Measurement and Calculation of Residual Magnetic Field in a Bi2223/Ag Magnet
- 23 July 2007
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Applied Superconductivity
- Vol. 17 (2), 2394-2397
- https://doi.org/10.1109/tasc.2007.898137
Abstract
Residual magnetic field in a high temperature superconductor (HTS) magnet is a factor which should be avoided when the field of the magnet is being operated under a high uniformity and high accurate control. In this paper, the residual field in a Bi2223/Ag pancake magnet at 77 K is systematically studied. The amplitude of the residual field as a function of maximum charging current and the relaxation of the residual field are measured. For a magnet with an inner diameter of 60 mm, an outer diameter of 80 mm and a height of 30 mm, the maximum residual field is about 14.5 G after ramping the charging current up to 15 A, followed by dropping the current to zero. A simple model is proposed, from which the residual field can be estimated as along as the configurations of the magnet and the critical current (Ic) of the original short sample are given.Keywords
This publication has 13 references indexed in Scilit:
- Design, construction and performance of an EMS-based HTS maglev vehiclePhysica C: Superconductivity and its Applications, 2005
- Numerical calculation of trapped magnetic field for square and cylindrical superconductorsSuperconductor Science and Technology, 2005
- The design and performance of a Bi-2223/Ag magnet cooled by a single-stage cryocoolerSuperconductor Science and Technology, 2005
- A non-destructive, non-contact, quality test of critical current for Ag-BiSCCO tapeIEEE Transactions on Applied Superconductivity, 2003
- Scanning Hall-probe microscopy of the remanent state of Ag-sheathed Bi2223 tapesSuperconductor Science and Technology, 1996
- Superconductors of finite thickness in a perpendicular magnetic field: Strips and slabsPhysical Review B, 1996
- Magnetic relaxation in high-temperature superconductorsReviews of Modern Physics, 1996
- Magnetization and a Superconducting SolenoidReview of Scientific Instruments, 1964
- Remanent Magnetic Fields in Nb–Zr Superconducting SolenoidsReview of Scientific Instruments, 1963
- CURRENT-CARRYING CAPACITY OF SUPERCONDUCTING Nb–Zr SOLENOIDSApplied Physics Letters, 1962