Cryocooler Cooled Superconducting Magnets and Their Applications

Hasebe, T.; Sakuraba, J.; Jikihara, Kazunori; Watazawa, K.; Mitsubori, H.; Sugizaki, Y.; Okubo, Hiroshi; Yamada, Yutaka; Awaji, Satoshi; Watanabe, Kazuo

doi:10.1007/978-1-4757-9047-4_34

Cited by 15 publications

(7 citation statements)

References 7 publications

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“…5. The temperature was controlled at 30 C. Figure 5 shows the schematic diagram of experiments conducted using a superconducting magnet (Cryocooled Superconducting Magnet 30) ; SUMITOMO HEAVY INDUSTRY). The magnetic field distribution in the strong magnetic field generator used is shown in Fig.…”

Section: Orientation Of the Polymer Chain Using Strong Magnetic Fieldmentioning

confidence: 99%

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Piezoelectric Characteristics of Polymer Film Oriented under a Strong Magnetic Field

Nakiri

Imoto²,

Ishizuka

et al. 2004

Jpn. J. Appl. Phys.

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The possibility has been indicated that polymers with helical chirality, such as poly-γ-benzyl-L-glutamate (PBLG) and poly-L-lactic acid (PLLA), exhibit a large shear piezoelectric constant. To attempt the realization of a PBLG membrane with a large piezoelectric constant, we fabricated the PBLG membrane oriented by magnetic field force. Concretely, the PBLG membranes were casted from 1,2-dichloroethane solution with various PBLG concentrations under the magnetic field generation equipment incorporating a superconducting magnet. First, the orientation of the chain molecules of the PBLG membranes obtained was observed macroscopically by means of a polarizing microscope (POM). The orientation of the chain molecules of the PBLG membranes was recognized for the case of casting from the PBLG 1,2-dichloroethane solution in the liquid crystal state. Also, from X-ray photograph measurements, it was found that the orientation direction of the chain molecules of PBLG was perpendicular to the magnetic field direction. We then measured the shear piezoelectric constant d 14 of the oriented PBLG membranes. With increasing the strength of the applied magnetic field in the casting process for the film preparation, d 14 * of the PBLG membranes obtained increases. Finally, a large piezoelectric constant of 26 pC/N was found in the PBLG membrane. It is assumed that d 14 * is not saturated even at the magnetic field of 10 T.

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Section: Orientation Of the Polymer Chain Using Strong Magnetic Fieldmentioning

confidence: 99%

“…. Schematic drawings of the strong magnetic field generator used in this study, with a superconducting magnet 30).…”

mentioning

confidence: 99%

Piezoelectric Characteristics of Polymer Film Oriented under a Strong Magnetic Field

Nakiri

Imoto²,

Ishizuka

et al. 2004

Jpn. J. Appl. Phys.

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“…Even though we have few knowledge or experiences of low temperature techniques, high magnetic field such as 10 T in a 100 mm room temperature bore can be obtained by cryocooled superconducting magnets [2]. Moreover, cryocooled superconducting magnets were very useful for the magneto-science such as the magnetic levitation, since the cryocooled superconducting magnets can provide the continual stable high magnetic fields.…”

Section: Introductionmentioning

confidence: 98%

Thermal properties of a large-bore cryocooled 10T superconducting magnet for a hybrid magnet

Ishizuka

Hamajima

Itou

et al. 2010

Physica C: Superconductivity and its Applications

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“…Recently, a superconducting magnet that does not require liquid helium has been developed by realizing the combination of oxide superconductor and highefficiency refrigerator [1]. At present, it is possible for this superconducting magnet to generate a strong magnetic field of 10 T or more.…”

Section: Introductionmentioning

confidence: 99%

Heat Transfer Control in Quiescent Air With Thermal Gradient by Magnetizing Force Under Both Gravitational and Nongravitational Fields

Akamatsu

Higano

Takahashi

et al. 2005

Numerical Heat Transfer, Part A: Applications

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Two-dimensional numerical computations were carried out to clarify the influence of magnetizing force on quiescent air with thermal gradient in a vertical cylindrical container under both gravitational and nongravitational fields. Several sizes and axial positions of a circular electric coil were tested so that the magnetizing force depended on the magnetic gradient. Under both gravitational and nongravitational fields, the convection was induced in quiescent air with thermal gradient by the magnetizing force; however, flow pattern and Nusselt number depended strongly on the size and the axial position of the circular electric coil in addition to the magnetic strength.

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Cryocooler Cooled Superconducting Magnets and Their Applications

Cited by 15 publications

References 7 publications

Piezoelectric Characteristics of Polymer Film Oriented under a Strong Magnetic Field

Piezoelectric Characteristics of Polymer Film Oriented under a Strong Magnetic Field

Thermal properties of a large-bore cryocooled 10T superconducting magnet for a hybrid magnet

Heat Transfer Control in Quiescent Air With Thermal Gradient by Magnetizing Force Under Both Gravitational and Nongravitational Fields

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