Faculty Profiles - KIWA Toshihiko

MISC - KIWA Toshihiko

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Development and Application of a Compact Rotating-sample Magnetometer Using HTS-SQUID

堺健司, SAARI Mohd Mawardi, 紀和利彦, 塚田啓二

低温工学 49 ( 7 ) 2014

HTS-SQUID回転型磁化率計の高感度化の研究

渡部裕太, 岡本直大, SAARI Mohd Mawardi, 堺健司, 紀和利彦, 塚田啓二

応用物理・物理系学会中国四国支部合同学術講演会講演予稿集 2014 2014

直冷式HTS-SQUIDを用いた太陽電池の光応答特性評価システムの開発

田中洸平, 糟谷尚平, SAARI Mohd Mawardi, 堺健司, 紀和利彦, 塚田啓二

応用物理・物理系学会中国四国支部合同学術講演会講演予稿集 2014 2014

HTS-SQUIDを用いた高精度磁化率計の開発と水溶液中の磁気ナノ粒子への応用

森田洪爾, SAARI Mohd Mawardi, 石原優一, 日下瞬, 塚本有哉, 堺健司, 紀和利彦, 塚田啓二

応用物理・物理系学会中国四国支部合同学術講演会講演予稿集 2014 2014

高温超伝導SQUIDを用いた磁化率計の複合型AC/DC検出ユニットの最適化

SAARI Mohd Mawardi, 森田洪爾, 石原優一, 日下瞬, 堺健司, 紀和利彦, 塚田啓二

応用物理学会秋季学術講演会講演予稿集(CD-ROM) 75th 2014

高感度磁気センサの非破壊検査への応用磁気抵抗効果センサを用いた非破壊検査

紀和利彦, 堺健司, 塚田啓二

非破壊検査 63 ( 11 ) 2014

HTS-SQUIDを用いた試料回転式磁化率計の試料形状最適化による高感度計測法の検討

堺健司, 岡本直大, 渡部裕太, SAARI Mohd Mawardi, 紀和利彦, 塚田啓二

電子情報通信学会大会講演論文集(CD-ROM) 2014 2014

超薄膜Pt/Tiを用いたブリッジ型水素センサの開発

菅井良祐, 武市修蔵, 牛田祐貴, 井並祥太, 堺健司, 紀和利彦, 塚田啓二

センサ・マイクロマシンと応用システムシンポジウム(CD-ROM) 31st 2014

AC/DC高温超伝導SQUID磁化率計による水溶液中の酸化鉄ナノ粒子の磁気特性計測

SAARI Mohd Mawardi, 塚本有哉, 石原優一, 日下瞬, 堺健司, 紀和利彦, 塚田啓二

応用物理学会春季学術講演会講演予稿集(CD-ROM) 61st 2014

保温材下配管外面欠陥の磁気的検査装置の開発

原拓也, 春日基志, 堺健司, 紀和利彦, 塚田啓二

日本磁気学会学術講演概要集 38th 2014

TMRセンサを用いた裏面欠陥の漏洩磁束探傷検査

志賀啓秀, 塚本有哉, 堺健司, 紀和利彦, 西川卓男, 塚田啓二

日本磁気学会学術講演概要集 38th 2014

三層鋼板スポット溶接の磁気を用いた非破壊検査

原田大地, 堺健司, 紀和利彦, 塚田啓二

非破壊検査 63 ( 9 ) 2014

THz-TDSによるPEフィルム含水量の非破壊検査法

松岡泰正, 紀和利彦, 堺健司, 塚田啓二

応用物理学会秋季学術講演会講演予稿集(CD-ROM) 75th 2014

磁場を用いた保温材下配管の外面欠陥検出と位置特定の検討

堺健司, 春日基志, 橋本源基, 紀和利彦, 塚田啓二, 河部俊英

表面探傷シンポジウム講演論文集 17th 2014

産業応用に向けたテラヘルツ波ケミカル顕微鏡の開発

紀和利彦, 堺健司, 塚田啓二

農業食料工学会誌 76 ( 3 ) 2014

Optimization of the Detection Technique for a Vibrating-Sample Magnetometer Using High-T-c SQUID

Mohd Mawardi Saari, Kenji Sakai, Toshihiko Kiwa, Keiji Tsukada

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 23 ( 3 ) 1600204 2013.6

Language：English Publisher：IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

We have developed a compact vibrating-sample magnetometer that uses a high-temperature superconductor superconducting quantum interference device (high-T-c SQUID) and a normal conductive pickup coil. To further increase the sensitivity of the developed system, we consider a technique to detect harmonic components induced at the pickup coil. We optimized the geometry of the pickup coil and sample to maximize the harmonic signals and compared the harmonic signals induced from different shapes of coils using simulation and experimental methods. The simulation and the experimental results agreed well, indicating that the optimized geometry of the pickup coil improves the induced harmonic components. Improvement in sensitivity with reduced mechanical noise can be attained using this detection technique.

DOI： 10.1109/TASC.2012.2227919

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Magnetic evaluation of a solar panel using HTS-SQUID

Toshihiko Kiwa, Yohei Fukudome, Shingo Miyazaki, Mohd Mawardi Saari, Kenji Sakai, Keiji Tsukada

Physica C: Superconductivity and its Applications 494 ( 15 ) 195 - 198 2013

Language：English Publisher：ELSEVIER SCIENCE BV

The magnetic evaluation system of a solar panel using HTS-SQUID has been proposed and developed. A normal pick-up coil was applied to detect the tangential magnetic field to the panel surface. Since the detected field could be related to the currents of the solar panels, the electric properties of the solar panels could be evaluated. In this work, the evaluation of the electric properties of the commercial solar panels as well as the electric circuits made by the discrete devices on the circuit board was visualized. © 2013 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.physc.2013.04.080

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テラヘルツケミカル顕微鏡と応用開拓

紀和利彦

O plus E 35 ( 2 ) 147 - 151 2013

Compact rotating-sample magnetometer for relaxation phenomenon measurement using HTS-SQUID

Kenji Sakai, Mohd Mawardi Saari, Toshihiko Kiwa, Keiji Tsukada

IEEE Transactions on Applied Superconductivity 23 ( 3 ) 1601904 2013

Language：English Publisher：IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

A compact magnetometer that uses a high-temperature superconductor superconducting quantum interference device (HTS-SQUID) that can measure relaxation phenomena was developed, and its characteristics were evaluated. For measuring magnetic relaxation, a pick-up coil was designed to be fixed at any position in the circle described by a rotating-sample. The pick-up coil was directly connected to an input coil, which is inductively connected to the HTS-SQUID, and the secondary induced magnetic field from the sample was detected with time delay after magnetization. Using the developed system, magnetic signals with time delay from pure water were detected, and the magnetic signal intensity decreased with increasing time delay. This magnetic signal with time delay was not caused by the sample case and the magnetization due to the leaked magnetic field distribution of the permanent magnet used for sample magnetization. Thus, the developed system could detect magnetic signals during the magnetic relaxation process. © 2012 IEEE.

DOI： 10.1109/TASC.2012.2234324

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Magnetic detection of currents in an electrolytic cell using high-T <inf>C</inf> SQUID

Toshihiko Kiwa, Yohei Fukudome, Shingo Miyazaki, Mohd Mawardi Saari, Kenji Sakai, Akira Tsukamoto, Seiji Adachi, Keiichi Tanabe, Akihiko Kandori, Keiji Tsukada

IEEE Transactions on Applied Superconductivity 23 ( 3 ) 1600804 2013

Language：English Publisher：IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

A magneto-electrical cyclic voltammetry has been proposed and developed. This measurement method utilized three electrodes: a counter, a working, and a reference electrode, as the conventional voltammetry uses and the magnetic field by the currents were detected. Thus, the current distribution in the electrolyte cells during the voltammetry measurements could be visualized. In this work, the current in the cell was observed during the pulse voltammetry using the high-TC SQUID with the normal pick-up coils. The pick-up coil was aligned parallel to the surface of the cell. Obtained magnetic signals could be related to the current measured by the conventional method. © 2002-2011 IEEE.

DOI： 10.1109/TASC.2012.2228736

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