Title :
HTS sensors for NQR spectroscopy
Author :
Wilker, Charles ; McCambridge, James D. ; Laubacher, Daniel B. ; Alvarez, Robby L. ; Guo, Jiunn Sheng ; Carter, Charles F., III ; Pusateri, Michael A. ; Schiano, Jeffrey L.
Author_Institution :
E.I. du Pont de Nemours & Co., Wilmington, DE, USA
Abstract :
Using a high temperature superconductor (HTS) sensor, we have detected a 14N nuclear quadrupole resonance (NQR) signal from a room temperature sodium nitrite (NaNO2) sample. This demonstrates the feasibility of using such sensors for the NQR detection of contraband, e.g. explosives. The sensor is composed of two high Q-value, self-resonant HTS devices strongly coupled to each other that detect the induced magnetization of the target compound. We briefly describe our techniques for making, adjusting the resonant frequency and spoiling the Q-value of the HTS sensors.
Keywords :
explosions; high-temperature superconductors; magnetic resonance; nitrogen; nuclear quadrupole resonance; sensors; sodium compounds; spectroscopy; 14N; HTS sensors; NQR detection; NQR spectroscopy; NaNO2; Q-value; contraband; explosives detection; high temperature superconductor; induced magnetization detection; magnetic resonance; nuclear quadrupole resonance; resonant frequency; room temperature; self-resonant HTS device; superconductor devices; Couplings; Explosives; High temperature superconductors; Magnetic sensors; Magnetization; Resonance; Resonant frequency; Sensor phenomena and characterization; Spectroscopy; Temperature sensors;
Conference_Titel :
Microwave Symposium Digest, 2004 IEEE MTT-S International
Print_ISBN :
0-7803-8331-1
DOI :
10.1109/MWSYM.2004.1335824
