Superconducting Elf Magnetic Field Sensors for Submarine Communications.

摘要

The ferromagnetic-core solenoid used as a trailed antenna for communications reception by submarines has not demonstrated adequate sensitivity to satisfy the performance requirements of deeply submerged submarines receiving ELF transmissions from the planned SANGUINE communications system. It is possible,however,that a superconducting quantum interference device (SQUID) can be adapted to this role and satisfy all requirements of platform depth,speed and maneuverability. The report describes the current status of SQUIDs and presents some laboratory measurements that prove the potential of these devices for ELF communications reception. It also discusses the engineering development that must be pursued in the areas of (a) sensor and electronics dynamic range, (b) sensor orthogonality,and (c) refrigeration systems to make SQUID ELF sensors available as operational receiving antennas. (Author)