Accession Number : AD0860653

Title :   Quantum Interferometer.

Descriptive Note : Quarterly technical rept. no. 7, 15 Jun-15 Sep 69,

Corporate Author : PHILCO-FORD CORP NEWPORT BEACH CA AERONUTRONIC DIV

Personal Author(s) : Zimmerman, James E.

Report Date : 15 SEP 1969

Pagination or Media Count : 36

Abstract : Point-contact devices are described which have exhibited long-term stability and reliability. A particular mode of operation of the devices as rf-biased low-frequency detectors is described in detail, including a description of how the device drives a resonant circuit to which it is coupled. In this mode of operation the sensitivity of the devices to low-frequency fields is of the order of .000000001 gauss per root cycle band width. Perfectly-clean contacts were made by breaking a notched niobium member at 4.2 degress K and then remaking contact at the break. Quantum behavior of such contacts is identical to that of ordinary contacts, but effects of microscopic multiple connections at the contact were not observed. Some theorems on superconducting flux transformers are derived, which are useful in the design of magnetometers and magnetic gradiometers utilizing superconducting sensors. (Author)

Descriptors :   (*ELECTROMAGNETIC PULSES, DEMODULATORS), SEMICONDUCTOR DEVICES, SUPERCONDUCTORS, INTERFEROMETERS, TUNNELING(ELECTRONICS), TRANSISTORS, SENSITIVITY, MAGNETOMETERS, RELIABILITY(ELECTRONICS).

Subject Categories : Electrical and Electronic Equipment
      Solid State Physics
      Electromagnetic Pulses

Distribution Statement : APPROVED FOR PUBLIC RELEASE