Superconducting YBCO Foams as Trapped Field Magnets

Superconducting foams of YBa 2 Cu 3 O y (YBCO) are proposed as trapped field magnets or supermagnets. The foams with an open-porous structure are light-weight, mechanically strong and can be prepared in large sample sizes. The trapped field distributions were measured using a scanning Hall probe on various sides of an YBCO foam sample after field-cooling in a magnetic field of 0.5 T produced by a square Nd-Fe-B permanent magnet. The maximum trapped field (TF) measured is about 400 G (77 K) at the bottom of the sample. Several details of the TF distribution, the current flow and possible applicatons of such superconducting foam samples in space applications, e.g., as active elements in flux-pinning docking interfaces (FPDI) or as portable strong magnets to collect debris in space, are outlined.

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Superconducting YBCO Foams as Trapped Field Magnets

10.20944/preprints201901.0174.v1 ◽

2019 ◽

Author(s):

Michael R. Koblischka ◽

Sugali Pavan Kumar Naik ◽

Anjela Koblischka-Veneva ◽

Masato Murakami ◽

Denis Gokhfeld ◽

...

Keyword(s):

Flux Pinning ◽

Current Flow ◽

Hall Probe ◽

Light Weight ◽

Foam Sample ◽

Space Applications ◽

Trapped Field ◽

Active Elements ◽

Field Distributions ◽

Open Porous Structure

Superconducting foams of YBa$_2$Cu$_3$O$_y$ (YBCO) are proposed as trapped field magnets or supermagnets. The foams with an open-porous structure are light-weight, mechanically strong and can be prepared in large sample sizes. The trapped field distributions were measured using a scanning Hall probe on various sides of an YBCO foam sample after field-cooling in a magnetic field of 0.5 T produced by a square Nd-Fe-B permanent magnet. The maximum trapped field (TF) measured is about 400 G (77 K) at the bottom of the sample. Several details of the TF distribution, the current flow and possible applicatons of such superconducting foam samples in space applications, e.g., as active elements in flux-pinning docking interfaces (FPDI) or as portable strong magnets to collect debris in space, are outlined.

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Scanning Hall probe measurements of field distributions of a coated conductor under applied fields

Superconductor Science and Technology ◽

10.1088/0953-2048/19/12/013 ◽

2006 ◽

Vol 19 (12) ◽

pp. 1291-1296 ◽

Cited By ~ 9

Author(s):

Jaeun Yoo ◽

Yonghwan Jung ◽

Jaeyoung Lee ◽

Sunme Lim ◽

SangMoo Lee ◽

...

Keyword(s):

Coated Conductor ◽

Hall Probe ◽

Field Distributions ◽

Applied Fields ◽

Probe Measurements

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A light-weight, ruggedized klystron amplifier for space applications

10.1109/iedm.1964.187485 ◽

1964 ◽

Cited By ~ 1

Author(s):

J.R. Hechtel ◽

G.L. Sackman

Keyword(s):

Light Weight ◽

Space Applications

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Flux pinning properties of Gd–Ba–Cu–O trapped field magnets grown by a modified top-seeded melt growth

Superconductor Science and Technology ◽

10.1088/0953-2048/27/4/044015 ◽

2014 ◽

Vol 27 (4) ◽

pp. 044015 ◽

Cited By ~ 10

Author(s):

Difan Zhou ◽

Shogo Hara ◽

Beizhan Li ◽

Jacques Noudem ◽

Mitsuru Izumi

Keyword(s):

Flux Pinning ◽

Melt Growth ◽

Trapped Field ◽

Pinning Properties

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The Levitation Characteristics of Ferromagnetic Materials by Ring-Shaped HTS Bulks With Two Trapped Field Distributions

IEEE Transactions on Applied Superconductivity ◽

10.1109/tasc.2013.2242513 ◽

2013 ◽

Vol 23 (3) ◽

pp. 4603204-4603204 ◽

Cited By ~ 1

Author(s):

S. B. Kim ◽

J. Matsunaga ◽

Y. Fujii ◽

H. Onodera

Keyword(s):

Ferromagnetic Materials ◽

Trapped Field ◽

Field Distributions

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Spatial characteristics of electric current and field in large direct-current coronas

Proceedings of the Royal Society of London. Series A: Mathematical and Physical Sciences ◽

10.1098/rspa.1993.0051 ◽

1993 ◽

Vol 441 (1911) ◽

pp. 125-146 ◽

Cited By ~ 14

Keyword(s):

Space Charge ◽

Direct Current ◽

Current Density ◽

Applied Field ◽

Current Flow ◽

Reasonable Accuracy ◽

The Past ◽

Field Distributions ◽

Relationship Of ◽

Very High

The distribution of corona currents arising at the plane of a rod/plane gap has been studied for the past 90 years by using small gaps ranging from 25 to 200 mm but it has not been known until recently whether this distribution changes markedly when the gap is increased to several metres, the sort of gap which is encountered in buildings where very high direct voltages are generated or distributed. The flow of corona creates a space-charge which, in turn, modifies the electric gradient across the gap; such gradients have not previously been measured in large gaps. The present paper reports the current density and field distributions over the plane of rod/plane gaps up to 3 m. The time taken for the space-charge to drift across the gap and the length of the trajectory have been deduced so that a general model of the current flow has been constructed with reasonable accuracy. The inter-relationship of the modification by space-charge of the original applied field and the current density has been established experimentally and theoretically. The phenomena have been studied for corona of both polarities.

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