Faculty Profiles - UEDA Hiroshi

MISC - UEDA Hiroshi

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医薬用たんぱく質の高勾配磁気分離システムによる高速分離・精製・回収用フィルターの設計

植田浩史, 石山敦士, 我妻洸, 淵野修一郎, 古瀬充穂, 柁川一弘

低温工学・超電導学会講演概要集 79th 2008

Improvement of a High-Gradient Magnetic Separation System for Trapping Immunoglobulin in Serum

Hiroshi Ueda, Koh Agatsuma, Shuichiro Fuchino, Tomohiro Imura, Mitsuho Furuse, Kazuhiro Kajikawa, Atsushi Ishiyama, Tatsuo Koizumi, Shinichiro Miyake

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 79th ( 3 ) 949 - 952 2008

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

Recently, affinity magnetic beads have been widely used in immunomagnetic cell sorting (IMCS) technology. Today, we can easily sort and analyse DNA and antibodies (immunoglobulin) using various types of affinity magnetic beads available in the market. The diameters of the affinity magnetic beads used in immunomagnetic cell sorting are above approximately 1 mu m because of the low magnetic fields induced by permanent magnets. At present, nanosized affinity magnetic beads are strongly desired to achieve high resolutions. We have been studying and attempting to develop a high-gradient magnetic separation (HGMS) system that employs a superconducting magnet to induce a considerably higher magnetic field than that induced by a permanent magnet. The objective is to trap smaller nanosized affinity magnetic beads using a filter made of fine stainless steel wool. In a previous study, we constructed a prototype of a desktop-type HGMS system using a cryocooler-cooled LTS magnet; we conducted preliminary experiments on trapping nanosized magnetic particles and investigated the magnetic field distribution and magnetic force around a magnetic wire in the filter by means of a numerical simulation.In this study, we succeeded in producing prototype nanobeads covered with the biosurfactant of a high-affinity ligand system for immunoglobulin G and M. Furthermore, we attempted to improve the recovery of nanobeads by adding a resonance circuit to the HGMS system. In practice, the trapped nanobeads attract one another and agglomerate due to their remaining magnetization when the magnetic field is decreased to 0 T. Therefore, the nanobeads and wire are demagnetized in the AC magnetic field by the resonance circuit, making good use of the superconducting magnet of the HGMS system.

DOI： 10.1109/TASC.2010.2040158

Web of Science

J-GLOBAL

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球状バルク超電導体のアクティブ磁気浮上における安定性評価

陸旭棟, 青木徹, 石垣善弘, 植田浩史, 我妻洸, 石山敦士, 岩本晃史, 柳長門, 三戸利行

低温工学・超電導学会講演概要集 79th 2008

YBCO超電導線材の過電流パルス通電による特性劣化-YBCO層の厚みの影響-

河野秀太郎, WANG Xudong, 西尾幸恭, 伊豫田章悟, 植田浩史, 石山敦士, 飯島康裕, 斎藤隆, 塩原融

電気学会全国大会講演論文集 2008 ( 5 ) 2008

YBCO超電導ケーブル導体の過電流特性解析

佐藤俊祐, WANG Xudong, 西尾幸恭, 植田浩史, 石山敦士, 八木正史, 向山晋一, 鹿島直二, 長屋重夫, 塩原融

電気学会全国大会講演論文集 2008 ( 5 ) 2008

Radioactive analyses of HTS conductors

植田浩史, 石山敦士, 鹿島直二, 長屋重夫, 宮原信幸

電気学会超電導応用電力機器研究会資料 ASC-08 ( 19-26.28-31 ) 2008

YBCO超電導線材の疲労特性

川井優季, 田中洋輔, 植田浩史, 石山敦士, 飯島康裕, 斉藤隆, 鹿島直二, 長屋重夫, 山田穣, 塩原融

低温工学・超電導学会講演概要集 78th 2008

球状バルク超電導体のアクティブ磁気浮上の安定・位置制御

陸旭棟, 菅兼治, 植田浩史, 我妻洸, 石山敦士

電気学会全国大会講演論文集 2008 ( 5 ) 2008

Strain and Fatigue Properties of YBCO coated conductors

石山敦士, 田中洋輔, 川井優季, 佐藤俊祐, 植田浩史, 塩原融, 山田穣, 飯島康裕, 斉藤隆, 鹿島直二, 長屋重夫

電気学会超電導応用電力機器研究会資料 ASC-08 ( 19-26.28-31 ) 2008

YBCO超電導線材の過電流パルス通電による特性劣化試験

河野秀太郎, WANG Xudong, 西尾幸恭, 佐藤俊祐, 植田浩史, 石山敦士, 鹿島直二, 長屋重夫, 八木正史, 向山晋一, 加藤英幸, 塩原融

低温工学・超電導学会講演概要集 79th 2008

10m級YBCO超電導ケーブルの過電流通電特性

WANG Xudong, 植田浩史, 石山敦士, 八木正史, 向山晋一, 鹿島直二, 長屋重夫, 塩原融

低温工学・超電導学会講演概要集 78th 2008

高温超電導線材の放射化実験

植田浩史, 石山敦士, 鹿島直二, 長屋重夫, 宮原信幸

低温工学・超電導学会講演概要集 78th 2008

YBCO超電導線材の過電流パルス通電による特性劣化試験

佐藤俊祐, 河野秀太郎, WANG Xudong, 植田浩史, 石山敦士, 鹿島直二, 長屋重夫, 八木正史, 向山晋一, 飯島康裕, 斉藤隆, 塩原融

低温工学・超電導学会講演概要集 78th 2008

球状バルク超電導体のアクティブ磁気浮上における安定性評価

陸旭棟, 青木徹, 石垣善弘, 植田浩史, 我妻洸, 石山敦士, 岩本晃史, 柳長門, 三戸利行

低温工学・超電導学会講演概要集 78th 2008

YBCO超電導線材の過電流パルス通電による特性劣化と層間剥離

河野秀太郎, WANG Xudong, 西尾幸恭, 植田浩史, 石山敦士, 鹿島直二, 長屋重夫, 八木正史, 向山晋一, 加藤英幸, 塩原融

低温工学・超電導学会講演概要集 78th 2008

YBCO超電導線材の疲労特性

川井優季, 田中洋輔, 植田浩史, 石山敦士, 飯島康裕, 斉藤隆, 鹿島直二, 長屋重夫, 山田穣, 塩原融

低温工学・超電導学会講演概要集 79th 2008

Levitation Stability of Active Magnetic Levitation using Sphere-shaped HTS bulk

石垣善弘, 陸旭棟, 植田浩史, 我妻洸, 石山敦士

電気学会超電導応用電力機器研究会資料 ASC-08 ( 19-26.28-31 ) 2008

コイル保護に基づくYBCO線材の安定化層厚の決定-SMES用コイルを想定して-

川井優季, 植田浩史, 石山敦士

電気学会全国大会講演論文集 2008 ( 5 ) 2008

Transient stability characteristics of parallel-connected YBCO coated conductors for power transmission cables

Atsushi Ishiyama, Takuya Iwata, Hiroshi Ueda, Shinichi Mukoyama, Yuh Shiohara

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 17 ( 2 ) 1672 - 1675 2007.6

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

YBCO coated conductors are expected to be used in future high-temperature superconductor applications. For the application to power transmission cables, a number of YBCO coated conductors would be connected in parallel and they might be subjected to short-circuit fault currents. Therefore, in order to examine the stability and feasibility of YBCO power transmission cables, it is important to investigate the normal-zone initiation and propagation characteristics of the YBCO tapes and demonstrate the redistribution of transport current and the electromagnetic coupling between YBCO tapes during a short-circuit fault current. In this study, over-current pulses were applied to the two parallel-connected YBCO sample tapes in a liquid nitrogen bath, and the characteristics of the normal-zone initiation and propagation were examined experimentally. Additionally, we also show the experimental results of the redistribution of the transport current between parallel-connected YBCO sample tapes.

DOI： 10.1109/TASC.2007.898005

Web of Science

J-GLOBAL

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Degradation of YBCO coated conductors due to over-current pulse

Ishiyama, A., Tanaka, Y., Ueda, H., Shiohara, Y., Machi, T., Iijima, Y., Saitoh, T., Kashima, N., Mori, M., Watanabe, T., Nagaya, S.

IEEE Transactions on Applied Superconductivity 17 ( 2 ) 3509 - 3512 2007

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

For HTS (High-Temperature Superconductor) applications to electric power devices, superconductors are subjected to short-circuit fault currents 10 to 30 times the normal operating current. These over-currents will drive the HTS conductors normal and degrade or burn-out the HTS conductors. Therefore it is important to establish a novel thermal stability criterion for over-current pulse drive.
In this study, we carried out preliminary experiments on the damage caused by over-current pulse drive focusing on the limitation of the temperature rise without degradation. We prepared five YBCO sample tapes fabricated with IBAD/PLD and IBAD/MOCVD methods. Measurements were performed at 60 K and 80 K (Conduction cooling with Gifford-McMahon cryocooler was adopted) in self-field.
The experimental results indicated that the degradation of the sample tapes for the over-current pulse with a duration of 1 second depended on not the initial critical current I-c, but the peak temperature T-peak. The permissible peak temperature without degradation existed at about 400-600 K. The sample tapes were also observed before and after the experiments by magneto-optic (MO) imaging to find the distribution of degradation area.

DOI： 10.1109/TASC.2007.899708

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