Abstract
We developed a shielding current distribution model in a bulk superconductor with the aim of estimating the levitation force. First, we directly measured the magnetic field in axial and radial directions above a bulk Y-Ba-Cu-O superconductor levitated by an electromagnet using a three-dimensional Hall sensor. We then calculated the field distribution by assuming two types of the shielding current distributions and compared the results with the measured values. The field distributions based on the model in that the shielding currents are flowing concentrically at the surface were not in good agreement with the measured data. We then assumed that the shielding currents are not uniform and the boundary has the form of nth hyperbola, which could reproduce the measured field distribution reasonably well.
| Original language | English |
|---|---|
| Pages (from-to) | 731-738 |
| Number of pages | 8 |
| Journal | Physica C: Superconductivity and its Applications |
| Volume | 426-431 |
| Issue number | I |
| DOIs | |
| Publication status | Published - 2005 Oct 1 |
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Keywords
- Bulk superconductor
- Levitation
- Shielding current distribution
- Y-Ba-Cu-O
ASJC Scopus subject areas
- Condensed Matter Physics
Cite this
Three-dimensional field measurements of levitated HTS and the modeling of the shielding current. / Ito, E.; Komano, Y.; Sawa, K.; Iwasa, Y.; Sakai, Naomichi; Hirabayashi, I.; Murakami, Masato.
In: Physica C: Superconductivity and its Applications, Vol. 426-431, No. I, 01.10.2005, p. 731-738.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Three-dimensional field measurements of levitated HTS and the modeling of the shielding current
AU - Ito, E.
AU - Komano, Y.
AU - Sawa, K.
AU - Iwasa, Y.
AU - Sakai, Naomichi
AU - Hirabayashi, I.
AU - Murakami, Masato
PY - 2005/10/1
Y1 - 2005/10/1
N2 - We developed a shielding current distribution model in a bulk superconductor with the aim of estimating the levitation force. First, we directly measured the magnetic field in axial and radial directions above a bulk Y-Ba-Cu-O superconductor levitated by an electromagnet using a three-dimensional Hall sensor. We then calculated the field distribution by assuming two types of the shielding current distributions and compared the results with the measured values. The field distributions based on the model in that the shielding currents are flowing concentrically at the surface were not in good agreement with the measured data. We then assumed that the shielding currents are not uniform and the boundary has the form of nth hyperbola, which could reproduce the measured field distribution reasonably well.
AB - We developed a shielding current distribution model in a bulk superconductor with the aim of estimating the levitation force. First, we directly measured the magnetic field in axial and radial directions above a bulk Y-Ba-Cu-O superconductor levitated by an electromagnet using a three-dimensional Hall sensor. We then calculated the field distribution by assuming two types of the shielding current distributions and compared the results with the measured values. The field distributions based on the model in that the shielding currents are flowing concentrically at the surface were not in good agreement with the measured data. We then assumed that the shielding currents are not uniform and the boundary has the form of nth hyperbola, which could reproduce the measured field distribution reasonably well.
KW - Bulk superconductor
KW - Levitation
KW - Shielding current distribution
KW - Y-Ba-Cu-O
UR - http://www.scopus.com/inward/record.url?scp=25444441076&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=25444441076&partnerID=8YFLogxK
U2 - 10.1016/j.physc.2005.05.027
DO - 10.1016/j.physc.2005.05.027
M3 - Article
AN - SCOPUS:25444441076
VL - 426-431
SP - 731
EP - 738
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - I
ER -