Preparation and RF tests of L-band superconducting niobium-coated copper cavities

Author

Bosland, P. ; Aspart, A. ; Jacques, E. ; Ribeaudeau, M.

Author_Institution

CEA, Centre d´Etudes Nucleaires de Saclay, Gif-sur-Yvette, France

Volume

9

Issue

2

fYear

1999

fDate

6/1/1999 12:00:00 AM

Firstpage

896

Lastpage

899

Abstract

The development of niobium sputter coated copper cavities is in progress for high gradient applications. Single cell 1.5 GHz cavities have been prepared and tested at CEA Saclay. Performances better than the CEBAF and TTF specifications have been reached: Q/sub 0/=1.7 10/sup 10/ at low field, and E/sub acc/=25 MV/m with Q/sub 0/=1.5 10/sup 9/ limited by the power supply. The high pressure rinsing performed at 30 and 85 bars suppressed field emission without stripping off the coating from the copper surface.

Keywords

accelerator RF systems; accelerator cavities; copper; niobium; sputtered coatings; storage rings; superconducting magnets; synchrotrons; 1.5 GHz; 30 bar; 85 bar; CEA Saclay; Cu; L-band superconducting niobium-coated copper cavities; LEP; Nb; Nb sputtered coatings; RF measurements; RF tests; copper cavities; field emission suppression; high gradient applications; high pressure rinsing; low field; power supply; single cell cavities; Bars; Copper; Fabrication; Flanges; Granular superconductors; L-band; Niobium; Radio frequency; Sputtering; Testing;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.783441

Filename

783441