The SLD Cherenkov Ring Imaging Detector uses a proportional wire detector for which a single channel hybrid has been developed. It consists of a preamplifer, gain selectable amplifier, load driver amplifier, power switching, and precision calibrator. For this hybrid, a bipolar, semicustom, integrated circuit has been designed which includes video operational amplifiers for two of the gain stages. This approach allows maximization of the detector volume, allows DC coupling, and enables gain selection. System tests show good noise performance, calibration precision, system linearity, and signal shape uniformity over the full dynamic range.

The front end electronics and data acquisition system for the SLD (SLAC Large Detector) barrel Cerenkov Ring Imaging Detector (CRID) are described. This electronics must provide a 1% charge division measurement with a maximum acceptable noise level of 2000 electrons (RMS). Noise and system performance results are presented for the initial SLD engineering run data. Bench tests and beam data demonstrate that the design goal for noise performance has been reached.< >

The authors describe the front-end electronics for the Cerenkov Ring Imaging Detector (CRID) of the SLD (Stanford Large Detector) at the Stanford Linear Accelerator Center. The design philosophy and implementation are discussed with emphasis on the low-noise hybrid amplifiers, signal processing, and data acquisition electronics. The system receives signals from a highly efficient single-photoelectron detector. These signals are shaped and amplified before being stored in an analog memory and processed by a digitizing system. The data from several analog-to-digital converters are multiplexed and transmitted via fiber optics to the SLD FASTBUS system. The authors highlight the technologies used as well as the space, power-dissipation, and environmental constraints imposed on the system.< >