First test operation of 40 tesla class hybrid magnet system

Inoue, Kiyoshi; Toko, Kiyoshi; Kosuge, M.; Takeuchi, T.; Matsumoto, F.; Maeda, Hiroshi; Hanai, S.; Tezuka, M.; Matsutani, K.

doi:10.1109/20.511368

Cited by 7 publications

(5 citation statements)

References 6 publications

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“…The 40 T-class HM in NIMS consists of a SCM and a Bitter-type WM. 13) A schematic view of the HM is shown in Fig. 1.…”

Section: Methodsmentioning

confidence: 99%

“…11,12) Furthermore, the WM needs much more electric power than that needed by the SCM to generate the same field. A hybrid system consisting of a SCM and a WM, that is, a hybrid magnet (HM), has an advantage in cost and can provide fields of over 30 T. 13) The fields obtained with a HM also have disadvantages in homogeneity and stability. With overcoming these disadvantages, some high-field NMR studies with resistive or hybrid magnets have been reported.…”

Section: Introductionmentioning

confidence: 99%

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High-Field NMR up to 30 T with a Hybrid Magnet

Hashi

Shimizu

Goto

et al. 2005

Jpn. J. Appl. Phys.

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NMR measurements up to 30 T were performed with the hybrid magnet installed in the National Institute for Materials Science (NIMS). The field profile and stability of superconducting, resistive and their hybrid magnets were measured using 63Cu NMR of a Cu metal. The field homogeneity of the hybrid magnet at 30 T is 186±4 ppm in the region ±5 mm from the field center along the z-axis. The magnetic field fluctuates with a total amplitude of about 30 G at 30 T (100 ppm). The present status of the hybrid magnet for high-resolution solid-state NMR measurements is discussed.

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“…The 40 T-class HM in NIMS consists of a SCM and a Bitter-type WM. 13) A schematic view of the HM is shown in Fig. 1.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High-Field NMR up to 30 T with a Hybrid Magnet

Hashi

Shimizu

Goto

et al. 2005

Jpn. J. Appl. Phys.

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“…It should be noted that the duration of the pulse is larger by three orders of magnitude than those previously used in the Article published online by EDP Sciences and available at http://dx.doi.org/10.1051/jp4:1997559 Table 1 Alloy composition, nose-temperature, T,, marteniste volume eaction , f;,, induced by pulse magetic field of 20 MAIq and martensite volume fraction , f, induced by holding under steady magetic field of 17.5 M N m for 2h.. [4,6,7]. Figure 3 shows the structure of a hybrid magnet with 40 T (32 W m ) class, which was constructed several years ago in our institute and has being operated since then [2,3,4]. The basic principle of this hybrid magnet is to combine the outputs of superconduction magnet and water-cooled magnet; the inner water-cooled magnet is able to generate an incremental field of 17.9 W m in a clear bore of 50 mm diameter under a background field of 11.3 MA/m generated by the outer superconduction magnet.…”

Section: Experimental Methodsmentioning

confidence: 99%

Athermal and Isothermal Martensitic Transformations Induced at Room Temperature by Ultra High Magnetic Field

et al. 1997

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Abstract. Effects of ultra high magnetic field of both pulse and steady types on martensitic transformation have been studied, using Fe-Ni-Mn, Fe-Ni-Mn-C alloys with the supplemental tests on Fe-Ni-C and Fe-NiCo-Ti alloys. It is found that the martensitic transformation is induced at room temperature not only athermally but also isothermally either by pulse magnetic field or by steady magnetic field for Fe-Ni-Mn andFe-x-Ivlh-C alloys. This fact is in sharp contrast with that no martensite is induced by ultra high magnetic field for Fe-Ni-C and Fe-Ni-Co-Ti alloys.

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“…The laboratory started its '40 T class' hybrid project in 1988. In 1994 the Toshiba Corporation completed the first version of the hybrid magnet [74]. The outsert consists of 58 double pancakes operating at 4.2 K stacked in four concentric fully stable coils and provides 14.2 T on-axis.…”

Section: Tsukuba Ia Ib the National Research Institute Formentioning

confidence: 99%

“…Ia had a 30 mm bore and used 18 helices made of copper dispersion-strengthened with Al 2 O 3 . It was destructively tested at a total field of 35.7 T [74]. Insert Ia was rebuilt and reached 36.5 T later in 1995 [76].…”

Section: Tsukuba Ia Ib the National Research Institute Formentioning

confidence: 99%

Resistive magnet technology for hybrid inserts

Bird

2004

Supercond. Sci. Technol.

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The world’s highest-field dc magnets have, for roughly the past thirty years, consisted of resistive-superconducting hybrid magnets. These magnets use superconducting technology for the outer coils, where the magnetic field is moderate, and resistive-magnet technology for the inner coils, where the field is highest. In such a configuration, higher fields are attained than is possible with purely superconducting magnet technology, and lower lifetime (capital and operating) costs are attained than with a purely resistive magnet. The resistive coils of these magnets represent the pinnacle of high-field resistive-magnet technology and have been the focus of much of the resistive magnet technology development over the past thirty years. The evolution of high-field resistive magnet technology is presented, focusing on the development of hybrid inserts.

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First test operation of 40 tesla class hybrid magnet system

Cited by 7 publications

References 6 publications

High-Field NMR up to 30 T with a Hybrid Magnet

High-Field NMR up to 30 T with a Hybrid Magnet

Athermal and Isothermal Martensitic Transformations Induced at Room Temperature by Ultra High Magnetic Field

Resistive magnet technology for hybrid inserts

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