An sampling detector for the RHIC BPM electronics

The analog detector electronics for the RHIC BPM Instrumentation is described. The detector employs a self-triggered peak detection algorithm for single bunch acquisition of beam position. Optimization of the design for low noise gives excellent position resolution, an internal self-calibration system insures position accuracy to well within the RHIC instrumentation system specification, and switched attenuation and gain insures very broad dynamic range. Design history, current implementation, and test results are described.