STUDIES ON SUPERCONDUCTING THIN FILMS FOR SRF APPLICATIONS

T. TAJIMA; N. HABERKORN; L. CIVALE; G. EREMEEV; M. HAWLEY; R. SCHULZE; A. ZOCCO; J. GUO; V. DOLGASHEV; D. MARTIN; S. TANTAWI.; C. YONEDA; B. MOECKLY; T. DOI; A. MATSUMOTO

Tsukuba

Conferencia; Linear Accelerator Conference LINAC2010; 2010

In order to overcome the fundamental limit of Nb’s critical magnetic field (~ 200 mT) that corresponds to Eacc ~50 MV/m, an idea of coating several thin layers of a superconductor has been proposed. MgB2, a superconductor that has a Tc of ~39 K, has been studied to explore the effect of coating in terms of DC and RF critical magnetic fields, and RF surface losses. MgB2 has shown an excellent behavior, although there is some discrepancy between DC and RF measurements.