Methods for reducing RF interference for improved NQR detection of landmines

Long, Kathryn J.; Deas, Robert M.; Gaskell, Michael J.

doi:10.1117/12.486051

Cited by 1 publication

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Unfortunately, this frequency range overlaps with the NQR lines of PETN, TNT and Tetryl to name a few. Numerous methods to mitigate the far field radiation from AM broadcasts have been employed in previous NQR detection systems including: phase cycling, matched filtering and gradiometer antenna design 21,22,23,24 . A coil based gradiometer operates by placement of two or more coils in close proximity to the NQR sample.…”

Section: Discussion and Future Developmentmentioning

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

View full text Add to dashboard Cite

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.

show abstract

Section: Discussion and Future Developmentmentioning

confidence: 99%