Advances in the engineering of quadrupole resonance landmine detection systems

Barrall, Geoffrey A.; Arakawa, M; Barabash, L.S.; Bobroff, S.; Chepin, J. F.; Derby, Kevin; Drew, A. J.; Ermolaev, K. V.; Huo, Shouqin; Lathrop, D. K.; Steiger, Matthew; Stewart, S. H.; Turner, Peter

doi:10.1117/12.603915

Cited by 5 publications

(2 citation statements)

References 22 publications

(25 reference statements)

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“…Nuclear Quadrupole Resonance (NQR) signals from explosives have long been detected by high quality-factor resonant coils to inductively sense the femtotesla-level magnetic field response from materials of interest 1,2 . NQR is a highly selective spectroscopic technique enabling precise determination of chemical species at standoff and through opaque dielectric media 3,4 .…”

Section: Introductionmentioning

confidence: 99%

NQR detection of explosive simulants using RF atomic magnetometers

Monti¹,

Alexson²,

Okamitsu³

2016

Detection and Sensing of Mines, Explosive Objects, and Obscured Targets XXI

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Nuclear Quadrupole Resonance (NQR) is a highly selective spectroscopic method that can be used to detect and identify a number of chemicals of interest to the defense, national security, and law enforcement community. In the past, there have been several documented attempts to utilize NQR to detect nitrogen bearing explosives using induction sensors to detect the NQR RF signatures. We present here our work on the NQR detection of explosive simulants using optically pumped RF atomic magnetometers. RF atomic magnetometers can provide an order of magnitude (or more) improvement in sensitivity versus induction sensors and can enable mitigation of RF interference, which has classically has been a problem for conventional NQR using induction sensors. We present the theory of operation of optically pumped RF atomic magnetometers along with the result of laboratory work on the detection of explosive simulant material. An outline of ongoing work will also be presented along with a path for a fieldable detection system.

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Section: Introductionmentioning

confidence: 99%

NQR detection of explosive simulants using RF atomic magnetometers

Monti¹,

Alexson²,

Okamitsu³

2016

Detection and Sensing of Mines, Explosive Objects, and Obscured Targets XXI

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“…Nuclear quadrupole resonance (NQR) is a solid-state radio frequency (RF) spectroscopic technique that can be used to detect the presence of quadrupolar nuclei, for example 14 N, an element contained in many high explosives [1][2][3][4][5]. Furthermore, as quadrupolar nuclei are prevalent in many narcotics and drugs, NQR can also be used for drug detection and in pharmaceutical applications [6].…”

Section: Introductionmentioning

confidence: 99%

An Overview of NQR Signal Detection Algorithms

Butt

Gudmundson

Jakobsson

2013

NATO Science for Peace and Security Series B: Physics and Biophysics

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Nuclear quadrupole resonance (NQR) is a solid-state radio frequency spectroscopic technique that can be used to detect the presence of quadrupolar nuclei, that are prevalent in many narcotics, drugs, and explosive materials. Similar to other modern spectroscopic techniques, such as nuclear magnetic resonance, and Raman spectroscopy, NQR also relies heavily on statistical signal processing systems for decision making and information extraction. This chapter provides an overview of the current state-of-the-art algorithms for detection, estimation, and classification of NQR signals. More specifically, the problem of NQR-based detection of illicit materials is considered in detail. Several single-and multi-sensor algorithms are reviewed that possess many features of practical importance, including (a) robustness to uncertainties in the assumed spectral amplitudes, (b) exploitation of the polymorphous nature of relevant compounds to improve detection, (c) ability to quantify mixtures, and (d) efficient estimation and cancellation of background noise and radio frequency interference.The authors are at

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Joint Optimization of the Number of Pulses and the Relaxation Pause in the Combined Multiple-Pulse Spin-Locking Sequence for Detecting Explosives by NQR

Mefed

2009

Appl Magn Reson

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Advances in the engineering of quadrupole resonance landmine detection systems

Cited by 5 publications

References 22 publications

NQR detection of explosive simulants using RF atomic magnetometers

NQR detection of explosive simulants using RF atomic magnetometers

An Overview of NQR Signal Detection Algorithms

Joint Optimization of the Number of Pulses and the Relaxation Pause in the Combined Multiple-Pulse Spin-Locking Sequence for Detecting Explosives by NQR

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