METHOD AND APPARATUS FOR SENSING THE PRESENCE OF EXPLOSIVES, CONTRABAND AND OTHER MOLECULES USING NUCLEAR QUADRUPOLE RESONANCE
First Claim
1. A method for performing a nuclear quadrupole resonance measurement on a material, comprising the steps of:
- placing a target material between the elements of a balanced transmission line terminated with a resistive element equal to the impedance of the balanced transmission line;
driving the transmission line through a circulator with a signal having a frequency equal to that of one of the spectral lines of the target material; and
,detecting the stimulated emission from the target material from an output of the circulator, whereby interference between the drive signal for the transmission line and the received signal from the transmission line is minimized.
2 Assignments
0 Petitions
Accused Products
Abstract
Stimulated emissions due to nuclear quadropole resonance are detected utilizing a terminated balanced transmission line and a directional coupler for the detection of explosives, contraband, narcotics and the like that exist between the transmission lines, with either a stepped frequency generator utilized to scan between 100 KHz and 10 MHz, or wherein parallel fixed frequency sources are coupled to the transmission line, thereby to permit correlation with expected lines, with the frequency sources being low power so as to not create a safety hazard and so as not to interfere with radiation sensitive devices such as film or electronic circuits that are in the vicinity of the balanced transmission line.
-
Citations
29 Claims
-
1. A method for performing a nuclear quadrupole resonance measurement on a material, comprising the steps of:
-
placing a target material between the elements of a balanced transmission line terminated with a resistive element equal to the impedance of the balanced transmission line; driving the transmission line through a circulator with a signal having a frequency equal to that of one of the spectral lines of the target material; and
,detecting the stimulated emission from the target material from an output of the circulator, whereby interference between the drive signal for the transmission line and the received signal from the transmission line is minimized. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
-
-
29. The method of claim 29, wherein the drug includes Oxycontin.
Specification