Progress Towards Large Locally Linearized SQUID Arrays

摘要

We have fabricated 200-SQUID and 480-SQUID arrays, intended for uppers stages of a 2-stage locally linearized amplifier chain to read out frequency-domain multiplexed X-ray transition edge sensors. The SQUIDs are of narrowline construction which allows their use without superconductive shielding. We discuss the design criteria and present preliminary device characteristics. The work is still in progress.