6 October 1994 Portable narcotics detector with identification capability
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A portable hand held hidden substance detector has been developed and manufactured. Neutrons from a californium-252 source are emitted through the front face of the Compact Integrated Narcotics Detection Instrument (CINDI) and penetrate dense compartment materials with little change in energy, but are backscattered by hydrogen rich materials such as drugs. These backscattered neutrons can be readily detected. CINDI incorporates a highly sensitive detection scheme which permits the use of weak radioactive sources for safety without compromising detectability. CINDI is able to detect hydrogen-dense materials most effectively directly behind panels made of steel, wood, fiberglass, or even lead-lined materials. This makes it useful for inspecting marine vessels, ship bulkheads, automobiles, structure walls, or small sealed containers. The present CINDI version selectively detects hydrogen rich substances only. The new technique will detect both neutrons and gamma rays simultaneously. The backscatter mechanism of gamma rays and neutrons are sufficiently different that they complement each other and lead to a higher likelihood of identifying the concealed material.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Tumay O. Tumer, Tumay O. Tumer, R. M. Pierce, R. M. Pierce, K. C. Dotson, K. C. Dotson, Joseph Richard Jadamec, Joseph Richard Jadamec, Chih-Wu Su, Chih-Wu Su, } "Portable narcotics detector with identification capability", Proc. SPIE 2276, Cargo Inspection Technologies, (6 October 1994); doi: 10.1117/12.189175; https://doi.org/10.1117/12.189175


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