A rad-hard, low-noise, high-speed, BiFET charge preamplifier for the Superconducting Supercollider

An integrated low-noise, radiation-hard, high-speed charge preamplifier prototype, designed for a 10-pF detector cell for warm liquid calorimetry experiments, is presented. An industrial junction-isolated BiFET process, with an 80-MHz f/sub T/ for the p-JFETs and 260-MHz f/sub T/ for the n-p-n transistors, was selected to minimize noise level, as necessitated by such a low detector capacitance. Results of performance tests for total radiation doses of up to 1.4-Mrad gamma rays and 2*10/sup 13/ neutrons/cm/sup 2/ are presented.<>