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AssigneeThe United States of America as represented by the United States Department of Energy
InventorsJohn Clarke, Claude Hilbert, Erwin L. Hahn, Tycho Sleator
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An automatic Q-spoiler comprising at least one Josephson tunnel junction connected in an LC circuit for flow of resonant current therethrough. When in use in a system for detecting the magnetic resonance of a gyromagnetic particle system, a high energy pulse of high frequency energy irradiating the particle system will cause the critical current through the Josephson tunnel junctions to be exceeded, causing the tunnel junctions to act as resistors and thereby damp the ringing of the high-Q detection circuit after the pulse. When the current has damped to below the critical current, the Josephson tunnel junctions revert to their zero-resistance state, restoring the Q of the detection circuit and enabling the low energy magnetic resonance signals to be detected.
In a resonant circuit having inductive and capactive components resonantly connected to each other for flow of resonant current through each other, the improvement comprising at least one Josephson tunnel junction connected in series with one of said components for flow of the same resonant current through said junction that flows through said inductive and capacitive components.
A detection system for detecting the gyroprecessional resonance of a specimen having a particle system with magnetic or electric dipole moments, said detection system comprising:
Dependencies are inferred from the claim text.