Analysis of mechanical fabrication experience with CEBAF´s production SRF cavities

Author

Mammosser, J. ; Kneisel, P. ; Benesch, J.F.

Author_Institution

Continuous Electron Beam Accel. Facility, Newport News, VA, USA

fYear

1993

fDate

17-20 May 1993

Firstpage

947

Abstract

CEBAF has received a total of 360 five-cell niobium cavities, the largest group of industrially fabricated superconducting cavities so far. An extensive data base exists on the fabrication, surface treatment, assembly and cavity performance parameters. Analysis of the mechanical features of the cavities includes the following: the spread in fabrication tolerances of the cells derived from field profiles of the “as fabricated” cavities and the “as fabricated” external Q-values of the fundamental power coupler compared to dimensional deviations. A comparison is made of the pressure sensitivity of cavities made of materials from different manufacturers between 760 torr (4.2 K) and 23 torr (2 K)

Keywords

Q-factor; beam handling equipment; cavity resonators; electron accelerators; linear accelerators; superconducting microwave devices; waveguide couplers; 2 K; 23 torr; 4.2 K; 760 torr; CEBAF; Nb; Nb cavities; Q-values; fundamental power coupler; mechanical fabrication; pressure sensitivity; superconducting cavities; tolerances; Circuit optimization; Electron accelerators; Electron beams; Fabrication; Frequency; Linear accelerators; Manufacturing industries; Niobium; Production; Welding;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1993., Proceedings of the 1993

Conference_Location

Washington, DC

Print_ISBN

0-7803-1203-1

Type

conf

DOI

10.1109/PAC.1993.308720

Filename

308720