The Cavity Technology group is responsible for the production of the 21 superconducting cavities at 400 MHz and their cryostats, 16 of which will be installed in the tunnel (8 per beam) and the remaining 5 will be stored as spares. The cavity are single cells and have been built with the same technology successfully used for LEP cavities; they are made of copper on which a thin layer (1-2 mm) is deposed by magnetron sputtering. The production includes 90 Higher Order Mode couplers of two different types, for the damping of longitudinal and transverse HOMs. The production of the power couplers is under the responsibility of the SL/HRF group.
The Superconducting single cell cavities have been produced according to the following specification:
This is a list of some the articles or technical notes concerning the cavities.
LHC Note 132 CERN SL 90-93 RFS Comparison of accelerating cells for the LHC . by Rödel, V ; Rogner, G ; Verolino, L ; 1990 .
CERN SL 92-33 DI The LHC rf system . by Boussard, D ; Rödel, V ; 1993 . 15th International Conference on High-energy Accelerators Hamburg, Germany ; 20 - 24 Jul 1992 Publ. in: Proceedings J Rossbach Int. J. Mod. Phys., A Proc. Suppl. : 2 (1993) A-B World Sci., Singapore,1993 (754-756)
(CERN-SL-98-008-RF) . The Higher-Order Mode Dampers of the 400 MHz Superconducting LHC Cavities . by Häbel, E ; Rödel, V ;Gerigk, F ; Zhao, Z T ; 1997 . 8th Workshop on RF Superconductivity Abano Terme, Italy ; 6 - 10 Oct 1997 Publ. in: Proceedings V Palmieri and A Lombardi INFN, Frascati, 1998 LNL-INFN-133-98 (701-708)
LHC-Project-Report-301 (CERN-LHC-Project-Report-301) . The LHC superconducting cavities . by Boussard, D ; Chiaveri, E ; Häbel, E ;Kindermann, H P ; Losito, R ; Marque, S ; Rödel, V ; Stirbet, M ; 1999 . 1999 Particle Accelerator Conference New York City, NY, USA ; 29 Mar - 2 Apr 1999 Publ. in: Proceedings A Luccio and W MacKay IEEE, New York, 1999
LHC-Project-Report-316 (CERN-LHC-Project-Report-316) . The LHC Superconducting RF System . by Boussard, D ; Linnecar, T ; 1999 .Cryogenic Engineering Conference and International Cryogenic Materials Conference Montreal, Canada ; 12 - 16 Jul 1999
(CERN-SL-99-074-HRF) .The variable power coupler for the LHC superconducting cavity . by Kindermann, H P ; Stirbet, M ; 1999 . 9th Workshop on RF Superconductivity Santa Fe, NM, USA ; 1 - 5 Nov 1999
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