Design aspects of the RF contacts for the LHC beam vacuum interconnects

Author

Calatroni, S. ; Caspers, F. ; Couturier, K. ; Hilleret, N. ; Knaster, J.R. ; Lépeule, P. ; Taborelli, M. ; Veness, R. ; Vos, L.

Author_Institution

CERN, Geneva, Switzerland

Volume

3

fYear

2001

fDate

2001

Firstpage

2168

Abstract

The LHC requires a very low longitudinal and transverse beam coupling impedance, in particular at low frequencies. This implies an admissible DC contact resistance of less than 0.1 mΩ for the RIF contacts inside the vacuum bellows which must carry the image current (up to 50 A peak) of the beam at each vacuum chamber interconnect. Technological aspects, measurement methods and test results are presented for the contacts which will be used in the LHC. The modified mechanical design and the justifications for specific choices will be discussed

Keywords

accelerator RF systems; colliding beam accelerators; contact resistance; proton accelerators; storage rings; synchrotrons; vacuum apparatus; 0 to 0.1 mohm; 0 to 50 A; LHC beam vacuum interconnects; RF contacts; admissible DC contact resistance; design aspects; longitudinal beam coupling impedance; test results; transverse beam coupling impedance; vacuum bellows; Bellows; Bridges; Contact resistance; Impedance; Inductance; Large Hadron Collider; Magnets; Optical feedback; Radio frequency; Structural beams;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 2001. PAC 2001. Proceedings of the 2001

Conference_Location

Chicago, IL

Print_ISBN

0-7803-7191-7

Type

conf

DOI

10.1109/PAC.2001.987312

Filename

987312