Accession Number:

AD0780225

Title:

Superconducting Elf Magnetic Field Sensors for Submarine Communications.

Descriptive Note:

Interim rept.,

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s):

• Wolf,Stuart A.
• Nisenoff,Martin
• Davis,John R.

Report Date:

1974-05-09

Pagination or Media Count:

15.0

Abstract:

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

Descriptors:

• *SUBMARINE ANTENNAS
• *SUPERCONDUCTORS
• GLOBAL COMMUNICATIONS
• EXTREMELY LOW FREQUENCY
• UNDERWATER COMMUNICATIONS
• MAGNETIC FIELDS
• MAGNETIC DETECTORS
• CRYOGENICS

Subject Categories:

• Electrical and Electronic Equipment
• Non-Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE