HTS sensors for NQR spectroscopy

Wilker, C.; McCambridge, J.D.; Laubacher, D. B.; Alvarez, Rodrigo; Guo, Jiunn Sheng; Carter, C.F.; Pusateri, Michael A.; Schiano, J.L.

doi:10.1109/mwsym.2004.1335824

Cited by 3 publications

(3 citation statements)

References 10 publications

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“…Detection of NQR with no polarization enhancement is challenging because of the small size and short duration of the rf-induced signal. In light of potential applications of solidstate zero-field NQR in contraband detection, proposals have been made to improve upon the sensitivity of conventional pickup coil detection by using superconducting resonators 7 and sensors ͑superconducting quantum interference devices͒ 8,9 operating at cryogenic temperatures. Our results demonstrate the first detection of NQR with an atomic magnetometer and show that a cryogen-free atomic magnetometer, with intrinsically frequency-independent sensitivity and easy tuning/damping capabilities, could make an attractive new tool for detecting magnetic resonance signals in the kilohertz to megahertz range.…”

mentioning

confidence: 99%

Subfemtotesla radio-frequency atomic magnetometer for detection of nuclear quadrupole resonance

Lee

Sauer

Seltzer

et al. 2006

Applied Physics Letters

156

104

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A radio-frequency tunable atomic magnetometer is developed for detection of nuclear quadrupole resonance ͑NQR͒ from room temperature solids. It has a field sensitivity 0.24 fT/ Hz 1/2 at the 423 kHz 14 N NQR frequency of ammonium nitrate. A potential application of the magnetometer is detection of nitrogen-containing explosives which is difficult with conventional tuned copper coils due to a poor signal-to-noise ratio ͑SNR͒ below a few megahertz. The NQR signal from 22 g of powdered ammonium nitrate located 2 cm away from the sensor is detected with a SNR of 9 in a 4.4-s-long multiple echo sequence, which represents an estimated order-of-magnitude improvement in sensitivity over the pickup coil detection.

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mentioning

confidence: 99%

Subfemtotesla radio-frequency atomic magnetometer for detection of nuclear quadrupole resonance

Lee

Sauer

Seltzer

et al. 2006

Applied Physics Letters

156

104

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“…For comparison, Shiano, et ah, has been able to achieve a Q of over 100,000 at ~3 MHz with a self-resonant High-T c coil made by deposition on a substrate. 3,4 (Note that NQR results have now been obtained using these High-T c coils and are reported in ref.…”

Section: Superconducting Coilsmentioning

confidence: 90%

Scientific Support for NQR Explosive Detection Development

Suits¹

2006

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“…Schiano and DuPont have proposed the use of high-temperature superconducting QR sensors [13]. There are a number of significant technical challenges with the practical use of superconductive coils in the field.…”

Section: Increasing Detection Sensitivitymentioning

confidence: 99%