noise
magnetometers
3 Citations (Scopus)

Magnetic fractionation and characterization of magnetic nanoparticles for magnetic particle imaging

Yoshida, T., Nakamura, T., Higashi, O. & Enpuku, K., Aug 2018, In : Japanese Journal of Applied Physics. 57, 8, 080302.

Research output: Contribution to journalArticle

Fractionation
fractionation
Nanoparticles
Imaging techniques
nanoparticles
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

Suppression of flux creep in HTS coil by applying low AC magnetic field

Kajikawa, K., Honda, T. & Tadakuma, K., Apr 2018, In : IEEE Transactions on Applied Superconductivity. 28, 3, 8246546.

Research output: Contribution to journalArticle

alternating current
Creep
coils
retarding
Magnetic fields
1 Citation (Scopus)

Three-dimensional imaging of magnetic nanoparticles using multiple pickup coils and field-free line

Muta, M., Hamanaga, S., Tanaka, N., Sasayama, T., Yoshida, T. & Enpuku, K., Feb 2018, In : Japanese Journal of Applied Physics. 57, 2, 023002.

Research output: Contribution to journalArticle

Pickups
coils
Nanoparticles
Imaging techniques
nanoparticles

Three-Dimensional Magnetic Particle Imaging Utilizing Multiple Pickup Coils and Field-Free Line

Muta, M., Tsujita, Y., Matsuo, M., Sasayama, T., Yoshida, T. & Enpuku, K., Mar 9 2018, 2017 16th International Superconductive Electronics Conference, ISEC 2017. Institute of Electrical and Electronics Engineers Inc., Vol. 2018-January. p. 1-3 3 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Pickups
coils
Nanoparticles
Imaging techniques
nanoparticles
1 Citation (Scopus)

Wash-free detection of C-reactive protein based on third-harmonic signal measurement of magnetic markers

Enpuku, K., Shibakura, M., Arao, Y., Mizoguchi, T., Kandori, A., Hara, M. & Tsukada, K., Sep 2018, In : Japanese Journal of Applied Physics. 57, 9, 090309.

Research output: Contribution to journalArticle

signal measurement
markers
proteins
Proteins
harmonics
2017
2 Citations (Scopus)

A Gastric Tube Monitoring System for Clinical Applications

Sasayama, T., Gotoh, Y. & Enpuku, K., Nov 2017, In : IEEE Transactions on Magnetics. 53, 11, 7946121.

Research output: Contribution to journalArticle

Inverse problems
Permanent magnets
Tablets
Monitoring
Sensors
8 Citations (Scopus)

Biosensing utilizing magnetic markers and superconducting quantum interference devices

Enpuku, K., Tsujita, Y., Nakamura, K., Sasayama, T. & Yoshida, T., Mar 17 2017, In : Superconductor Science and Technology. 30, 5, 053002.

Research output: Contribution to journalReview article

SQUIDs
markers
interference
Remanence
Washing

Development and evaluation of tip position estimation system of gastric tube for practical applications

Sasayama, T., Gotoh, Y. & Enpuku, K., Aug 10 2017, 2017 IEEE International Magnetics Conference, INTERMAG 2017. Institute of Electrical and Electronics Engineers Inc., 8007961

Research output: Chapter in Book/Report/Conference proceedingConference contribution

stomach
nutrients
Nutrients
tubes
evaluation
8 Citations (Scopus)

Eddy Current Testing System Using HTS-SQUID with External Pickup Coil Made of HTS Wire

Tsukamoto, A., Hato, T., Adachi, S., Oshikubo, Y., Cheng, W., Enpuku, K., Tsukada, K. & Tanabe, K., Jun 2017, In : IEEE Transactions on Applied Superconductivity. 27, 4, 7750546.

Research output: Contribution to journalArticle

Eddy current testing
High temperature superconductors
Pickups
SQUIDs
eddy currents
15 Citations (Scopus)

Effect of alignment of easy axes on dynamic magnetization of immobilized magnetic nanoparticles

Yoshida, T., Matsugi, Y., Tsujimura, N., Sasayama, T., Enpuku, K., Viereck, T., Schilling, M. & Ludwig, F., Apr 1 2017, In : Journal of Magnetism and Magnetic Materials. 427, p. 162-167 6 p.

Research output: Contribution to journalArticle

Magnetization
alignment
Nanoparticles
nanoparticles
magnetization
2 Citations (Scopus)
Magnetic cores
Magnetization
Nanoparticles
Magnetic relaxation
Magnetic relaxation measurement

Magnetic core-size distribution of magnetic nanoparticles estimated from magnetization, AC susceptibility and relaxation measurements

Elrefai, A. L., Sasayama, T., Yoshida, T. & Enpuku, K., Aug 10 2017, 2017 IEEE International Magnetics Conference, INTERMAG 2017. Institute of Electrical and Electronics Engineers Inc., 8007882

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Magnetic cores
magnetic cores
immunoassay
hyperthermia
Magnetization
3 Citations (Scopus)

Magnetometer exploiting inductance modulation in coils made of high-critical-temperature superconductor

Enpuku, K., Matsuo, M., Sasayama, T. & Yoshida, T., Nov 2017, In : Applied Physics Express. 10, 11, 113101.

Research output: Contribution to journalArticle

Magnetometers
inductance
Inductance
magnetometers
Superconducting materials
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

Properties of signal caused by the Cracks on the back surface of steel plate in low frequency eddy current testing

Tanaka, R., Sasayama, T., Matsuo, M. & Enpuku, K., Aug 10 2017, 2017 IEEE International Magnetics Conference, INTERMAG 2017. Institute of Electrical and Electronics Engineers Inc., 8007648. (2017 IEEE International Magnetics Conference, INTERMAG 2017).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Eddy current testing
Magnetic permeability
Ferromagnetic materials
ferromagnetic materials
Steel
1 Citation (Scopus)
Nanoparticles
harmonics
nanoparticles
Hysteresis loops
Magnetic moments
6 Citations (Scopus)

Three-dimensional magnetic nanoparticle imaging using small field gradient and multiple pickup coils

Sasayama, T., Tsujita, Y., Morishita, M., Muta, M., Yoshida, T. & Enpuku, K., Apr 1 2017, In : Journal of Magnetism and Magnetic Materials. 427, p. 144-150 7 p.

Research output: Contribution to journalArticle

Pickups
coils
Nanoparticles
Imaging techniques
gradients
2016
2 Citations (Scopus)

AC loss evaluation of an HTS insert for high field magnet cooled by cryocoolers

Kajikawa, K., Awaji, S. & Watanabe, K., Dec 1 2016, In : Cryogenics. 80, p. 215-220 6 p.

Research output: Contribution to journalArticle

high field magnets
inserts
Magnets
alternating current
evaluation
1 Citation (Scopus)

Biological applications of magnetic nanoparticles-for magnetic immunoassay and magnetic particle imaging

Yoshida, T., Sasayama, T. & Enpuku, K., Jan 1 2016, Magnetic Materials Processes and Devices 14. Bonhote, C., Gatzen, H. H., Kitamoto, Y., Zangari, G. & Osaka, T. (eds.). 2 ed. Electrochemical Society Inc., p. 39-47 9 p. (ECS Transactions; vol. 75, no. 2).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Nanoparticles
Imaging techniques
Liquids
15 Citations (Scopus)

Estimation of magnetic moment and anisotropy energy of magnetic markers for biosensing application

Enpuku, K., Sasayama, T. & Yoshida, T., May 14 2016, In : Journal of Applied Physics. 119, 18, 184902.

Research output: Contribution to journalArticle

markers
magnetic moments
anisotropy
energy
curves
1 Citation (Scopus)

Experimental and simulation study on inductance and equivalent resistance using equivalent circuit model and finite element method

Sasayama, T., Yanamoto, Y., Funaji, S. & Ao, T., Jan 1 2016, In : IEEJ Journal of Industry Applications. 5, 5, p. 392-397 6 p.

Research output: Contribution to journalArticle

Equivalent circuits
Inductance
Induction heating
Finite element method
10 Citations (Scopus)

Highly sensitive third-harmonic detection method of magnetic nanoparticles using an AC susceptibility measurement system for liquid-phase assay

Mizoguchi, T., Kandori, A., Kawabata, R., Ogata, K., Hato, T., Tsukamoto, A., Adachi, S., Tanabe, K., Tanaka, S., Tsukada, K. & Enpuku, K., Aug 1 2016, In : IEEE Transactions on Applied Superconductivity. 26, 5, 7492213.

Research output: Contribution to journalArticle

Assays
alternating current
liquid phases
Nanoparticles
magnetic permeability
5 Citations (Scopus)

Improved liquid-phase detection of biological targets based on magnetic markers and high-critical-temperature superconducting quantum interference device

Ura, M., Noguchi, K., Ueoka, Y., Nakamura, K., Sasayama, T., Yoshida, T. & Enpuku, K., Jun 2016, In : IEICE Transactions on Electronics. E99C, 6, p. 669-675 7 p.

Research output: Contribution to journalArticle

SQUIDs
Biotin
Agglomeration
Streptavidin
Liquids
1 Citation (Scopus)

Measurement of iron-plate thickness using HTS coil

Ishida, T., Sasayama, T., Matsuo, M. & Enpuku, K., Jan 14 2016, 2015 15th International Superconductive Electronics Conference, ISEC 2015. Institute of Electrical and Electronics Engineers Inc., 7383469. (2015 15th International Superconductive Electronics Conference, ISEC 2015).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Iron
Eddy current testing
Temperature
Skin effect
Inductance
1 Citation (Scopus)

New detection method of biological targets based on HTS SQUID and magnetic marker

Ura, M., Ueoka, Y., Noguchi, K., Nakamura, K., Sasayama, T., Yoshida, T. & Enpuku, K., Jan 14 2016, 2015 15th International Superconductive Electronics Conference, ISEC 2015. Institute of Electrical and Electronics Engineers Inc., 7383474. (2015 15th International Superconductive Electronics Conference, ISEC 2015).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

SQUIDs
Biotin
Agglomeration
Suspensions
Polymers
7 Citations (Scopus)
shaking
Induced currents
Tapes
tapes
Copper
26 Citations (Scopus)

SQUIDs in biomagnetism: A roadmap towards improved healthcare

Körber, R., Storm, J. H., Seton, H., Makela, J. P., Paetau, R., Parkkonen, L., Pfeiffer, C., Riaz, B., Schneiderman, J. F., Dong, H., Hwang, S. M., You, L., Inglis, B., Clarke, J., Espy, M. A., Ilmoniemi, R. J., Magnelind, P. E., Matlashov, A. N., Nieminen, J. O., Volegov, P. L. & 9 others, Zevenhoven, K. C. J., Höfner, N., Burghoff, M., Enpuku, K., Yang, S. Y., Chieh, J. J., Knuutila, J., Laine, P. & Nenonen, J., Sep 19 2016, In : Superconductor Science and Technology. 29, 11, 113001.

Research output: Contribution to journalReview article

Biomagnetism
biomagnetism
SQUIDs
Magnetoencephalography
interference
8 Citations (Scopus)

Thickness Measurement of an Iron Plate Using Low-Frequency Eddy Current Testing with an HTS Coil

Sasayama, T., Ishida, T., Matsuo, M. & Enpuku, K., Aug 1 2016, In : IEEE Transactions on Applied Superconductivity. 26, 5, 7420626.

Research output: Contribution to journalArticle

Eddy current testing
Thickness measurement
eddy currents
coils
Iron