THz Identification for Defense and Security Purposes : Identifying Materials, Substances, and Items.
Title:
THz Identification for Defense and Security Purposes : Identifying Materials, Substances, and Items.
Author:
Sokolnikov, Andre U.
ISBN:
9789814452397
Personal Author:
Physical Description:
1 online resource (229 pages)
Contents:
Contents -- Preface -- 1. Introduction -- 2. Basics of Electromagnetism -- 2.1. Nature of electromagnetism -- 2.2. Electric fields -- 2.3. Magnetic fields -- 2.4. Static and dynamic fields -- 2.5. Maxwell's equations -- 2.6. Coulomb's law -- 2.7. Gauss's law -- 2.8. Poisson's equation -- 2.9. Electrical properties of materials -- 2.10. Conductors -- 2.11. Resistance -- 2.12. Dielectrics -- 2.13. Magnetostatics -- 2.14. Dynamic fields -- References -- 3. Mathematical Methods of Identification -- 3.1. Process modeling -- 3.1.1. General approach -- 3.1.2. Nonlinear Least Squares Regression (NLSR)'s definition -- 3.2. Developing a model: Example -- 3.3. Validation of the created model -- 3.4. Spectrum analysis -- 3.4.1. General structure model -- 3.5. Signal processing implementation -- 3.5.1. General description -- 3.5.2. Process simulation and identification -- 3.6. Conclusions -- References -- 4. Physics of Producing and Detecting THz Waves -- 4.1. Interaction of THz radiation with matter -- 4.1.1. Photoconductive THz generation: Photoconductive emitters -- 4.1.1.1. Example -- 4.1.2. Photoconductive detectors -- 4.2. Nonlinear optical pulse generation and detection -- 4.2.1. Semiconductor materials -- 4.2.2. Inorganic electro-optical compounds -- 4.2.3. Organic electro-optical compounds -- 4.2.4. Terahertz electro-optical detection -- 4.2.5. Semiconductors and inorganic compounds for detectors -- 4.2.6. Organic crystals -- References -- 5. Methods and Technology for THz Sources, Detectors and Processing Electronics -- 5.1. THz sources -- 5.1.1. Pulsed THz sources -- 5.1.1.1. Example: Electron beam THz source -- 5.1.1.2. Background of electron beam sources -- 5.1.1.3. Source of radiation -- 5.1.1.4. Undulator emission -- 5.1.1.5. Results -- 5.1.2. Semiconductor sources of THz radiation.
5.1.2.1. Example: Electrically pumped photonic-crystal THz laser -- 5.1.3. Continuous wave sources -- 5.1.3.1. Example: Photomixer as CW, design features -- 5.2. THz detectors -- 5.2.1. Quantum superlattice as a THz detector -- 5.2.1.1. Example: THz detector based on layered superlattice -- 5.2.1.2. Resonant detector based on lateral superlattice -- 5.2.1.3. Responsivity of the resonant detector -- 5.2.1.4. Conclusion for example "THz detector based on layered superlattice" -- 5.3. Processing electronics -- 5.3.1. Example: THz source/frequency multiplier -- 5.3.1.1. The active multiplier chain -- 5.3.1.2. Terahertz source evaluation -- 5.4. Imaging using THz radiation -- 5.4.1. Imaging considerations, measurement time and pulse signal-to-noise ratio -- 5.4.2. Parametric images -- 5.4.3. Image spatial resolution capabilities -- 5.4.4. Safety measures for THz radiation -- 5.5. Conclusions -- References -- 6. Electronics for Portable THz Devices -- 6.1. Example: Resonance Amplification - Power Source Based on Resonance Amplification -- References -- 7. THz Applications -- 7.1. THz imaging of nonmetallic structures -- 7.1.1. Identification of tablet structure -- 7.1.2. Interferometry for Terahertz imaging - a possible solution -- 7.1.3. Results for the example -- 7.2. Mobile THz systems -- 7.2.1. Example: Mobile security surveillance system -- 7.2.2. Example: Compact THz system -- 7.3. THz identification of explosives -- 7.3.1. Example: Detection of explosives -- 7.3.1.1. THz spectral signatures of high explosives -- 7.3.1.2. Sensor set-up and operation -- 7.3.2. Recent improvements of explosives identification -- 7.4. THz identification of concealed weapons -- 7.4.1. Image construction -- 7.4.2. Additional improvements for identification of metal objects -- 7.5. THz identification of illicit substances -- 7.6. Prospects and conclusions -- References.
8. Medical and Other Applications of THz Radiation -- 8.1. Data analysis - Example: Wavelet analysis -- 8.1.1. Calculation of refractive index (for the Example) -- 8.1.2. Calculation of absorption coefficient (for the Example) -- 8.1.3. Results for the Example -- 8.2. Dermatology -- 8.3. Hard tissues diagnostics (dentistry, surgery, etc.) -- 8.4. THz characterization of biological and inorganic material (hydrated and anhydrous) -- 8.4.1. Modeling of water intermolecular structure -- 8.4.1.1. THz spectroscopy of hydrated and anhydrous substances -- 8.4.1.2. Conclusions for the examples and theory -- References -- Index.
Abstract:
The principal aim of this book is to provide the reader with the understanding of the possibilities and features of THz identification as opposed to more traditional techniques such as X-rays, microwaves, etc. by elucidating and illustrating the principles of THz identification and its applications in a systematical way. Its scope includes a description of the physical principles of THz generation, transmission and detection, as well as of the applications of THz identification.The inherent advantages and potential benefits of the terahertz (THz) phenomenon, potential that encompasses various aspects such as THz sensing, imaging and material properties investigation with THz radiation for Defense (military) and security applications serve as an important stimulus for the interest in emerging THz science and technology, in particular, the very rapid growth of this new field.This text presents some of the leading fundamental research efforts towards the realization of practical THz devices applications for military and security applications. Relevant chapters contain fundamentals and/or measurements of THz radiation in solid-state materials such as high explosives (e.g. HMX, PETN, RDX, etc.), biological tissues and organic-semiconductor nanostructures. Individual chapters also address the present capabilities of THz equipment for the effective utilization of screening packages and personnel. This book contains descriptions and analyses of the most innovative research in the field; the presented material introduces novel devices and/or concepts that enhance THz source and detector performance - enabling completely new types of sensor performance at THz frequency (e.g. detection at molecular and nanoscale levels), and defining innovative sensing modalities (e.g. remote object and personnel identification) for defense and security.
Local Note:
Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, 2017. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries.
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