Development of Low-Cost Single-State SQUID Array Amplifiers for High-Resolution Particle and X-Ray Detectors

HYPRES is developing a novel wide-bandwidth SQUID-based amplifier chip for cryogenic particle detectors. A novel approach for implementing a wide bandwidth and inexpensive SQUID readout scheme was recently proposed and demonstrated by Wilty and Martinis at NIST. The SQUID chip integrated in this system is based on a single analog SQUID coupled to an array of SQUIDs. HYPRES is presently producing and marketing this SQUID amplifier system with associated room temperature electronics, based on an amplifier chip fabricated at HYPRES. In Phase I, we will design, fabricate, and evaluate the SQUID amplifier chips. In Phase II, we procure the peripheral electronics and demonstrate a complete SQUID-based amplifier system. Also, HYPRES, throughout the entire program, will provide NIST with these single-stage SQUID array amplifier chips for evaluation and feedback.