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BTeV Ring Imaging Cerenkov Counter (RICH)



The Ring Imaging Cerenkov detector will be used to distinguish different charged particle species.

Cerenkov radiation is emitted by particles traveling with speeds faster than the speed of light in the radiator material, analogous to the sonic boom effect generated by airplanes exceeding the speed of sound in air. The opening angle of the Cerenkov radiation cone measures the speed of the radiating particle (v), which can be used to determine particle mass (m) since the particle momentum (p = mv) is measured independently.


The Ring Imaging Cerenkov detector uses a gaseous radiator (C4F10) in which the particles radiate light. This light is reflected by a spherical mirror. The reflected light is collected by an array of Hybrid Photo Diodes (HPD's).

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Tomasz Skwarnicki
Phone: 315-443-5973
Fax: 315-443-9103
Email: tomasz@physics.syr.edu
This page last updated: Friday, 26-Jul-2002 14:49:00 CDT
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