Further Improvement of NQR Technique for Detection of Illicit Substances
The nuclear quadrupole resonance (NQR) method has been used for the detection of explosives and other illicit materials in a number of applications, including baggage screening and landmine detection. This method provides automated detection of explosives types in configurations missed by the imaging X-ray method. This paper describes the continuing efforts to improve the function of the NQR baggage scanner by increasing detection sensitivity, and the use of better methods of reducing false alarm events generated from the RF excitation and various types of interference. Based on the current research findings and a review of the previous NQR based scanners, the key design objectives have been identified and discussed.
KeywordsFalse Alarm Rate Nuclear Quadrupole Resonance Short Time Fourier Transform Nuclear Quadrupole Resonance Frequency Quadrupolar Nucleus
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