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Title: Radiation detector using a bulk high T.sub.c superconductor

A radiation detector (10) is provided, wherein a bulk high T.sub.c superconducting sample (11) is placed in a magnetic field and maintained at a superconducting temperature. Photons of incident radiation will cause localized heating in superconducting loops of the sample destroying trapped flux and redistributing the fluxons, and reducing the critical current of the loops. Subsequent cooling of the sample in the magnetic field will cause trapped flux redistributed Abrikosov fluxons and trapped Josephson fluxons. The destruction and trapping of the fluxons causes changes in the magnetization of the sample inducing currents in opposite directions in a pickup coil (12) which is coupled by an input coil (15) to an rf SQUID (16).
 [1];  [1];  [2];  [3]
  1. (Santa Barbara, CA)
  2. (Ventura, CA)
  3. (Salt Lake City, UT)
Issue Date:
OSTI Identifier:
United States of America as represented by United States (Washington, DC) NVO
Patent Number(s):
US 5268577
Contract Number:
Research Org:
EG & G Energy Measurements Inc
Country of Publication:
United States
radiation; detector; bulk; superconductor; 10; provided; superconducting; sample; 11; placed; magnetic; field; maintained; temperature; photons; incident; localized; heating; loops; destroying; trapped; flux; redistributing; fluxons; reducing; critical; current; subsequent; cooling; redistributed; abrikosov; josephson; destruction; trapping; causes; changes; magnetization; inducing; currents; opposite; directions; pickup; coil; 12; coupled; input; 15; rf; squid; 16; localized heating; incident radiation; opposite direction; opposite directions; magnetic field; radiation detector; critical current; causes changes; subsequent cooling; superconducting temperature; superconducting sample; /250/