Analysis and results of the industrial production of the superconducting Nb/Cu cavities for the LEP 2 project

Author

Chiaveri, E. ; Benvenuti, C. ; Cosso, R. ; Lacarrere, D. ; Schirm, K.M. ; Taufer, M. ; Weingarten, W.

Author_Institution

CERN, Geneva, Switzerland

Volume

3

fYear

1995

fDate

1-5 May 1995

Firstpage

1509

Abstract

For the energy upgrade of the Large Electron Positron Collider at CERN, 216 RF superconducting cavities were ordered from three European industrial firms (Ansaldo,Cerca,Siemens/Accel) at the beginning of 1991. These cavities are made of copper (Cu), internally coated with niobium (Nb) according to a procedure developed at CERN. Up to now about 147 of these cavities fulfilling the specifications have been produced. The large-scale statistics available and the use of dedicated analytical and optical inspection techniques shed new light on the relationship between production procedures, niobium film properties and cavity performance. An overview of this subject is presented, together with some significant trends and results

Keywords

accelerator cavities; copper; electron accelerators; electron device manufacture; niobium; storage rings; superconducting cavity resonators; synchrotrons; LEP 2 project; Large Electron Positron Collider; Nb-Cu; RF superconducting cavities; cavity performance; large-scale statistics; niobium film properties; optical inspection techniques; superconducting Nb/Cu cavities; Copper; Electrons; Large-scale systems; Niobium; Optical films; Performance analysis; Positrons; Production; Radio frequency; Statistical analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1995., Proceedings of the 1995

Conference_Location

Dallas, TX

Print_ISBN

0-7803-2934-1

Type

conf

DOI

10.1109/PAC.1995.505267

Filename

505267