2015年
Attempt to generate a strong and uniform magnetic field by face-to-face HTS bulk elements in a magnet system
Physics Procedia
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- 巻
- 67
- 号
- 開始ページ
- 1005
- 終了ページ
- 1009
- DOI
- 10.1016/j.phpro.2015.06.187
© 2015 The Authors. A unique experimental attempt aiming to obtain a uniform magnetic field space as required for NMR has been carried out with use of HTS bulk magnets. The magnetic poles were activated as 1.8 T (North) and 1.4 T (South) at 30 K by applyinga pulsed magnetic field up to 7 T, and positioned face-to-face with gaps less than 70 mm. The uniformity of the magnetic field required for detecting the NMR signals isless than 1,500 ppm at more than 0.3 T in the cross sectional plane of 2 x 2 mm2. After thepreliminary trials whichrevealed auniformity of 5,421 ppm at 0.44 T in a70 mm gap, we attached a ferromagnetic iron plate to a magnetic pole surface to change the magnetic field distribution to be concave. The best uniformity of 358 ppm at 1.11 T was obtained at 9 mm distance from the iron plate surface in a gap of 30 mm. It is stated that the concave magnetic field distribution was compensated by the counter conical-shape field, resulting in the uniform field plane.
- リンク情報
- ID情報
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- DOI : 10.1016/j.phpro.2015.06.187
- ISSN : 1875-3884
- eISSN : 1875-3892
- SCOPUS ID : 84948424037