Advances in the engineering of Quadrupole Resonance (QR) sensors for landmine detection have resulted in improved performance, as well as massive reductions in power, size and weight. The next generation of vehicle-mounted QR confirmation sensors is over an order of magnitude smaller and more power efficient than the system fielded in 2002 and 2003. Early prototypes have also demonstrated a significant improvement in TNT sensitivity, and similar improvements are anticipated in RDX sensitivity during Q1 2005. Blind test results from 2003 confirm the radio frequency interference and piezo-electric ringing immunity of the Quantum Magnetics QR Confirmation Sensor (QRCS).
Abstraet. Effect of magnetic field on curing a cross-linked polymer based on diglycidyl ester of terephthaloyl-b/s (4-hydroxy benzoic acid) in liquid crystalline (LC) state was studied using NMR. The magnetic field was shown to inhibit anionic polyme¡In the eourse of spontaneous curing the order degree decreased to 0.5 whereas at anionic polymerization the complete disordering was attained. The ordering of the liquid crystalline polymer can be conserved in anionic polymerization if it is performed under controlled temperature conditions.
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