Title :
Magnetic Field Measurements of an HTS Retrofit Synchrotron Dipole
Author :
Muratore, J. ; Escallier, J. ; Ganetis, G. ; Ghosh, A.K. ; Gupta, R.C. ; He, P. ; Jain, A. ; Joshi, P. ; Wanderer, P. ; Fee, M. ; Christian, M.
Author_Institution :
Brookhaven Nat. Lab., Upton, NY, USA
fDate :
6/1/2011 12:00:00 AM
Abstract :
A copper coil dipole magnet from the National Synchrotron Light Source (NSLS) at Brookhaven National Laboratory (BNL) has been retrofitted by HTS-110 Ltd with coils made from Bi-2223 wire and a self-contained cryogenic cooling system, while keeping the magnet´s original iron yoke. This modified bending dipole, which is the first such known retrofit HTS-based accelerator magnet, provides the benefits of a compact coil design to accommodate space-limited experimental issues and a significant reduction in power costs as compared to the original copper magnet. In order to validate this modified design for use in the synchrotron, a detailed magnetic field map has been measured using a multiple-Hall probe assembly and transporter system. The results are discussed in this paper, along with the performance of the closed circuit cryogenics system in keeping the coils below 45 K.
Keywords :
accelerator magnets; bismuth compounds; copper; high-temperature superconductors; magnetic field measurement; superconducting coils; superconducting magnets; synchrotrons; Bi-2223 wire; HTS retrofit synchrotron dipole; HTS-based accelerator magnet; NSLS; National Synchrotron Light Source; closed circuit cryogenics system; compact coil design; copper coil dipole magnet; iron yoke; magnetic field map; magnetic field measurement; multiple-Hall probe assembly; self-contained cryogenic cooling system; transporter system; Coils; Copper; High temperature superconductors; Magnetic hysteresis; Saturation magnetization; Storage rings; Superconducting magnets; Accelerator magnets; Bi-2223 tape conductor; HTS; high temperature superconductor; magnetic field measurements; superconducting magnets;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2010.2091935
