The synchrotron radiation source is a magnetic device to generate a periodic magnetic field where a relativistic electron moves along a periodic trajectory and emits light called synchrotron radiation (SR), which has been used as a scientific probe for many years in various fields. Although permanent magnets (PMs) are usually used to generate the magnetic field in the SR source because of their cost-effectiveness and availability, a large number of SR sources with superconductors have been constructed for special uses, i.e., to obtain a strong magnetic field over 3 T, which cannot be achieved by using PMs alone. Most of these SR sources are composed of electromagnets with superconducting coils made of NbTi as in commercially available superconducting magnets. For stronger magnetic field, research on application of Nb3Sn is in progress. On the other hand, utilization of high Tcsuperconducting bulk magnets has been recently proposed and R&Ds toward realization are being carried out. This paper reviews the currents status of the SR sources with superconductivity and describes the future perspectives. © 2007 Elsevier B.V. All rights reserved.
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