Abstract
An imaging Cherenkov counter is being developed to measure the velocities of several secondary particles simultaneously over wide ranges in γ (γ ≡ E/m), 20 < γ < 100, and in particle angles (200 mrad × 200 mrad per unit). This detector, called ORCID (Optical Readout Cherenkov Imaging Detector) is distinguished from other CID's by its readout system, which uses a lens to refocus and reduce a mirror image onto an image intensifier. The image intensifier is in turn coupled to an optical CCD array. An ORCID is being developed for use in Fermilab experiment E-609, a hadron jet experiment, and may have other applications.
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