Study of superconducting Nb coated 1.5 GHz accelerating cavities

✍ Scribed by S. Rizzo; C. Gualco; Y. Shen; M. Viviani; F. Rosatelli; P. Fabbricatore; G. Gemme; R. Musenich; R. Parodi; B. Zhang

• Book ID: 104110803
• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 312 KB
• Volume: 34
• Category: Article
• ISSN: 0011-2275
• DOI: 10.1016/s0011-2275(05)80180-8

✦ Synopsis

Single cell 1.5 GHz niobium coated accelerating cavities have been developed. Nb film was deposited by cylindrical magnetron sputtering. The film deposited onto the cavities was analyzed by SNMS for depth profile composition and by XRD for microstructure. Critical temperature (To) and residual resistance ratio (RRR) of the films were investigated on A120 3 samples, giving (9.25 + 0.05) K for Tc and 14.5 for RRR. First results of RF measurements on coated cavities showed superficial resistance values in the txf2 range. Possible superficial resistance sources are discussed.