Author/Authors :
Barber، نويسنده , , G.J. and Braem، نويسنده , , A. and Brook، نويسنده , , N.H. and Cameron، نويسنده , , W. and D’Ambrosio، نويسنده , , C. and Harnew، نويسنده , , N. and Imong، نويسنده , , J. and Lessnoff، نويسنده , , K. and Martin، نويسنده , , R.N. and Metlica، نويسنده , , F.C.D. and Romeo، نويسنده , , R.C. and Websdale، نويسنده , , D.، نويسنده ,
Abstract :
The design, manufacture and characterization of lightweight carbon-fiber spherical converging mirrors for the RICH 1 Cherenkov detector of the LHCb experiment at CERN are described. The mirrors need to be lightweight to minimize the material for traversing particles and fluorocarbon-compatible to avoid degradation in the C4F10 gas radiator of RICH 1. Four large-sized carbon-fiber mirrors covering a total surface area of ∼ 2 m 2 were installed in RICH 1 in July 2007. The mirrors have a radius of curvature of ∼ 2700 mm , a high reflectivity of ∼ 90 % in the 200–600 nm wavelength band, a low areal density of ∼ 5 kg / m 2 equivalent to ∼ 1.2 % of a radiation length. Results of the radiation and fluorocarbon testing of the mirror prototypes are also reported.
Keywords :
rich , Carbon-fiber mirrors , LHCB , Lightweight mirrors , CFRP
