| Budget Amount *help |
¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000)
Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2014: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2013: ¥11,310,000 (Direct Cost: ¥8,700,000、Indirect Cost: ¥2,610,000)
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| Outline of Final Research Achievements |
Nuclear quadrupole resonance (NQR) is known as one of the promising phenomena to realize the detection of hidden explosives. The short detectable distance due to the weak signal detection sensitivity was a significant issue for its practical use. This study was aimed to extend the detectable distance by improving the sensitivity. Firstly, we tried to increase the transmission efficiency by developing a new transmission and reception system, in which the transmission magnetic field with high frequency was modulated by resonance frequency of the target. However, our experiments showed that the excitation efficiency, caused by the nonlinearity of the spins, was very low. Then, we modified and optimized the antenna structure and the excitation pulse sequence in our conventional system. Finally, we achieved the improvement of NQR detection sensitivity. We also made portable landmine detector, and successfully demonstrated the effective detection of landmines buried in Republic of Colombia.
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