Abstract
Neutron moderation land mine detection involves irradiating the ground with fast neutrons and subsequently detecting the thermalized neutrons which return. This technique has been studied since the 1950s, but only using non-imaging detectors. Without imaging, natural variations in moisture content, surface irregularities, and sensor height variations produce sufficient false alarms to render the method impractical in all but the driest conditions. This paper describes research to design and build a prototype land mine detector based on neutron moderation imaging. After reviewing various neutron detector technologies, a design concept was developed. It consists of a novel thermal neutron imaging system, a unique neutron source to uniformly irradiate the underlying ground, and hardware and software for image generation and enhancement. A proof-of-principle imager has been built, but with a point source offset from the detector to roughly approximate a very weak uniform source at the detector plane. Imagery from the detector of mine surrogates is presented. Realistic Monte Carlo simulations were performed using the same two dimensional neutron imaging geometry as the detector in order to assess its performance. The target-to-background contrast was calculated for various soil types and moisture contents, explosive types and sizes, burial depths, detector standoffs, and ground height variations. The simulations showed that the neutron moderation imager is feasible as a land mine detector in a slow scanning or confirmation role and that image quality should be sufficient to significantly improve detector performance and reduce false alarm rates compared to non-imaging albedo detection, particularly in moist soils, where surface irregularities exist and when the sensor height is uncertain. Performance capability, including spatial resolution and detection times, was estimated.
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References
Coleman, W.A. Ginaven, R.O., and Reynolds, G.M., 1974, Nuclear methods of mine detection, vol. III: Technical Report SAI-74-203-L, Science Applications Inc.
McFee, J.E. and Das, Y., 1980, The detection of buried explosive objects: Canad. J. Remote Sensing, v. 6, p. 104-121.
Moler, R.B., 1985, Workshop report: Nuclear techniques for mine detection research, Lake Luzerne, NY, July 22–25, 1985: Technical Report AD-A167968, Army Belvoir Research and Development Center, November 1986.
McFee, J.E. and Das, Y., 1991, Advances in the location and identification of hidden explosive objects, Technical Report SR 548, Defence Research Establishment Suffield.
Jacobs, A., Dugan, E., Brygoo, S., Ekdahl, D., Houssay, L., and Su, Z., 2002, Lateral migration radiography—a new x-ray backscatter imaging technique: Penetrating Radiation Systems and Applications IV, Barber, H.B., Roehrig, H., Doty, F.P., Porter, L.J., and Morton, E.J., eds.: Proceed. SPIE, v. 4786, pp. 1-16.
Cousins, T., Jones, T.A., Brisson, J.R., McFee, J.E., Jamieson, T.J., Waller, E.J., LeMay, F.J., Ing, H., Clifford, C.E., and Selkirk, B., 1998, The development of a thermal neutron activation (TNA) system as a confirmatory nonmetallic land mine detector: J. Radioanalyt. Nucl. Chem., v. 235, p. 53-58.
Clifford, C.E., Ing, H., McFee, J.E., Andrews, H.R., and Cousins, T., 2000, Second generation thermal neutron activation sensor for confirmatory landmine detection: Transactions of the American Nuclear Society, v. 82, p. 101-102.
McFee, J., Aitken, V., Chesney, R., Das, Y., and Russell, K., 1998, A multisensor, vehicle-mounted, teleoperated mine detector with data fusion: Detection and Remediation Technologies for Mines and Mine-like Targets III, Dubey, A.C., Harvey, J.F., and Broach, J.T., eds.: Proceedings of SPIE, v. 3392, p. 1082-1093.
Haslip, D.S., Cousins, T., Andrews, H.R., Chen, J., Clifford, E.T.H., Ing, H., and McFee, J.E., 2001, DT neutron generator as a source for a thermal neutron activation system for confirmatory land mine detection: Hard X-Ray and Gamma-Ray Detector Physics III, R.B. James, Ed., Proceedings of SPIE, v. 4507, p. 232-242.
Faust, A., 2002, Detection of explosive devices using x-ray backscatter radiation, in Penetrating Radiation Systems and Applications IV, Barber, H.B., Roehrig, H., Doty, F.P., Porter, L.J., and Morton, E.J., eds.: Proceed. SPIE, v. 4786, pp. 17-28.
Church, P., Wort, P., Gagnon, S., and McFee, J., 2001, Performance assessment of an electrical impedance tomography detector for mine-like objects: Detection and Remediation Technologies for Mines and Mine-like Targets VI, Dubey, A.C., Harvey, J.F., Broach, J.T., and George, V., eds.: Proceed. SPIE, v. 4394, p. 120-131.
Garroway, A., Buess, M., Miller, J., Suits, B., Hibbs, A., Barrall, G., Matthews, R., and Burnett, L., 2001, Remote sensing by nuclear quadrupole resonance: IEEE Transactions on Geosci. Remote Sens., v. 6, pp. 1108-1118.
Brooks, F.D., Buffler, A., and Allie, M.S., 2001, Landmine detection by neutron backscattering: 7th International Conference on Appications of Nuclear Techniques, Vourvopoulos, G., ed., University of Western Kentucky.
Datema, C., Bom, V., and Van Eijk, C., 2000, Landmine detection with neutron backscattering method, in Nuclear Science Symposium, October 2000: Proc. IEEE, v. 5. p. 5-111-5-114.
Gorin, A., Kuroda, K., Manuilov, I., Ryazantsev, A., Morimoto, K., Oku, T., Shimizu, H.M., Suzuki, J., Tokanai, F., Clergeau, J.F., and Guerard, B., 2001, A novel type of position-sensitive detectors for slow neutrons based on wavelength shifting fiber readout: International Workshop on Position Sensitive Detectors, Hahn-Meitner Institute, Berlin, pp. 18-19.
Hutchinson, D.P., Richards, R.K., Maxey, L.C., Holcomb, D.E., and Cooper, R.G., 2001, Wavelength-shifting fiber readout of scintillation detectors: International Workshop on Position Sensitive Detectors, Hahn-Meitner Institute, Berlin, pp. 23-24.
Toh, K., Katagiri, M., Sakasai, K., Matsubayashi, M., Birumachi, A., Takahashi, H., and Nakazawa, M., 2001, High-counting-rate 2-dimensional neutron imaging method using scintillators with wavelength shifting fibers: in International Workshop on Position Sensitive Detectors, Hahn-Meitner Institute, Berlin, pp. 63-64.
Vartsky, D., Goldberg, M.B., Shohet, J., Breskin, A., Chechik, R., Guerard, B., and Clergeau, J.F., 2001, Boron rich liquid scintillator for efficient, fast, large area imaging neutron detector, in International Workshop on Position Sensitive Detectors, Hahn-Meitner Institute, Berlin, p. 66.
Ethridge, D.R., 1991, Neutron generator tube, U.S. Patent 4,996,017.
Gow, J.D. and Ruby, L., 1959, Simple, pulsed neutron source based on crossed-field trapping: Rev. Sci. Instruments, v. 30, no. 5, pp. 315.
Briemeister, J.F., 1993, MCNP—a general Monte Carlo n-particle transport code—version 4a: Report LA-12625-M, Los Alamos Laboratory.
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McFee, J.E., Faust, A., Andrews, H.R. et al. The Feasibility of Neutron Moderation Imaging for Land Mine Detection. Subsurface Sensing Technologies and Applications 4, 209–240 (2003). https://doi.org/10.1023/A:1026095707656
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DOI: https://doi.org/10.1023/A:1026095707656