Apparatus for tuning a system for detecting a target substance through the use of nuclear quadrupole resonance (NQR) or nuclear magnetic resonance (NMR).

A noise immuned gradiometer split shield coil for use in magnetic resonance detection, such as in Nuclear Magnetic Resonance (NMR) and Nuclear Quadrupole Resonance (NQR).

A method for improving accuracy of nuclear quadrupole resonance ('NQR' or 'QR') detection and/or identification of a target sample is disclosed.

A system for detecting a target substance within a class of explosives and narcotics containing quadrupolar nuclei through the use of nuclear quadrupole resonance (NQR).

The sensitive detection of explosives and narcotics by nuclear quadrupole resonance (NQR) is performed at low rf power by assuring that the rf field strength is larger than the local magnetic field.

Apparatus and methods for locating a nuclear quadrupole resonance are described.

The inventive device can be used in devices for transmitting and receiving electromagnetic signals, such as those in nuclear magnetic resonance or nuclear quadrupole resonance systems.

An apparatus for and a method of Nuclear Quadrupole Resonance testing a sample are disclosed.

This invention relates to a method for identifying biological agents using high temperature superconductor enhanced nuclear quadrupole resonance.

The method comprises applying two excitation blocks to excite nuclear quadrupole resonance, there being a given delay time between the two blocks, detecting resonance response signals, and comparing the response signals from respective blocks.